Scan nearby LTE cell's before ServingCell registration

IoT Modules LPWA Module
1

Hello everyone,

I’m currently working on a device which integrates BG95-M3 (or BG95-M2 as alternative without GSM support) and I’m trying to understand if it is possible to get - within few seconds from powering on the modem - a list of nearby cellular tower’s RSSI, without waiting for the modem to connect to a specific serving cell.

I cant use AT+CSQ command because it gives you the current RSSI from the servingcell (so registration is needed), and I already tried AT+QENG=“neighbourcell” command too, but it seems like it also is related to a prior connection with a servingcell.

Can you help me understand if my request is solvable in some other way, or if it just cant be done for technical or other reasons?

Any help is appreciated, thanks in advance for the support.

2

Hi @at_fabiom
I think you can try “AT+QCOPS” which is the only one command do not need to register.

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3

Hi @mikey

I tried with AT+QCOPS=2 and it worked: it took like ~40 seconds to give the scan response, in the end I checked registration status with AT+CEREG? and it was still unregistered.

Thank you very much