use sparkfun lib for sensors adafruit has issues

buttons.cpp

@@ -6,16 +6,45 @@ uint8_t g_previous_mode_button_state = 1;
 uint32_t g_last_debounce_time = 0;
 uint32_t g_debounce_delay = 50;
 
+Button buttonCenter(BUTTON_CENTER);
+Button buttonLeft(BUTTON_LEFT);
+Button buttonRight(BUTTON_RIGHT);
+
 void initButtons(void)
 {
   Serial.print("initButtons:");
+  buttonCenter.begin();
+  buttonLeft.begin();
+  buttonRight.begin();
+
   pinMode(MODE_BUTTON_PIN, INPUT_PULLUP); // Pin for switching screens button
   Serial.println(" OK");
 }
 
 void handleButtons(void)
 {
-  g_previous_mode_button_state = g_current_mode_button_state;
+  //handle buttons
+  buttonCenter.read();
+  buttonLeft.read();
+  buttonRight.read();
+
+  if (buttonCenter.wasPressed())
+  {
+    backlightRefresh();
+  }
+
+  if (buttonLeft.wasPressed())
+  {
+    previousSensor();
+    backlightRefresh();
+  }
+
+  if (buttonRight.wasPressed())
+  {
+    nextSensor();
+    backlightRefresh();
+  }
+
   g_current_mode_button_state = digitalRead(MODE_BUTTON_PIN);
 
   // Check if button is now pressed and it was previously unpressed