RPLMN when using %NCELLMEAS

[Mack.wilz]

If I am not currently connected to a network and use AT%NCELLMEAS=0, how is the RPLMN determined? Are previous connected PLMNs stored in RAM in the device for comparison or will all PLMN cells be returned because I am not currently connected?

Thanks,

Mack

[Håkon Alseth]

Hi,

 

RPLMN is previously registered PLMNs. These are stored in the modem history.

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/ncellmeas_set.html?cp=2_1_4_36_0

If there's no neighbors, it behaves as described in the above mentioned document:

If a suitable cell is not found, the modem performs a light search where it continues the search by measuring the radio conditions and makes assumptions on where networks might be deployed. 
If RPLMN is not found based on previous cell history, the modem accepts any found PLMN.

 

Kind regards,

Håkon