Communication problem after turning off BG96


I have one problem in following scenario:

  1. I can send AT commands to BG96 with success and with OK responds.
  2. I m turning off modem by PWRKEY PIN (HARDWARE)
  3. I m turning on modem by PWRKEY PIN (HARDWARE)
  4. after 1,2 and 3 step I m not able to communicate with modem (no matter what I send to the modem there is no response )

What I m doing wrong?

In you MCU board , Have you share GND with BG96?

If you have made a shared GND, it is a module crash. You need to grab dump log for specific analysis

I checked another two and BG96. Everything is ok. Module was crashed.