MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

RE: MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

Alpo Leinonen — Tue, 24 May 2022 12:40:20 GMT

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

RE: MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

Albrecht Markus Schellenberger — Fri, 20 May 2022 12:14:50 GMT

Hello Alpo & Niclas,

[quote user="AlpoLe"]

Where does the application get information that the SIM card is missing?

[/quote]

The modem will report an UICC failure during connect, see lte_evt_handler() in Asset Tracker v2. Additional information can be requested using %XSIM.

Regards,

Markus

RE: MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

nWre — Fri, 20 May 2022 09:31:32 GMT

Hi, I wish to tag a long for this. Sometimes my sensors won't have signal and will require separate code to be run. Is there anyway to check if the sim card is inserted or not? This would provide a nice way of telling what mode should be run. If not, is there a way to check for connectivity and then decide?

Regards

RE: MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

Alpo Leinonen — Fri, 20 May 2022 09:06:26 GMT

Hello Markus,

I want to make the application so that the lack of a SIM card does not cause a reset request. But the application remains in a fault state to flash the red LED.

Where does the application get information that the SIM card is missing?

Regards,

-Alpo

RE: MODEM_EVT_ERROR causes a boot loop when the SIM card is missing

Albrecht Markus Schellenberger — Fri, 20 May 2022 07:33:14 GMT

Hello Alpo,

[quote user=""]The question is how do I know that now the SIM card is missing?[/quote]

I’m not sure if I understand your question and use case.

Since you removed the SIM card and as a result, Asset Tracker v2 sends a reset request, you should be aware of that your device doesn’t operate with a SIM card at that time?

Regards,

Markus