I am making a GSM Tracker with SIM800C module. After deploying it into vehicles, it works fine... But after some days, it starts responding as CME ERROR: 15 SIM wrong for command AT+CPIN? & CME ERROR: 10 SIM not inserted for commands required to build TCP Connections. The Commands are written below.
delay(100); myGsm.println("AT+CIPSHUT"); delay(1000); printSerialData(); myGsm.println("AT+CIPMUX=0"); delay(2000); printSerialData();
Also I checked the potential between SIM800C's SIMVCC & GND it was 1.8 V which is fine. I am not able to understand the cause of the errors. My Schematic is:
Someone, please suggest the solution as it gets disconnected with the server in between the journey & tracker losts.