code update

2021-06-10 13:00:29 +02:00
parent d1e8b0db1a
commit 6828298485
26 changed files with 4699 additions and 0 deletions
--- a/MilliOhmMeter_FW/.gitignore
+++ b/MilliOhmMeter_FW/.gitignore
@@ -0,0 +1,6 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
+
--- a/MilliOhmMeter_FW/.vscode/extensions.json
+++ b/MilliOhmMeter_FW/.vscode/extensions.json
@@ -0,0 +1,7 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ]
+}
--- a/MilliOhmMeter_FW/_images/background.bmp
+++ b/MilliOhmMeter_FW/_images/background.bmp
--- a/MilliOhmMeter_FW/include/README
+++ b/MilliOhmMeter_FW/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
--- a/MilliOhmMeter_FW/lib/README
+++ b/MilliOhmMeter_FW/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
--- a/MilliOhmMeter_FW/lib/oled/API.md
+++ b/MilliOhmMeter_FW/lib/oled/API.md
@@ -0,0 +1,280 @@
+The OLED library is migration from [https://github.com/ThingPulse/esp8266-oled-ssd1306](https://github.com/ThingPulse/esp8266-oled-ssd1306)
+
+
+
+## Features
+
+* Draw pixels at given coordinates
+* Draw lines from given coordinates to given coordinates
+* Draw or fill a rectangle with given dimensions
+* Draw Text at given coordinates:
+ * Define Alignment: Left, Right and Center
+ * Set the Fontface you want to use (see section Fonts below)
+ * Limit the width of the text by an amount of pixels. Before this widths will be reached, the renderer will wrap the text to a new line if possible
+* Display content in automatically side scrolling carousel
+ * Define transition cycles
+ * Define how long one frame will be displayed
+ * Draw the different frames in callback methods
+ * One indicator per frame will be automatically displayed. The active frame will be displayed from inactive once
+
+## API
+
+### Display Control
+
+```C++
+// Initialize the display
+void init();
+
+// Free the memory used by the display
+void end();
+
+// Cycle through the initialization
+void resetDisplay(void);
+
+// Connect again to the display through I2C
+void reconnect(void);
+
+// Turn the display on
+void displayOn(void);
+
+// Turn the display offs
+void displayOff(void);
+
+// Clear the local pixel buffer
+void clear(void);
+
+// Write the buffer to the display memory
+void display(void);
+
+// Inverted display mode
+void invertDisplay(void);
+
+// Normal display mode
+void normalDisplay(void);
+
+// Set display contrast
+// really low brightness & contrast: contrast = 10, precharge = 5, comdetect = 0
+// normal brightness & contrast:  contrast = 100
+void setContrast(uint8_t contrast, uint8_t precharge = 241, uint8_t comdetect = 64);
+
+// Convenience method to access
+void setBrightness(uint8_t);
+
+// Turn the display upside down
+void flipScreenVertically();
+
+// Draw the screen mirrored
+void mirrorScreen();
+```
+
+## Pixel drawing
+
+```C++
+
+/* Drawing functions */
+// Sets the color of all pixel operations
+// color : BLACK, WHITE, INVERSE
+void setColor(OLEDDISPLAY_COLOR color);
+
+// Draw a pixel at given position
+void setPixel(int16_t x, int16_t y);
+
+// Draw a line from position 0 to position 1
+void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1);
+
+// Draw the border of a rectangle at the given location
+void drawRect(int16_t x, int16_t y, int16_t width, int16_t height);
+
+// Fill the rectangle
+void fillRect(int16_t x, int16_t y, int16_t width, int16_t height);
+
+// Draw the border of a circle
+void drawCircle(int16_t x, int16_t y, int16_t radius);
+
+// Fill circle
+void fillCircle(int16_t x, int16_t y, int16_t radius);
+
+// Draw a line horizontally
+void drawHorizontalLine(int16_t x, int16_t y, int16_t length);
+
+// Draw a lin vertically
+void drawVerticalLine(int16_t x, int16_t y, int16_t length);
+
+// Draws a rounded progress bar with the outer dimensions given by width and height. Progress is
+// a unsigned byte value between 0 and 100
+void drawProgressBar(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t progress);
+
+// Draw a bitmap in the internal image format
+void drawFastImage(int16_t x, int16_t y, int16_t width, int16_t height, const uint8_t *image);
+
+// Draw a XBM
+void drawXbm(int16_t x, int16_t y, int16_t width, int16_t height, const char* xbm);
+```
+
+## Text operations
+
+``` C++
+void drawString(int16_t x, int16_t y, String text);
+
+// Draws a String with a maximum width at the given location.
+// If the given String is wider than the specified width
+// The text will be wrapped to the next line at a space or dash
+void drawStringMaxWidth(int16_t x, int16_t y, int16_t maxLineWidth, String text);
+
+// Returns the width of the const char* with the current
+// font settings
+uint16_t getStringWidth(const char* text, uint16_t length);
+
+// Convencience method for the const char version
+uint16_t getStringWidth(String text);
+
+// Specifies relative to which anchor point
+// the text is rendered. Available constants:
+// TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER, TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER_BOTH
+void setTextAlignment(OLEDDISPLAY_TEXT_ALIGNMENT textAlignment);
+
+// Sets the current font. Available default fonts
+// ArialMT_Plain_10, ArialMT_Plain_16, ArialMT_Plain_24
+// Or create one with the font tool at http://oleddisplay.squix.ch
+void setFont(const uint8_t* fontData);
+```
+
+## Ui Library (OLEDDisplayUi)
+
+The Ui Library is used to provide a basic set of Ui elements called, `Frames` and `Overlays`. A `Frame` is used to provide
+information the default behaviour is to display a `Frame` for a defined time and than move to the next. The library also provides an `Indicator` that will be updated accordingly. An `Overlay` on the other hand is a pieces of information (e.g. a clock) that is displayed always at the same position.
+
+
+```C++
+/**
+ * Initialise the display
+ */
+void init();
+
+/**
+ * Configure the internal used target FPS
+ */
+void setTargetFPS(uint8_t fps);
+
+/**
+ * Enable automatic transition to next frame after the some time can be configured with
+ * `setTimePerFrame` and `setTimePerTransition`.
+ */
+void enableAutoTransition();
+
+/**
+ * Disable automatic transition to next frame.
+ */
+void disableAutoTransition();
+
+/**
+ * Set the direction if the automatic transitioning
+ */
+void setAutoTransitionForwards();
+void setAutoTransitionBackwards();
+
+/**
+ *  Set the approx. time a frame is displayed
+ */
+void setTimePerFrame(uint16_t time);
+
+/**
+ * Set the approx. time a transition will take
+ */
+void setTimePerTransition(uint16_t time);
+
+/**
+ * Draw the indicator.
+ * This is the default state for all frames if
+ * the indicator was hidden on the previous frame
+ * it will be slided in.
+ */
+void enableIndicator();
+
+/**
+ * Don't draw the indicator.
+ * This will slide out the indicator
+ * when transitioning to the next frame.
+ */
+void disableIndicator();
+
+/**
+ * Enable drawing of all indicators.
+ */
+void enableAllIndicators();
+
+/**
+ * Disable drawing of all indicators.
+ */
+void disableAllIndicators();
+
+/**
+ * Set the position of the indicator bar.
+ */
+void setIndicatorPosition(IndicatorPosition pos);
+
+/**
+ * Set the direction of the indicator bar. Defining the order of frames ASCENDING / DESCENDING
+ */
+void setIndicatorDirection(IndicatorDirection dir);
+
+/**
+ * Set the symbol to indicate an active frame in the indicator bar.
+ */
+void setActiveSymbol(const char* symbol);
+
+/**
+ * Set the symbol to indicate an inactive frame in the indicator bar.
+ */
+void setInactiveSymbol(const char* symbol);
+
+/**
+ * Configure what animation is used to transition from one frame to another
+ */
+void setFrameAnimation(AnimationDirection dir);
+
+/**
+ * Add frame drawing functions
+ */
+void setFrames(FrameCallback* frameFunctions, uint8_t frameCount);
+
+/**
+ * Add overlays drawing functions that are draw independent of the Frames
+ */
+void setOverlays(OverlayCallback* overlayFunctions, uint8_t overlayCount);
+
+/**
+ * Set the function that will draw each step
+ * in the loading animation
+ */
+void setLoadingDrawFunction(LoadingDrawFunction loadingDrawFunction);
+
+/**
+ * Run the loading process
+ */
+void runLoadingProcess(LoadingStage* stages, uint8_t stagesCount);
+
+// Manuell Controll
+void nextFrame();
+void previousFrame();
+
+/**
+ * Switch without transition to frame `frame`.
+ */
+void switchToFrame(uint8_t frame);
+
+/**
+ * Transition to frame `frame`, when the `frame` number is bigger than the current
+ * frame the forward animation will be used, otherwise the backwards animation is used.
