shutdown timer improved

BoardInterface.cpp

@@ -33,8 +33,12 @@ void BoardInterface::shutdownDevice() {
 
   Serial.println("Shutdown.");
 
-  displayMessage("Shutdown in 3 sec.", "");
-  delay(3000);
+  char msg[20];
+  for (int i = 3; i >= 1; i--) {
+    sprintf(msg, "Shutdown in %d sec.", i);
+    displayMessage(msg, "");
+    delay(1000);
+  }
 
 #ifdef SIM800L_ENABLED
   if(sim800l->isConnectedGPRS()) {

RELEASENOTES.md

@@ -4,7 +4,7 @@
 - tech refactoring: `hexToDecFromResponse`, `decFromResponse`
 - added support for GPS module on HW UART (user HWUART=2 for m5stack NEO-M8N)
 - sd card logging - added gps sat/lat/lot/alt + SD filename + time is synchronized from GPS
-- menu cycling
+- small improvements: menu cycling, shutdown timer
 
 ### v2.1.0 2020-12-06
 - m5stack mute speaker