Mkrwan 1300 on wall adapter


My device is normally runs on when it powered from PC, but when it powered from 5v micro USB phone charger its seems working but can't send data to gateway. What can be the problem I want to power it from wall charger ?

Please post your full sketch.

If possible, you should always post code directly in the forum thread as text using code tags:

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The simplest solution is: if in your sketch you are waiting for the serial port, when not connected to the computer, it will wait forever. You may use something like this to solve:

  while (!Serial && millis() < 10000);

Thanks MITEL, as you said the device was waiting for Serial connection. I updatetd my code as,

void setup() {
 // If debugSerial is available(device connected to PC) set debug
 while (!debugSerial && millis() < 10000) ;
 if (millis() < 10000) {
   DEBUG = 1;

void loop() {
 printlnToScreen("Retrying to connect");

void printlnToScreen (String message) {
 if (DEBUG) {