+ */
+void transitionToFrame(uint8_t frame);
+
+// State Info
+OLEDDisplayUiState* getUiState();
+
+// This needs to be called in the main loop
+// the returned value is the remaining time (in ms)
+// you have to draw after drawing to keep the frame budget.
+int8_t update();
+```
+
--- a/MilliOhmMeter_FW/lib/oled/OLEDDisplay.cpp
+++ b/MilliOhmMeter_FW/lib/oled/OLEDDisplay.cpp
--- a/MilliOhmMeter_FW/lib/oled/OLEDDisplay.h
+++ b/MilliOhmMeter_FW/lib/oled/OLEDDisplay.h
@@ -0,0 +1,345 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
+ * Copyright (c) 2018 by Fabrice Weinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * ThingPulse invests considerable time and money to develop these open source libraries.
+ * Please support us by buying our products (and not the clones) from
+ * https://thingpulse.com
+ *
+ */
+
+#ifndef OLEDDISPLAY_h
+#define OLEDDISPLAY_h
+
+#include <Arduino.h>
+#include "OLEDDisplayFonts.h"
+
+//#define DEBUG_OLEDDISPLAY(...) Serial.printf( __VA_ARGS__ )
+
+#ifndef DEBUG_OLEDDISPLAY
+#define DEBUG_OLEDDISPLAY(...)
+#endif
+
+// Use DOUBLE BUFFERING by default
+#ifndef OLEDDISPLAY_REDUCE_MEMORY
+#define OLEDDISPLAY_DOUBLE_BUFFER
+#endif
+
+// Header Values
+#define JUMPTABLE_BYTES 4
+
+#define JUMPTABLE_LSB   1
+#define JUMPTABLE_SIZE  2
+#define JUMPTABLE_WIDTH 3
+#define JUMPTABLE_START 4
+
+#define WIDTH_POS 0
+#define HEIGHT_POS 1
+#define FIRST_CHAR_POS 2
+#define CHAR_NUM_POS 3
+
+
+// Display commands
+#define CHARGEPUMP 0x8D
+#define COLUMNADDR 0x21
+#define COMSCANDEC 0xC8
+#define COMSCANINC 0xC0
+#define DISPLAYALLON 0xA5
+#define DISPLAYALLON_RESUME 0xA4
+#define DISPLAYOFF 0xAE
+#define DISPLAYON 0xAF
+#define EXTERNALVCC 0x1
+#define INVERTDISPLAY 0xA7
+#define MEMORYMODE 0x20
+#define NORMALDISPLAY 0xA6
+#define PAGEADDR 0x22
+#define SEGREMAP 0xA0
+#define SETCOMPINS 0xDA
+#define SETCONTRAST 0x81
+#define SETDISPLAYCLOCKDIV 0xD5
+#define SETDISPLAYOFFSET 0xD3
+#define SETHIGHCOLUMN 0x10
+#define SETLOWCOLUMN 0x00
+#define SETMULTIPLEX 0xA8
+#define SETPRECHARGE 0xD9
+#define SETSEGMENTREMAP 0xA1
+#define SETSTARTLINE 0x40
+#define SETVCOMDETECT 0xDB
+#define SWITCHCAPVCC 0x2
+
+#ifndef _swap_int16_t
+#define _swap_int16_t(a, b) { int16_t t = a; a = b; b = t; }
+#define _swap_uint16_t(a, b) { uint16_t t = a; a = b; b = t; }
+
+#endif
+
+enum OLEDDISPLAY_COLOR {
+  BLACK = 0,
+  WHITE = 1,
+  INVERSE = 2
+};
+
+enum OLEDDISPLAY_TEXT_ALIGNMENT {
+  TEXT_ALIGN_LEFT = 0,
+  TEXT_ALIGN_RIGHT = 1,
+  TEXT_ALIGN_CENTER = 2,
+  TEXT_ALIGN_CENTER_BOTH = 3
+};
+
+
+enum OLEDDISPLAY_GEOMETRY {
+  GEOMETRY_128_64   = 0,
+  GEOMETRY_128_32,
+  GEOMETRY_64_32,
+  GEOMETRY_RAWMODE,
+};
+
+
+enum OLEDDISPLAY_ANGLE {
+  ANGLE_0_DEGREE = 0,
+  ANGLE_90_DEGREE,
+  ANGLE_180_DEGREE,
+  ANGLE_270_DEGREE,
+};
+
+
+typedef char (*FontTableLookupFunction)(const uint8_t ch);
+char DefaultFontTableLookup(const uint8_t ch);
+
+
+class OLEDDisplay : public Print {
+
+  public:
+	OLEDDisplay();
+    virtual ~OLEDDisplay();
+
+    uint16_t width(void) const { return displayWidth; };
+    uint16_t height(void) const { return displayHeight; };
+
+    // Initialize the display
+    bool init();
+
+    // Free the memory used by the display
+    void end();
+
+    void sleep();
+
+    void wakeup();
+
+    // Cycle through the initialization
+    void resetDisplay(uint8_t rstPin);
+
+    /* Drawing functions */
+    // Sets the color of all pixel operations
+    void setColor(OLEDDISPLAY_COLOR color);
+
+    // Returns the current color.
+    OLEDDISPLAY_COLOR getColor();
+
+    // Draw a pixel at given position
+    void setPixel(int16_t x, int16_t y);
+
+    // Draw a pixel at given position and color
+    void setPixelColor(int16_t x, int16_t y, OLEDDISPLAY_COLOR color);
+
+    // Clear a pixel at given position FIXME: INVERSE is untested with this function
+    void clearPixel(int16_t x, int16_t y);
+
+    // Draw a line from position 0 to position 1
+    void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1);
+
+    // Draw the border of a rectangle at the given location
+    void drawRect(int16_t x, int16_t y, int16_t width, int16_t height);
+
+    // Fill the rectangle
+    void fillRect(int16_t x, int16_t y, int16_t width, int16_t height);
+
+    // Draw the border of a circle
+    void drawCircle(int16_t x, int16_t y, int16_t radius);
+
+    // Draw all Quadrants specified in the quads bit mask
+    void drawCircleQuads(int16_t x0, int16_t y0, int16_t radius, uint8_t quads);
+
+    // Fill circle
+    void fillCircle(int16_t x, int16_t y, int16_t radius);
+
+    // Draw a line horizontally
+    void drawHorizontalLine(int16_t x, int16_t y, int16_t length);
+
+    // Draw a line vertically
+    void drawVerticalLine(int16_t x, int16_t y, int16_t length);
+
+    // Draws a rounded progress bar with the outer dimensions given by width and height. Progress is
+    // a unsigned byte value between 0 and 100
+    void drawProgressBar(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t progress);
+
+    // Draw a bitmap in the internal image format
+    void drawFastImage(int16_t x, int16_t y, int16_t width, int16_t height, const uint8_t *image);
+
+    // Draw a XBM
+    void drawXbm(int16_t x, int16_t y, int16_t width, int16_t height, const uint8_t *xbm);
+
+    // Draw icon 16x16 xbm format
+    void drawIco16x16(int16_t x, int16_t y, const char *ico, bool inverse = false);
+
+    /* Text functions */
+
+    // Draws a string at the given location
+    void drawString(int16_t x, int16_t y, String text);
+
+    // Draws a String with a maximum width at the given location.
+    // If the given String is wider than the specified width
+    // The text will be wrapped to the next line at a space or dash
+    void drawStringMaxWidth(int16_t x, int16_t y, uint16_t maxLineWidth, String text);
+
+    // Returns the width of the const char* with the current
+    // font settings
+    uint16_t getStringWidth(const char* text, uint16_t length);
+
+    // Convencience method for the const char version
+    uint16_t getStringWidth(String text);
+
+    // Specifies relative to which anchor point
+    // the text is rendered. Available constants:
+    // TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER, TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER_BOTH
+    void setTextAlignment(OLEDDISPLAY_TEXT_ALIGNMENT textAlignment);
+
+    // Sets the current font. Available default fonts
+    // ArialMT_Plain_10, ArialMT_Plain_16, ArialMT_Plain_24
+    void setFont(const uint8_t *fontData);
+
+    // Set the function that will convert utf-8 to font table index
+    void setFontTableLookupFunction(FontTableLookupFunction function);
+
+    /* Display functions */
+
+    // Turn the display on
+    void displayOn(void);
+
+    // Turn the display offs
+    void displayOff(void);
+
+    // Inverted display mode
+    void invertDisplay(void);
+
+    // Normal display mode
+    void normalDisplay(void);
+
+    // Set display contrast
+    // really low brightness & contrast: contrast = 10, precharge = 5, comdetect = 0
+    // normal brightness & contrast:  contrast = 100
+    void setContrast(uint8_t contrast, uint8_t precharge = 241, uint8_t comdetect = 64);
+
+    // Convenience method to access 
+    void setBrightness(uint8_t);
+
+    // Reset display rotation or mirroring
+    void resetOrientation();
+
+    void screenRotate(OLEDDISPLAY_ANGLE angle);
+    void resetScreenRotate();
+    // Turn the display upside down
+    void flipScreenVertically();
+
+    // Mirror the display (to be used in a mirror or as a projector)
+    void mirrorScreen();
+
+    // Write the buffer to the display memory
+    virtual void display(void) = 0;
+
+    // Clear the local pixel buffer
+    void clear(void);
+
+    // Log buffer implementation
+
+    // This will define the lines and characters you can
+    // print to the screen. When you exeed the buffer size (lines * chars)
+    // the output may be truncated due to the size constraint.
