MKR 1400

Hardware MKR Family MKRGSM1400
2

Hi @mariusdima,

I just tried the TestModem example with both a SIM and without a SIM, all looks good.

Could you please add the following to the sketch in setup():

  // initialize serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  MODEM.debug(); /// <---- Line to add

Then provide us with the output. Also, do you have a battery connected to the board?

Which sketches were you using previously, do they still work?