[BG95-M3] CME ERROR:13 on esim activation

IoT Modules LPWA Module
1

Hi,
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.
VDD_SIM is 0v.
What will be the issue for that?

Thanks
Shahas

esim
esim935×427 17.8 KB

2

Hi
You can try raising VDD_SIM voltage to 1.8V and try again

3

Hi,
Is it possible to give VDD_SIM voltage externally.

Thanks
Shahas

4

Hi
It is observed that the connection of the logic diagram is normal, please use the oscilloscope to detect whether there is 1.8V voltage AT AT+CFUN=0,AT+CFUN=1, if there is, it indicates that the module works normally. In addition, BG95M3 only supports 1.8V voltage eSIM, please check whether the eSIM card is compatible with the module.

5

Hi,
We have checked as you given, At VDD_SIM 1.8v is getting only when power is turned on only for 2s. Both AT+CFUN=0, AT+CFUN=1 getting 0v at VDD_SIM. Is there any problem with the module.

Thanks
Shahas

6

Hi,
Is it required to register the esim to network for detection.

7

Hi,
I’m sorry for the delay in my reply. If the voltage changes when the power is turned on, there will certainly be voltage changes when the AT+CFUN=0 and AT+CFUN=1 are executed sequentially. It is recommended to check whether ESIM is normal and whether it is compatible with BG95M3.

8

I’d check if those 33pF are interfering. Check the clk and i/o waveforms on a scope. They generally only appear at boot. Also check the “SIM_GND” is connected to 0V, no real need to differentiate.