+    bool setLogBuffer(uint16_t lines, uint16_t chars);
+
+    // Draw the log buffer at position (x, y)
+    void drawLogBuffer(uint16_t x, uint16_t y);
+
+    // Get screen geometry
+    uint16_t getWidth(void);
+    uint16_t getHeight(void);
+
+    // Implement needed function to be compatible with Print class
+    size_t write(uint8_t c);
+    size_t write(const char* s);
+	
+    // Implement needed function to be compatible with Stream clas
+
+
+    uint8_t            *buffer;
+    #ifdef OLEDDISPLAY_DOUBLE_BUFFER
+    uint8_t            *buffer_back = NULL;
+    #endif
+
+  protected:
+
+    OLEDDISPLAY_GEOMETRY geometry              = GEOMETRY_128_64;
+
+    uint16_t  displayWidth                     = 128;
+    uint16_t  displayHeight                    = 64;
+    uint16_t  displayBufferSize                = 1024;
+	OLEDDISPLAY_ANGLE rotate_angle = ANGLE_0_DEGREE;
+    // Set the correct height, width and buffer for the geometry
+    void setGeometry(OLEDDISPLAY_GEOMETRY g);
+
+    OLEDDISPLAY_TEXT_ALIGNMENT   textAlignment = TEXT_ALIGN_LEFT;
+    OLEDDISPLAY_COLOR            color         = WHITE;
+
+    const uint8_t          *fontData     = ArialMT_Plain_10;
+
+    // State values for logBuffer
+    uint16_t   logBufferSize                   = 0;
+    uint16_t   logBufferFilled                 = 0;
+    uint16_t   logBufferLine                   = 0;
+    uint16_t   logBufferMaxLines               = 0;
+    char      *logBuffer                       = NULL;
+
+
+	// the header size of the buffer used, e.g. for the SPI command header
+	virtual int getBufferOffset(void) = 0;
+	
+    // Send a command to the display (low level function)
+    virtual void sendCommand(uint8_t com) {(void)com;};
+
+    // Connect to the display
+    virtual bool connect() { return false; };
+
+    // Send all the init commands
+    void sendInitCommands();
+
+    // converts utf8 characters to extended ascii
+    char* utf8ascii(String s);
+
+    void inline drawInternal(int16_t xMove, int16_t yMove, int16_t width, int16_t height, const uint8_t *data, uint16_t offset, uint16_t bytesInData) __attribute__((always_inline));
+
+    void drawStringInternal(int16_t xMove, int16_t yMove, char* text, uint16_t textLength, uint16_t textWidth);
+    
+    FontTableLookupFunction fontTableLookupFunction;
+};
+
+#endif
--- a/MilliOhmMeter_FW/lib/oled/OLEDDisplayFonts.h
+++ b/MilliOhmMeter_FW/lib/oled/OLEDDisplayFonts.h
--- a/MilliOhmMeter_FW/lib/oled/OLEDDisplayUi.cpp
+++ b/MilliOhmMeter_FW/lib/oled/OLEDDisplayUi.cpp
@@ -0,0 +1,422 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
+ * Copyright (c) 2018 by Fabrice Weinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * ThingPulse invests considerable time and money to develop these open source libraries.
+ * Please support us by buying our products (and not the clones) from
+ * https://thingpulse.com
+ *
+ */
+
+#include "OLEDDisplayUi.h"
+
+OLEDDisplayUi::OLEDDisplayUi(OLEDDisplay *display) {
+  this->display = display;
+}
+
+void OLEDDisplayUi::init() {
+  this->display->init();
+}
+
+void OLEDDisplayUi::setTargetFPS(uint8_t fps){
+  float oldInterval = this->updateInterval;
+  this->updateInterval = ((float) 1.0 / (float) fps) * 1000;
+
+  // Calculate new ticksPerFrame
+  float changeRatio = oldInterval / (float) this->updateInterval;
+  this->ticksPerFrame *= changeRatio;
+  this->ticksPerTransition *= changeRatio;
+}
+
+// -/------ Automatic controll ------\-
+
+void OLEDDisplayUi::enableAutoTransition(){
+  this->autoTransition = true;
+}
+void OLEDDisplayUi::disableAutoTransition(){
+  this->autoTransition = false;
+}
+void OLEDDisplayUi::setAutoTransitionForwards(){
+  this->state.frameTransitionDirection = 1;
+  this->lastTransitionDirection = 1;
+}
+void OLEDDisplayUi::setAutoTransitionBackwards(){
+  this->state.frameTransitionDirection = -1;
+  this->lastTransitionDirection = -1;
+}
+void OLEDDisplayUi::setTimePerFrame(uint16_t time){
+  this->ticksPerFrame = (uint16_t) ( (float) time / (float) updateInterval);
+}
+void OLEDDisplayUi::setTimePerTransition(uint16_t time){
+  this->ticksPerTransition = (uint16_t) ( (float) time / (float) updateInterval);
+}
+
+// -/------ Customize indicator position and style -------\-
+void OLEDDisplayUi::enableIndicator(){
+  this->state.isIndicatorDrawen = true;
+}
+
+void OLEDDisplayUi::disableIndicator(){
+  this->state.isIndicatorDrawen = false;
+}
+
+void OLEDDisplayUi::enableAllIndicators(){
+  this->shouldDrawIndicators = true;
+}
+
+void OLEDDisplayUi::disableAllIndicators(){
+  this->shouldDrawIndicators = false;
+}
+
+void OLEDDisplayUi::setIndicatorPosition(IndicatorPosition pos) {
+  this->indicatorPosition = pos;
+}
+void OLEDDisplayUi::setIndicatorDirection(IndicatorDirection dir) {
+  this->indicatorDirection = dir;
+}
+void OLEDDisplayUi::setActiveSymbol(const uint8_t* symbol) {
+  this->activeSymbol = symbol;
+}
+void OLEDDisplayUi::setInactiveSymbol(const uint8_t* symbol) {
+  this->inactiveSymbol = symbol;
+}
+
+
+// -/----- Frame settings -----\-
+void OLEDDisplayUi::setFrameAnimation(AnimationDirection dir) {
+  this->frameAnimationDirection = dir;
+}
+void OLEDDisplayUi::setFrames(FrameCallback* frameFunctions, uint8_t frameCount) {
+  this->frameFunctions = frameFunctions;
+  this->frameCount     = frameCount;
+  this->resetState();
+}
+
+// -/----- Overlays ------\-
+void OLEDDisplayUi::setOverlays(OverlayCallback* overlayFunctions, uint8_t overlayCount){
+  this->overlayFunctions = overlayFunctions;
+  this->overlayCount     = overlayCount;
+}
+
+// -/----- Loading Process -----\-
+
+void OLEDDisplayUi::setLoadingDrawFunction(LoadingDrawFunction loadingDrawFunction) {
+  this->loadingDrawFunction = loadingDrawFunction;
+}
+
+void OLEDDisplayUi::runLoadingProcess(LoadingStage* stages, uint8_t stagesCount) {
+  uint8_t progress = 0;
+  uint8_t increment = 100 / stagesCount;
+
+  for (uint8_t i = 0; i < stagesCount; i++) {
+    display->clear();
+    this->loadingDrawFunction(this->display, &stages[i], progress);
+    display->display();
+
+    stages[i].callback();
+
+    progress += increment;
+    yield();
+  }
+
+  display->clear();
+  this->loadingDrawFunction(this->display, &stages[stagesCount-1], progress);
+  display->display();
+
+  delay(150);
+}
+
+// -/----- Manuel control -----\-
+void OLEDDisplayUi::nextFrame() {
+  if (this->state.frameState != IN_TRANSITION) {
+    this->state.manuelControll = true;
+    this->state.frameState = IN_TRANSITION;
+    this->state.ticksSinceLastStateSwitch = 0;
+    this->lastTransitionDirection = this->state.frameTransitionDirection;
+    this->state.frameTransitionDirection = 1;
+  }
+}
+void OLEDDisplayUi::previousFrame() {
+  if (this->state.frameState != IN_TRANSITION) {
+    this->state.manuelControll = true;
+    this->state.frameState = IN_TRANSITION;
+    this->state.ticksSinceLastStateSwitch = 0;
+    this->lastTransitionDirection = this->state.frameTransitionDirection;
+    this->state.frameTransitionDirection = -1;
+  }
+}
+
+void OLEDDisplayUi::switchToFrame(uint8_t frame) {
+  if (frame >= this->frameCount) return;
+  this->state.ticksSinceLastStateSwitch = 0;
+  if (frame == this->state.currentFrame) return;
+  this->state.frameState = FIXED;
+  this->state.currentFrame = frame;
+  this->state.isIndicatorDrawen = true;
+}
+
+void OLEDDisplayUi::transitionToFrame(uint8_t frame) {
+  if (frame >= this->frameCount) return;
+  this->state.ticksSinceLastStateSwitch = 0;
+  if (frame == this->state.currentFrame) return;
+  this->nextFrameNumber = frame;
+  this->lastTransitionDirection = this->state.frameTransitionDirection;
+  this->state.manuelControll = true;
+  this->state.frameState = IN_TRANSITION;
+  this->state.frameTransitionDirection = frame < this->state.currentFrame ? -1 : 1;
+}
+
+
+// -/----- State information -----\-
+OLEDDisplayUiState* OLEDDisplayUi::getUiState(){
+  return &this->state;
+}
+
+
+int8_t OLEDDisplayUi::update(){
+  unsigned long frameStart = millis();
+  int8_t timeBudget = this->updateInterval - (frameStart - this->state.lastUpdate);
