Problems using AT+CSIM command | Telit Cinterion IoT Developer Community
September 10, 2019 - 2:07pm, 3327 views
I have a GSM modem. The SIM card has a custom applet installed that I am trying to communicate with using custom APDU messages but I am having difficulties so am hoping that someone will be able to offer some advice please.
When I send the at command At + csim = 42,"00a4040010AID" to select my custom applet just reply: +CME ERROR: unknown
My GSM modem responds to many At command even for example when I send AT+CSIM=14,"00a40000023f00". But when in command P1='04' i.e select with AID reply +CME ERROR: unknown.
I try to open a new channel first like in the example below:
But reply +CME ERROR: unknown
I hope anyone can help me.