TRB142 serial COM with AT commands

[anon65719490]

Hello,

Apologies for a delayed response.

@petbar01

Is there a list or document available for the supported AT commands of this device?

Regarding this inquiry, I assume you have Quectel’s EC21 modem on your TRB142, if so the supported AT commands manual for this module is available here: File:Quectel EC25EC21 AT Commands Manual V1.2.pdf - Teltonika Networks Wiki.

@petbar01

Which AT command settings can in some way be saved in NVM so it is still active after a reboot?

Network settings such as operator selection, PDP context, APN, and authentication parameters are usually saved after a reboot.

@petbar01

Can you turn this off automatically by adding this to the rc.local file by calling the command /usr/sbin/gsmctl -A ‘AT+QCSQ=0’, so it will be updated at restart?

Yes, you can add the following command to /etc/rc.local:

/usr/sbin/gsmctl -A 'AT+QCSQ=0'

This will disable unsolicited network status reports and ensure that the setting is applied every time the device reboots.

Best regards,