+  if ( timeBudget <= 0) {
+    // Implement frame skipping to ensure time budget is keept
+    if (this->autoTransition && this->state.lastUpdate != 0) this->state.ticksSinceLastStateSwitch += ceil(-timeBudget / this->updateInterval);
+
+    this->state.lastUpdate = frameStart;
+    this->tick();
+  }
+  return this->updateInterval - (millis() - frameStart);
+}
+
+
+void OLEDDisplayUi::tick() {
+  this->state.ticksSinceLastStateSwitch++;
+
+  switch (this->state.frameState) {
+    case IN_TRANSITION:
+        if (this->state.ticksSinceLastStateSwitch >= this->ticksPerTransition){
+          this->state.frameState = FIXED;
+          this->state.currentFrame = getNextFrameNumber();
+          this->state.ticksSinceLastStateSwitch = 0;
+          this->nextFrameNumber = -1;
+        }
+      break;
+    case FIXED:
+      // Revert manuelControll
+      if (this->state.manuelControll) {
+        this->state.frameTransitionDirection = this->lastTransitionDirection;
+        this->state.manuelControll = false;
+      }
+      if (this->state.ticksSinceLastStateSwitch >= this->ticksPerFrame){
+          if (this->autoTransition){
+            this->state.frameState = IN_TRANSITION;
+          }
+          this->state.ticksSinceLastStateSwitch = 0;
+      }
+      break;
+  }
+
+  this->display->clear();
+  this->drawFrame();
+  if (shouldDrawIndicators) {
+    this->drawIndicator();
+  }
+  this->drawOverlays();
+  this->display->display();
+}
+
+void OLEDDisplayUi::resetState() {
+  this->state.lastUpdate = 0;
+  this->state.ticksSinceLastStateSwitch = 0;
+  this->state.frameState = FIXED;
+  this->state.currentFrame = 0;
+  this->state.isIndicatorDrawen = true;
+}
+
+void OLEDDisplayUi::drawFrame(){
+  switch (this->state.frameState){
+     case IN_TRANSITION: {
+       float progress = (float) this->state.ticksSinceLastStateSwitch / (float) this->ticksPerTransition;
+       int16_t x = 0, y = 0, x1 = 0, y1 = 0;
+       switch(this->frameAnimationDirection){
+        case SLIDE_LEFT:
+          x = -this->display->width() * progress;
+          y = 0;
+          x1 = x + this->display->width();
+          y1 = 0;
+          break;
+        case SLIDE_RIGHT:
+          x = this->display->width() * progress;
+          y = 0;
+          x1 = x - this->display->width();
+          y1 = 0;
+          break;
+        case SLIDE_UP:
+          x = 0;
+          y = -this->display->height() * progress;
+          x1 = 0;
+          y1 = y + this->display->height();
+          break;
+        case SLIDE_DOWN:
+        default:
+          x = 0;
+          y = this->display->height() * progress;
+          x1 = 0;
+          y1 = y - this->display->height();
+          break;
+       }
+
+       // Invert animation if direction is reversed.
+       int8_t dir = this->state.frameTransitionDirection >= 0 ? 1 : -1;
+       x *= dir; y *= dir; x1 *= dir; y1 *= dir;
+
+       bool drawenCurrentFrame;
+
+
+       // Prope each frameFunction for the indicator Drawen state
+       this->enableIndicator();
+       (this->frameFunctions[this->state.currentFrame])(this->display, &this->state, x, y);
+       drawenCurrentFrame = this->state.isIndicatorDrawen;
+
+       this->enableIndicator();
+       (this->frameFunctions[this->getNextFrameNumber()])(this->display, &this->state, x1, y1);
+
+       // Build up the indicatorDrawState
+       if (drawenCurrentFrame && !this->state.isIndicatorDrawen) {
+         // Drawen now but not next
+         this->indicatorDrawState = 2;
+       } else if (!drawenCurrentFrame && this->state.isIndicatorDrawen) {
+         // Not drawen now but next
+         this->indicatorDrawState = 1;
+       } else if (!drawenCurrentFrame && !this->state.isIndicatorDrawen) {
+         // Not drawen in both frames
+         this->indicatorDrawState = 3;
+       }
+
+       // If the indicator isn't draw in the current frame
+       // reflect it in state.isIndicatorDrawen
+       if (!drawenCurrentFrame) this->state.isIndicatorDrawen = false;
+
+       break;
+     }
+     case FIXED:
+      // Always assume that the indicator is drawn!
+      // And set indicatorDrawState to "not known yet"
+      this->indicatorDrawState = 0;
+      this->enableIndicator();
+      (this->frameFunctions[this->state.currentFrame])(this->display, &this->state, 0, 0);
+      break;
+  }
+}
+
+void OLEDDisplayUi::drawIndicator() {
+
+    // Only draw if the indicator is invisible
+    // for both frames or
+    // the indiactor is shown and we are IN_TRANSITION
+    if (this->indicatorDrawState == 3 || (!this->state.isIndicatorDrawen && this->state.frameState != IN_TRANSITION)) {
+      return;
+    }
+
+    uint8_t posOfHighlightFrame = 0;
+    float indicatorFadeProgress = 0;
+
+    // if the indicator needs to be slided in we want to
+    // highlight the next frame in the transition
+    uint8_t frameToHighlight = this->indicatorDrawState == 1 ? this->getNextFrameNumber() : this->state.currentFrame;
+
+    // Calculate the frame that needs to be highlighted
+    // based on the Direction the indiactor is drawn
+    switch (this->indicatorDirection){
+      case LEFT_RIGHT:
+        posOfHighlightFrame = frameToHighlight;
+        break;
+      case RIGHT_LEFT:
+      default:
+        posOfHighlightFrame = this->frameCount - frameToHighlight;
+        break;
+    }
+
+    switch (this->indicatorDrawState) {
+      case 1: // Indicator was not drawn in this frame but will be in next
+        // Slide IN
+        indicatorFadeProgress = 1 - ((float) this->state.ticksSinceLastStateSwitch / (float) this->ticksPerTransition);
+        break;
+      case 2: // Indicator was drawn in this frame but not in next
+        // Slide OUT
+        indicatorFadeProgress = ((float) this->state.ticksSinceLastStateSwitch / (float) this->ticksPerTransition);
+        break;
+    }
+
+    //Space between indicators - reduce for small screen sizes
+    uint16_t indicatorSpacing = 12;
+    if (this->display->getHeight() < 64 && (this->indicatorPosition == RIGHT || this->indicatorPosition == LEFT)) {
+      indicatorSpacing = 6;
+    }
+
+    uint16_t frameStartPos = (indicatorSpacing * frameCount / 2);
+    const uint8_t *image;
+
+    uint16_t x = 0,y = 0;
+
+
+    for (byte i = 0; i < this->frameCount; i++) {
+
+      switch (this->indicatorPosition){
+        case TOP:
+          y = 0 - (8 * indicatorFadeProgress);
+          x = (this->display->width() / 2) - frameStartPos + 12 * i;
+          break;
+        case BOTTOM:
+          y = (this->display->height() - 8) + (8 * indicatorFadeProgress);
+          x = (this->display->width() / 2) - frameStartPos + 12 * i;
+          break;
+        case RIGHT:
+          x = (this->display->width() - 8) + (8 * indicatorFadeProgress);
+          y = (this->display->height() / 2) - frameStartPos + 2 + 12 * i;
+          break;
+        case LEFT:
+        default:
+          x = 0 - (8 * indicatorFadeProgress);
+          y = (this->display->height() / 2) - frameStartPos + 2 + indicatorSpacing * i;
+          break;
+      }
+
+      if (posOfHighlightFrame == i) {
+         image = this->activeSymbol;
+      } else {
+         image = this->inactiveSymbol;
+      }
+
+      this->display->drawFastImage(x, y, 8, 8, image);
+    }
+}
+
+void OLEDDisplayUi::drawOverlays() {
+ for (uint8_t i=0;i<this->overlayCount;i++){
+    (this->overlayFunctions[i])(this->display, &this->state);
+ }
+}
+
+uint8_t OLEDDisplayUi::getNextFrameNumber(){
+  if (this->nextFrameNumber != -1) return this->nextFrameNumber;
+  return (this->state.currentFrame + this->frameCount + this->state.frameTransitionDirection) % this->frameCount;
+}
--- a/MilliOhmMeter_FW/lib/oled/OLEDDisplayUi.h
+++ b/MilliOhmMeter_FW/lib/oled/OLEDDisplayUi.h
@@ -0,0 +1,309 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
+ * Copyright (c) 2018 by Fabrice Weinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * ThingPulse invests considerable time and money to develop these open source libraries.
