We have a customized PCB for BG95-M3 module with esim (ST4 SIM-200m). We were connected the module with the UART port, The module is responding correctly with AT commands.
We were facing problem with esim activation, When we give AT+QCCID we got +CME ERROR: 13
AT+CPIN we got +CME ERROR: 10.
What will be the issue for that?
I saw your another post about BG95M3 not turning on. It seems that you have figured it out. Could you share how you solved this problem?
For this question, CME ERROR: 10 and CME ERROR: 13 represent (U)SIM not inserted and (U)SIM failure, respectively. If you use the schematic from the previous post, I suppose it’s because SIM_DATA is directly connected to VDD_SIM. That is, when the uSIM is inserted, SIM_DATA might always be high. Replacing the 20K ohm resistor with a 0 ohm might help.
Could you measure the timing diagram of VDD_SIM, SIM_RST, SIM CLK and SIM_DATA while the card is inserting?
Could you also double check if the SIM card detection is disabled by sending ” AT+QSIMDET?” ? The function is disabled by default. In your design, the SIM_DET PIN is unconnected. If the first integer of the response is 1 (enable), the module will not recognize the inserted SIM card.