TRM250 disable network interface

[Leos]

Hi,
we have TRM250 for sending SMS, this is working fine.

Firmware Revision:
AT+GMR
BG96MAR02A10M1G
OK

But the device is adding new network interface to LTE network too, so our computer is then part of mobile internet. We are looking for some tip how / if this can be disabled.
So we need AT communication for sending SMS only.

Sure, we can use SIM card with data service disabled (no data), but most of SIM cards has data enabled by default.
Thank you very much.
Leos

[anon65719490]

Hello,

Thank you for reaching out.

I’ve reviewed the BG96 modem’s AT command set, and unfortunately, there’s no AT command available on the module itself to disable the data network interface entirely. This behavior is handled by the host system. Once the modem enumerates its interfaces, the modem will present its available functions (including the data interface), and it’s up to the connected system to decide whether to use them.

That said, here are a few practical options you might consider:

• Manually disable the network interface on your PC or system each time it appears.

or

• Using a SIM card with mobile data disabled, as you already mentioned, is often the simplest and most reliable hardware-based safeguard, especially in setups dedicated to SMS communication.

Unfortunately, the modem itself doesn’t support disabling the data interface entirely through AT commands while still maintaining AT command functionality for SMS.

I hope this clarifies it. Feel free to reach out if you have any further questions.

Best regards,