+ * Please support us by buying our products (and not the clones) from
+ * https://thingpulse.com
+ *
+ */
+
+#ifndef OLEDDISPLAYUI_h
+#define OLEDDISPLAYUI_h
+
+#include <Arduino.h>
+#include "OLEDDisplay.h"
+
+//#define DEBUG_OLEDDISPLAYUI(...) Serial.printf( __VA_ARGS__ )
+
+#ifndef DEBUG_OLEDDISPLAYUI
+#define DEBUG_OLEDDISPLAYUI(...)
+#endif
+
+enum AnimationDirection {
+  SLIDE_UP,
+  SLIDE_DOWN,
+  SLIDE_LEFT,
+  SLIDE_RIGHT
+};
+
+enum IndicatorPosition {
+  TOP,
+  RIGHT,
+  BOTTOM,
+  LEFT
+};
+
+enum IndicatorDirection {
+  LEFT_RIGHT,
+  RIGHT_LEFT
+};
+
+enum FrameState {
+  IN_TRANSITION,
+  FIXED
+};
+
+
+const uint8_t ANIMATION_activeSymbol[] PROGMEM = {
+  0x00, 0x18, 0x3c, 0x7e, 0x7e, 0x3c, 0x18, 0x00
+};
+
+const uint8_t ANIMATION_inactiveSymbol[] PROGMEM = {
+  0x00, 0x0, 0x0, 0x18, 0x18, 0x0, 0x0, 0x00
+};
+
+
+// Structure of the UiState
+struct OLEDDisplayUiState {
+  uint64_t     lastUpdate                = 0;
+  uint16_t      ticksSinceLastStateSwitch = 0;
+
+  FrameState    frameState                = FIXED;
+  uint8_t       currentFrame              = 0;
+
+  bool          isIndicatorDrawen         = true;
+
+  // Normal = 1, Inverse = -1;
+  int8_t        frameTransitionDirection  = 1;
+
+  bool          manuelControll            = false;
+
+  // Custom data that can be used by the user
+  void*         userData                  = NULL;
+};
+
+struct LoadingStage {
+  const char* process;
+  void (*callback)();
+};
+
+typedef void (*FrameCallback)(OLEDDisplay *display,  OLEDDisplayUiState* state, int16_t x, int16_t y);
+typedef void (*OverlayCallback)(OLEDDisplay *display,  OLEDDisplayUiState* state);
+typedef void (*LoadingDrawFunction)(OLEDDisplay *display, LoadingStage* stage, uint8_t progress);
+
+class OLEDDisplayUi {
+  private:
+    OLEDDisplay             *display;
+
+    // Symbols for the Indicator
+    IndicatorPosition   indicatorPosition         = BOTTOM;
+    IndicatorDirection  indicatorDirection        = LEFT_RIGHT;
+
+    const uint8_t*         activeSymbol              = ANIMATION_activeSymbol;
+    const uint8_t*         inactiveSymbol            = ANIMATION_inactiveSymbol;
+
+    bool                shouldDrawIndicators      = true;
+
+    // Values for the Frames
+    AnimationDirection  frameAnimationDirection   = SLIDE_RIGHT;
+
+    int8_t              lastTransitionDirection   = 1;
+
+    uint16_t            ticksPerFrame             = 151; // ~ 5000ms at 30 FPS
+    uint16_t            ticksPerTransition        = 15;  // ~  500ms at 30 FPS
+
+    bool                autoTransition            = true;
+
+    FrameCallback*      frameFunctions;
+    uint8_t             frameCount                = 0;
+
+    // Internally used to transition to a specific frame
+    int8_t              nextFrameNumber           = -1;
+
+    // Values for Overlays
+    OverlayCallback*    overlayFunctions;
+    uint8_t             overlayCount              = 0;
+
+    // Will the Indicator be drawen
+    // 3 Not drawn in both frames
+    // 2 Drawn this frame but not next
+    // 1 Not drown this frame but next
+    // 0 Not known yet
+    uint8_t                indicatorDrawState        = 1;
+
+    // Loading screen
+    LoadingDrawFunction loadingDrawFunction       = [](OLEDDisplay *display, LoadingStage* stage, uint8_t progress) {
+      display->setTextAlignment(TEXT_ALIGN_CENTER);
+      display->setFont(ArialMT_Plain_10);
+      display->drawString(64, 18, stage->process);
+      display->drawProgressBar(4, 32, 120, 8, progress);
+    };
+
+    // UI State
+    OLEDDisplayUiState      state;
+
+    // Bookeeping for update
+    uint8_t             updateInterval            = 33;
+
+    uint8_t             getNextFrameNumber();
+    void                drawIndicator();
+    void                drawFrame();
+    void                drawOverlays();
+    void                tick();
+    void                resetState();
+
+  public:
+
+    OLEDDisplayUi(OLEDDisplay *display);
+
+    /**
+     * Initialise the display
+     */
+    void init();
+
+    /**
+     * Configure the internal used target FPS
+     */
+    void setTargetFPS(uint8_t fps);
+
+    // Automatic Controll
+    /**
+     * Enable automatic transition to next frame after the some time can be configured with `setTimePerFrame` and `setTimePerTransition`.
+     */
+    void enableAutoTransition();
+
+    /**
+     * Disable automatic transition to next frame.
+     */
+    void disableAutoTransition();
+
+    /**
+     * Set the direction if the automatic transitioning
+     */
+    void setAutoTransitionForwards();
+    void setAutoTransitionBackwards();
+
+    /**
+     *  Set the approx. time a frame is displayed
+     */
+    void setTimePerFrame(uint16_t time);
+
+    /**
+     * Set the approx. time a transition will take
+     */
+    void setTimePerTransition(uint16_t time);
+
+    // Customize indicator position and style
+
+    /**
+     * Draw the indicator.
+     * This is the defaut state for all frames if
+     * the indicator was hidden on the previous frame
+     * it will be slided in.
+     */
+    void enableIndicator();
+
+    /**
+     * Don't draw the indicator.
+     * This will slide out the indicator
+     * when transitioning to the next frame.
+     */
+    void disableIndicator();
+
+    /**
+     * Enable drawing of indicators
+     */
+    void enableAllIndicators();
+
+    /**
+     * Disable draw of indicators.
+     */
+    void disableAllIndicators();
+
+    /**
+     * Set the position of the indicator bar.
+     */
+    void setIndicatorPosition(IndicatorPosition pos);
+
+    /**
+     * Set the direction of the indicator bar. Defining the order of frames ASCENDING / DESCENDING
+     */
+    void setIndicatorDirection(IndicatorDirection dir);
+
+    /**
+     * Set the symbol to indicate an active frame in the indicator bar.
+     */
+    void setActiveSymbol(const uint8_t* symbol);
+
+    /**
+     * Set the symbol to indicate an inactive frame in the indicator bar.
+     */
+    void setInactiveSymbol(const uint8_t* symbol);
+
+
+    // Frame settings
+
+    /**
+     * Configure what animation is used to transition from one frame to another
+     */
+    void setFrameAnimation(AnimationDirection dir);
+
+    /**
+     * Add frame drawing functions
+     */
+    void setFrames(FrameCallback* frameFunctions, uint8_t frameCount);
+
+    // Overlay
+
+    /**
+     * Add overlays drawing functions that are draw independent of the Frames
+     */
+    void setOverlays(OverlayCallback* overlayFunctions, uint8_t overlayCount);
+
+
+    // Loading animation
+    /**
+     * Set the function that will draw each step
+     * in the loading animation
+     */
+    void setLoadingDrawFunction(LoadingDrawFunction loadingFunction);
+
+
+    /**
+     * Run the loading process
+     */
+    void runLoadingProcess(LoadingStage* stages, uint8_t stagesCount);
+
+
+    // Manual Control
+    void nextFrame();
+    void previousFrame();
+
+    /**
+     * Switch without transition to frame `frame`.
+     */
+    void switchToFrame(uint8_t frame);
+
+    /**
+     * Transition to frame `frame`, when the `frame` number is bigger than the current
+     * frame the forward animation will be used, otherwise the backwards animation is used.
