AT+STKTR

Official Hardware Retired GSM Shield
1

Hello,

I have old software (hardware: Arduino UNO + GSM Shield) and have:

    Serial.println("SIM is ready!");   
  
    gsm.SimpleWriteln("AT+STKTR=\"810301240082028281830100900101\"");  
    gsm.SimpleWriteln("AT+STKTR=\"810301240082028281830100900101\"");

What is AT+STKTR and how decode value?

2

Found answer.

Is for working with SIM card tool kit. This code mean read first message from tool kit.