MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

Question

I am testing the Asset_tracker_v2 application on thingy-91. I took the SIM card out so the device goes into the boot loop. 
 The on_state_init () function has the condition MODEM_EVT_ERROR which happens here. As a result, a reboot is performed. 
 
 The question is how do I know that now the SIM card is missing?

Can I check based on sim-id (iccid)? That is zero in this situation. 
 
 Best Regards 
 -Alpo

user115110 · Accepted Answer

Thanks Markus, 
 With this information, I will be able to continue the development work.

case LTE_LC_EVT_NW_REG_STATUS:
 if (evt->nw_reg_status == LTE_LC_NW_REG_UICC_FAIL) {
 LOG_ERR("No SIM card detected!");
 SEND_ERROR(modem, MODEM_EVT_ERROR, -ENOTSUP);
 break;
 }

Regards, 
 -Alpo

MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

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