+     */
+    void transitionToFrame(uint8_t frame);
+
+    // State Info
+    OLEDDisplayUiState* getUiState();
+
+    int8_t update();
+};
+#endif
--- a/MilliOhmMeter_FW/lib/oled/SSD1306.h
+++ b/MilliOhmMeter_FW/lib/oled/SSD1306.h
@@ -0,0 +1,39 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
+ * Copyright (c) 2018 by Fabrice Weinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * ThingPulse invests considerable time and money to develop these open source libraries.
+ * Please support us by buying our products (and not the clones) from
+ * https://thingpulse.com
+ *
+ */
+
+#ifndef SSD1306_h
+#define SSD1306_h
+#include "SSD1306Wire.h"
+
+// For legacy support make SSD1306 an alias for SSD1306
+typedef SSD1306Wire SSD1306;
+
+
+#endif
--- a/MilliOhmMeter_FW/lib/oled/SSD1306Wire.h
+++ b/MilliOhmMeter_FW/lib/oled/SSD1306Wire.h
@@ -0,0 +1,305 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
+ * Copyright (c) 2018 by Fabrice Weinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * ThingPulse invests considerable time and money to develop these open source libraries.
+ * Please support us by buying our products (and not the clones) from
+ * https://thingpulse.com
+ *
+ */
+
+#ifndef SSD1306Wire_h
+#define SSD1306Wire_h
+
+#include "OLEDDisplay.h"
+#include <Wire.h>
+
+
+class SSD1306Wire : public OLEDDisplay {
+  private:
+      uint8_t             _address;
+      uint8_t             _sda;
+      uint8_t             _scl;
+      uint8_t             _rst;
+      bool                _doI2cAutoInit = false;
+
+  public:
+    SSD1306Wire(uint8_t _address, uint8_t _sda, uint8_t _scl, uint8_t _rst, OLEDDISPLAY_GEOMETRY g = GEOMETRY_128_64) {
+      setGeometry(g);
+
+      this->_address = _address;
+      this->_sda = _sda;
+      this->_scl = _scl;
+      this->_rst = _rst;
+    }
+
+
+    bool connect() {
+    		pinMode(_rst,OUTPUT);
+    		digitalWrite(_rst, LOW);
+    		delay(50);
+    		digitalWrite(_rst, HIGH);
+
+		Wire.begin(this->_sda, this->_scl);
+		// Let's use ~700khz if ESP8266 is in 160Mhz mode
+		// this will be limited to ~400khz if the ESP8266 in 80Mhz mode.
+		Wire.setClock(700000);
+		return true;
+    }
+
+    void display(void) {
+		initI2cIfNeccesary();
+		if(rotate_angle==ANGLE_0_DEGREE||rotate_angle==ANGLE_180_DEGREE)
+		{
+			const int x_offset = (128 - this->width()) / 2;
+		#ifdef OLEDDISPLAY_DOUBLE_BUFFER
+			uint8_t minBoundY = UINT8_MAX;
+			uint8_t maxBoundY = 0;
+
+			uint8_t minBoundX = UINT8_MAX;
+			uint8_t maxBoundX = 0;
+			uint8_t x, y;
+
+			// Calculate the Y bounding box of changes
+			// and copy buffer[pos] to buffer_back[pos];
+			for (y = 0; y < (this->height() / 8); y++)
+			{
+				for (x = 0; x < this->width(); x++)
+				{
+					uint16_t pos = x + y * this->width();
+					if (buffer[pos] != buffer_back[pos]) 
+					{
+						minBoundY = _min(minBoundY, y);
+						maxBoundY = _max(maxBoundY, y);
+						minBoundX = _min(minBoundX, x);
+						maxBoundX = _max(maxBoundX, x);
+					}
+					buffer_back[pos] = buffer[pos];
+				}
+				//yield();
+			}
+
+			// If the minBoundY wasn't updated
+			// we can savely assume that buffer_back[pos] == buffer[pos]
+			// holdes true for all values of pos
+
+			if (minBoundY == UINT8_MAX) return;
+
+			sendCommand(COLUMNADDR);
+			sendCommand(x_offset+minBoundX);
+			sendCommand(x_offset+ maxBoundX);
+
+			sendCommand(PAGEADDR);
+			sendCommand(minBoundY);
+			sendCommand(maxBoundY);
+
+			byte k = 0;
+			for (y = minBoundY; y <= maxBoundY; y++)
+			{
+				for (x = minBoundX; x <= maxBoundX; x++)
+				{
+					if (k == 0)
+					{
+						Wire.beginTransmission(_address);
+						Wire.write(0x40);
+					}
+
+					Wire.write(buffer[x + y * this->width()]);
+					k++;
+					if (k == 16)
+					{
+						Wire.endTransmission();
+						k = 0;
+					}
+				}
+				//yield();
+			}
+
+			if (k != 0) {
+				Wire.endTransmission();
+			}
+		#else
+
+			sendCommand(COLUMNADDR);
+			sendCommand(x_offset);
+			sendCommand(x_offset+(this->width() - 1));
+
+			sendCommand(PAGEADDR);
+			sendCommand(0x0);
+			sendCommand((this->height() / 8) - 1);
+
+			if (geometry == GEOMETRY_128_64)
+			{
+				sendCommand(0x7);
+			}
+			else if (geometry == GEOMETRY_128_32)
+			{
+				sendCommand(0x3);
+			}
+
+			for (uint16_t i=0; i < displayBufferSize; i++)
+			{
+				Wire.beginTransmission(this->_address);
+				Wire.write(0x40);
+				for (uint8_t x = 0; x < 16; x++)
+				{
+					Wire.write(buffer[i]);
+					i++;
+				}
+				i--;
+				Wire.endTransmission();
+			}
+		#endif
+		}
+		else
+		{
+			uint8_t buffer_rotate[displayBufferSize];
+			memset(buffer_rotate,0,displayBufferSize);
+			uint8_t temp;
+			for(uint16_t i=0;i<this->width();i++)
+			{
+				for(uint16_t j=0;j<this->height();j++)
+				{
+					temp = buffer[(j>>3)*this->width()+i]>>(j&7)&0x01;
+					buffer_rotate[(i>>3)*this->height()+j]|=(temp<<(i&7));
+				}
+			}
+		#ifdef OLEDDISPLAY_DOUBLE_BUFFER
+			uint8_t minBoundY = UINT8_MAX;
+			uint8_t maxBoundY = 0;
+			 
+			uint8_t minBoundX = UINT8_MAX;
+			uint8_t maxBoundX = 0;
+			uint8_t x, y;
+			const int x_offset = (128 - this->height()) / 2;
+			// Calculate the Y bounding box of changes
+			// and copy buffer[pos] to buffer_back[pos];
+			for (y = 0; y < (this->width() / 8); y++)
+			{
+				for (x = 0; x < this->height(); x++)
+				{
+					uint16_t pos = x + y * this->height();
+					if (buffer_rotate[pos] != buffer_back[pos])
+					{
+						minBoundY = _min(minBoundY, y);
+						maxBoundY = _max(maxBoundY, y);
+						minBoundX = _min(minBoundX, x);
+						maxBoundX = _max(maxBoundX, x);
+					}
+					buffer_back[pos] = buffer_rotate[pos];
+				}
+				//yield();
+			}
+			if (minBoundY == UINT8_MAX) return;
+
+			sendCommand(COLUMNADDR);
+			sendCommand(x_offset+minBoundX);
+			sendCommand(x_offset+maxBoundX);
+
+			sendCommand(PAGEADDR);
+			sendCommand(minBoundY);
+			sendCommand(maxBoundY);
+
+			byte k = 0;
+			for (y = minBoundY; y <= maxBoundY; y++)
+			{
+				for (x = minBoundX; x <= maxBoundX; x++)
+				{
+					if (k == 0)
+					{
+						Wire.beginTransmission(_address);
+						Wire.write(0x40);
+					}
+
+					Wire.write(buffer_rotate[x + y * this->height()]);
+					k++;
+					if (k == 16)
+					{
+						Wire.endTransmission();
+						k = 0;
+					}
+				}
+				//yield();
+			}
+
+			if (k != 0) {
+				Wire.endTransmission();
+			}
+		#else
+			sendCommand(COLUMNADDR);
+			sendCommand(x_offset);
+			sendCommand(x_offset+(this->height() - 1));
+
+			sendCommand(PAGEADDR);
+			sendCommand(0x0);
+			sendCommand((this->width() / 8) - 1);
+			if (geometry == GEOMETRY_128_64)
+			{
+				sendCommand(0x7);
+			}
+			else if (geometry == GEOMETRY_128_32)
+			{
+				sendCommand(0x3);
+			}
+
+			for (uint16_t i=0; i < displayBufferSize; i++)
+			{
+				Wire.beginTransmission(this->_address);
+				Wire.write(0x40);
+				for (uint8_t x = 0; x < 16; x++)
+				{
+					Wire.write(buffer_rotate[i]);
+					i++;
+				}
+				i--;
+				Wire.endTransmission();
+			}
+		#endif
+		}
+	}
+
+    void setI2cAutoInit(bool doI2cAutoInit) {
+      _doI2cAutoInit = doI2cAutoInit;
+    }
+
