In the stk menu I got something like this:
+STIN: 1
AT+STGI=1
+STGI: 1," Press ok to complete transaction",1
This is the end of a transaction, I just need to press the ok button to complete it.
What at-command am I supposed to use here?
There's should be only 3 command in STK, which is +STIN, +STGI, +STGR, it should be same with if STK require response such as 1,2,3,etc, so you may try with AT+STGR=1,1