+  private:
+	int getBufferOffset(void) {
+		return 0;
+	}
+    inline void sendCommand(uint8_t command) __attribute__((always_inline)){
+      initI2cIfNeccesary();
+      Wire.beginTransmission(_address);
+      Wire.write(0x80);
+      Wire.write(command);
+      Wire.endTransmission();
+    }
+
+    void initI2cIfNeccesary() {
+      if (_doI2cAutoInit) {
+        Wire.begin(this->_sda, this->_scl);
+      }
+    }
+
+};
+
+#endif
--- a/MilliOhmMeter_FW/platformio.ini
+++ b/MilliOhmMeter_FW/platformio.ini
@@ -0,0 +1,17 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:heltec_wifi_lora_32_V2]
+platform = espressif32
+board = heltec_wifi_lora_32_V2
+framework = arduino
+monitor_speed = 115200
+lib_deps = 
+  #heltecautomation/Heltec ESP32 Dev-Boards@^1.1.0
--- a/MilliOhmMeter_FW/src/board.cpp
+++ b/MilliOhmMeter_FW/src/board.cpp
@@ -0,0 +1,18 @@
+#include "board.h"
+#include "Arduino.h"
+
+void VextOn(void)
+{
+  //Heltec.begin(true,false,true);
+	pinMode(Vext,OUTPUT);
+	digitalWrite(Vext, LOW);
+}
+
+void initBoard(void)
+{
+  Serial.begin(115200);
+  Serial.flush();
+  Serial.print("Init Board: ");
+  VextOn();
+  Serial.println("OK");
+}
--- a/MilliOhmMeter_FW/src/board.h
+++ b/MilliOhmMeter_FW/src/board.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void initBoard(void);
--- a/MilliOhmMeter_FW/src/display.cpp
+++ b/MilliOhmMeter_FW/src/display.cpp
@@ -0,0 +1,210 @@
+#include "display.h"
+
+SSD1306Wire display(0x3c, SDA_OLED, SCL_OLED, RST_OLED, GEOMETRY_128_64);
+;
+OLEDDisplayUi ui(&display);
+displayState displaystate = mainscreen;
+bool stateMutex = true;
+
+String measureModes[4] = {"20mA", "200mA", "1000mA", "Auto"};
+uint8_t measureModePos[4] = {2, 34, 66, 98};
+uint8_t measureModeCenter[4] = {16, 48, 80, 112};
+
+void drawWifiSymbol(OLEDDisplay *display, OLEDDisplayUiState *state)
+{
+}
+
+c_displayMeasureMode ma20(mA20, 16, 32, "20m");
+c_displayMeasureMode ma200(mA200, 48, 32, "200m");
+c_displayMeasureMode ma1000(mA1000, 80, 32, "1A");
+c_displayMeasureMode mauto(mAuto, 112, 32, "Auto");
+
+std::vector<c_displayMeasureMode> modes;
+
+void initModes(void)
+{
+  modes.push_back(ma20);
+  modes.push_back(ma200);
+  modes.push_back(ma1000);
+  modes.push_back(mauto);
+}
+
+void c_displayMeasureMode::drawMeasureMode(OLEDDisplay *display, measureMode mode, int16_t x, int16_t y)
+{
+  display->setFont(ArialMT_Plain_10);
+  display->setTextAlignment(TEXT_ALIGN_CENTER);
+  display->drawString(x + _xpos, y + CONTROLSTRIP_YPOS, _name);
+  if (mode == _mode)
+  {
+    display->drawRect(x + (_xpos - (_width / 2)), y + CONTROLSLINE_YPOS, CONTROLSLINE_W, CONTROLSLINE_H);
+  }
+  else
+  {
+    display->fillRect(x + (_xpos - (_width / 2)), y + CONTROLSLINE_YPOS, CONTROLSLINE_W, CONTROLSLINE_H);
+  }
+}
+
+String showValue(String designator, double value, String unit)
+{
+  String text;
+  text.clear();
+  if (designator != "")
+  {
+    text = designator;
+  }
+  text += value;
+  text += unit;
+  return text;
+}
+
+void drawMeasurementValues(OLEDDisplay *display, int16_t x, int16_t y)
+{
+  display->setFont(ArialMT_Plain_10);
+  display->setTextAlignment(TEXT_ALIGN_LEFT);
+  display->drawString(x + 0, y + 0, showValue("m:", getMin(), ""));
+  display->setTextAlignment(TEXT_ALIGN_CENTER);
+  display->drawString(x + 64, y + 0, showValue("r:", getRms(), ""));
+  display->setTextAlignment(TEXT_ALIGN_RIGHT);
+  display->drawString(x + 128, y + 0, showValue("m:", getMax(), ""));
+
+  display->setFont(ArialMT_Plain_24);
+  display->setTextAlignment(TEXT_ALIGN_CENTER);
+
+  display->drawString(x + 64, y + 12, showValue("", getValue(), "mE"));
+  display->drawProgressBar(x + 0, y + 40, 127, 5, getBar());
+}
+
+void drawButtons(OLEDDisplay *display, int16_t x, int16_t y)
+{
+  //draw controlstrip indicators
+  measureMode currentMode = getMeasureMode();
+
+  for (auto &&thismode : modes)
+  {
+    thismode.drawMeasureMode(display, currentMode, x, y);
+  }
+}
+
+int screenW = 128;
+int screenH = 64;
+int clockCenterX = screenW / 2;
+int clockCenterY = ((screenH - 16) / 2) + 16; // top yellow part is 16 px height
+int clockRadius = 23;
+
+void drawMeasurementDail(OLEDDisplay *display, int16_t x, int16_t y)
+{
+  //fit half a circle on screen
+  display->drawCircleQuads(DAILCENTERX, DAILCENTERY, DAILRADIUS + 1, 0b0011);
+  display->drawCircleQuads(DAILCENTERX, DAILCENTERY, DAILRADIUS, 0b0011);
+
+  //draw outer ticks
+  for (int z = -90; z < 91; z = z + 30)
+  {
+    //Begin at 0° and stop at 360°
+    float angle = z;
+    angle = (angle / 57.29577951); //Convert degrees to radians
+    int x2 = (DAILCENTERX + (sin(angle) * DAILRADIUS));
+    int y2 = (DAILCENTERY - (cos(angle) * DAILRADIUS));
+    int x3 = (DAILCENTERX + (sin(angle) * (DAILRADIUS - 8)));
+    int y3 = (DAILCENTERY - (cos(angle) * (DAILRADIUS - 8)));
+    display->drawLine(x2 + x, y2 + y, x3 + x, y3 + y);
+  }
+  //draw inner Ticks
+  for (int z = -75; z < 76; z = z + 30)
+  {
+    //Begin at 0° and stop at 360°
+    float angle = z;
+    angle = (angle / 57.29577951); //Convert degrees to radians
+    int x2 = (DAILCENTERX + (sin(angle) * DAILRADIUS));
+    int y2 = (DAILCENTERY - (cos(angle) * DAILRADIUS));
+    int x3 = (DAILCENTERX + (sin(angle) * (DAILRADIUS - 4)));
+    int y3 = (DAILCENTERY - (cos(angle) * (DAILRADIUS - 4)));
+    display->drawLine(x2 + x, y2 + y, x3 + x, y3 + y);
+  }
+
+  // draw value
+  float angle = map(getValue(), 270, 90, 0, 100);
+  angle = (angle / 57.29577951); //Convert degrees to radians
+  int x3 = (DAILCENTERX + (sin(angle) * (DAILRADIUS - (DAILRADIUS / 5))));
+  int y3 = (DAILCENTERY - (cos(angle) * (DAILRADIUS - (DAILRADIUS / 5))));
+  display->drawLine(DAILCENTERX + x, DAILCENTERY + y, x3 + x, y3 + y);
+}
+
+void drawMainScreen(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y)
+{
+
+  if ((displaystate != mainscreen) && (x == 0))
+  {
+    Serial.printf("[%lu] display: DrawMainScreen\n", millis());
+    displaystate = mainscreen;
+  }
+
+  drawButtons(display, x, y);
+  //drawMeasurementValues(display, x, y);
+  drawMeasurementDail(display, x, y);
+}
+
+void drawSetupScreen(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y)
+{
+  // draw an xbm image.
+  // Please note that everything that should be transitioned
+  // needs to be drawn relative to x and y
+  display->setFont(ArialMT_Plain_16);
+  display->setTextAlignment(TEXT_ALIGN_CENTER);
+  display->drawString(x + 64, y + 0, "Setup screen");
+  if ((displaystate != setupscreen) && (x == 0))
+  {
+    Serial.printf("[%lu] display: DrawSetupScreen\n", millis());
+    displaystate = setupscreen;
+  }
+}
+
+FrameCallback frames[] = {drawMainScreen}; //, drawSetupScreen};
+int frameCount = 1;
+OverlayCallback overlays[] = {drawWifiSymbol};
+int overlaysCount = 1;
+bool displayInitDone = false;
+
+void initDisplay(void)
+{
+  Serial.print("Init Display: ");
+
+  initModes();
+
+  displayInitDone = true;
+
+  ui.setTargetFPS(30);
+
+  // You can change this to
+  // TOP, LEFT, BOTTOM, RIGHT
+  ui.setIndicatorPosition(BOTTOM);
+
+  // Defines where the first frame is located in the bar.
+  ui.setIndicatorDirection(LEFT_RIGHT);
+
+  // You can change the transition that is used
+  // SLIDE_LEFT, SLIDE_RIGHT, SLIDE_UP, SLIDE_DOWN
+  ui.setFrameAnimation(SLIDE_LEFT);
+
+  // Add frames
+  ui.setFrames(frames, frameCount);
+
+  // Add overlays
+  ui.setOverlays(overlays, overlaysCount);
+
+  ui.disableAllIndicators();
+  ui.disableAutoTransition();
+
+  // Initialising the UI will init the display too.
+  ui.init();
+  Serial.println(" OK");
+}
+
+void handleDisplay(void)
+{
+  if (!displayInitDone)
+    return;
+  int remainingTimeBudget = ui.update();
+
+  Serial.printf("DT=%u;", remainingTimeBudget);
+}
--- a/MilliOhmMeter_FW/src/display.h
+++ b/MilliOhmMeter_FW/src/display.h
@@ -0,0 +1,34 @@
+#pragma once
+#include "SSD1306Wire.h"
+#include "OLEDDisplayUi.h"
+#include "measure.h"
+
+#include "image.h"
+
+#define CONTROLSTRIP_YPOS 63 - 10 - 4
+#define CONTROLSLINE_YPOS 60
+#define CONTROLSLINE_H 4
+#define CONTROLSLINE_W 30
+#define DAILRADIUS 45
+#define DAILCENTERX 128/2
+#define DAILCENTERY DAILRADIUS+1
+
+enum displayState
+{
+  mainscreen,
+  setupscreen
+};
+
+class c_displayMeasureMode
+{
+public:
+  const measureMode _mode;
+  const uint16_t _xpos;
+  const uint16_t _width;
+  const String _name;
+  c_displayMeasureMode(measureMode mode, uint16_t xpos, uint16_t width, String name) : _mode(mode), _xpos(xpos), _width(width), _name(name) {}
+  void drawMeasureMode(OLEDDisplay *display, measureMode mode, int16_t x, int16_t y);
+};
+
+void initDisplay(void);
+void handleDisplay(void);
--- a/MilliOhmMeter_FW/src/image.h
+++ b/MilliOhmMeter_FW/src/image.h
@@ -0,0 +1,68 @@
+#include "Arduino.h"
+
+static const unsigned char PROGMEM VUMeter[] = { 
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x03, 0x00, 0x60, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00,
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+  0x00, 0x00, 0x00, 0x84, 0x02, 0x04, 0x0F, 0xFF, 0xFF, 0xC3, 0xE2, 0x04, 0x00, 0x00, 0x08, 0x00,
+  0x00, 0x00, 0x00, 0xC2, 0x01, 0x07, 0xF0, 0x00, 0x00, 0x3B, 0xFE, 0x08, 0x40, 0x40, 0x08, 0x00,
+  0x00, 0xFE, 0x00, 0x62, 0x01, 0xF8, 0x00, 0x00, 0x00, 0x03, 0xFF, 0xE8, 0x40, 0x80, 0x7F, 0x00,
+  0x00, 0x00, 0x00, 0x21, 0x1E, 0x00, 0x04, 0x00, 0x80, 0x00, 0x7F, 0xFE, 0x80, 0x80, 0x08, 0x00,
+  0x00, 0x00, 0x03, 0x31, 0xE0, 0x00, 0x04, 0x00, 0x80, 0x04, 0x01, 0xFF, 0xC1, 0x00, 0x08, 0x00,
+  0x00, 0x00, 0x07, 0x1E, 0x00, 0x40, 0x00, 0x00, 0x00, 0x04, 0x00, 0x1F, 0xFA, 0x00, 0x08, 0x00,
+  0x00, 0x00, 0x07, 0xF0, 0x00, 0x40, 0x3B, 0x07, 0x60, 0x00, 0x00, 0x01, 0xFF, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x34, 0x81, 0x90, 0xCC, 0xC0, 0x00, 0x3F, 0xC0, 0x00, 0x00,
+  0x00, 0x00, 0x0C, 0x00, 0x03, 0x30, 0x0C, 0x82, 0x90, 0x53, 0x20, 0x00, 0x07, 0xF8, 0x00, 0x00,
+  0x00, 0x00, 0x70, 0x40, 0x00, 0xC8, 0x3B, 0x02, 0x60, 0x53, 0x20, 0x00, 0x00, 0xFE, 0x00, 0x00,
+  0x00, 0x01, 0x80, 0x20, 0x01, 0xC8, 0x00, 0x00, 0x00, 0x4C, 0xC0, 0x00, 0x00, 0x3F, 0x80, 0x00,
+  0x00, 0x06, 0x00, 0x00, 0x03, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xE0, 0x00,
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+  0x00, 0x30, 0x00, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x00,
+  0x00, 0x00, 0x40, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0xA0, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x02, 0x02, 0x30, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x03, 0x06, 0x30, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x8C, 0x30, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x22, 0x00, 0x00, 0x00, 0x00, 0xD8, 0x30, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x70, 0x19, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x20, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
--- a/MilliOhmMeter_FW/src/leds.cpp
+++ b/MilliOhmMeter_FW/src/leds.cpp
@@ -0,0 +1,24 @@
+#include "leds.h"
+
+uint64_t lastLedTimer = 0;
+bool ledBlinkState = false;
+
+void initLeds(void)
+{
+  Serial.print("Init Leds: ");
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, ledBlinkState );
+  lastLedTimer = millis();
+  Serial.println("OK");
+}
+
+void handleLeds(void)
+{
+  uint64_t currentTime = millis();
+  if(currentTime - lastLedTimer > LEDINTERVAL)
+  {
+    digitalWrite(LED_BUILTIN, ledBlinkState);
+    ledBlinkState = !ledBlinkState;
+    lastLedTimer = currentTime;
+  } 
+}
--- a/MilliOhmMeter_FW/src/leds.h
+++ b/MilliOhmMeter_FW/src/leds.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "Arduino.h"
+#include "board.h"
+
+
+#define LEDINTERVAL 1000
+
+void initLeds(void);
+void handleLeds(void);
--- a/MilliOhmMeter_FW/src/main.cpp
+++ b/MilliOhmMeter_FW/src/main.cpp
@@ -0,0 +1,29 @@
+#include <Arduino.h>
+#include "board.h"
+#include "display.h"
+#include "leds.h"
+#include "measure.h"
+
+uint64_t looptime = 0;
+
+void setup()
+{
+  // put your setup code here, to run once:
+  initBoard();
+  initDisplay();
+  initLeds();
+  initMeasure();
+  looptime = millis();
+}
+
+void loop()
+{
+  // put your main code here, to run repeatedly:
+  looptime = micros();
+
+  handleDisplay();
+  handleLeds();
+  handleMeasure();
+
+  Serial.printf("T=%4.2f\n", (double)(micros() - looptime)/1000);
+}
--- a/MilliOhmMeter_FW/src/measure.cpp
+++ b/MilliOhmMeter_FW/src/measure.cpp
@@ -0,0 +1,40 @@
+#include "measure.h"
+
+void initMeasure( void )
+{
+
+}
+void handleMeasure (void )
+{
+
+}
+
+measureMode getMeasureMode( void )
+{
+  return measureMode::mA200;
+}
+
+double getMin( void)
+{
+  return 14.4;
+}
+
+double getMax(void)
+{
+  return 234.8;
+}
+
+double getRms(void)
+{
+  return 146.7;
+}
+
+uint8_t getBar(void)
+{
+  return 68;
+}
+
+double getValue(void)
+{
+  return 144.8;
+}
--- a/MilliOhmMeter_FW/src/measure.h
+++ b/MilliOhmMeter_FW/src/measure.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Arduino.h"
+
+enum measureMode
+{
+  mA20,
+  mA200,
+  mA1000,
+  mAuto
+};
+
+void initMeasure( void );
+void handleMeasure (void );
+
+measureMode getMeasureMode( void );
+
+measureMode getMeasureMode( void );
+
+double getMin( void);
+double getMax(void);
+double getRms(void);
+uint8_t getBar(void);
+double getValue(void);
--- a/MilliOhmMeter_FW/test/README
+++ b/MilliOhmMeter_FW/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html
--- a/MilliOhmMeter_FW/workspace.code-workspace
+++ b/MilliOhmMeter_FW/workspace.code-workspace
@@ -0,0 +1,9 @@
+{
+	"folders": [
+		{
+			"name": "MilliOhmMeter_FW",
+			"path": "."
+		}
+	],
+	"settings": {}
+}