RE: Use nrf9160 as cellular modem with vanilla Zephyr

vytautas — Fri, 14 Feb 2025 11:15:44 GMT

This is good information.

Thanks for sharing.

RE: Use nrf9160 as cellular modem with vanilla Zephyr

Charlie — Fri, 10 Jan 2025 11:29:10 GMT

Hi Sebastian,

Thank you for sharing your experience. The NCS documentation page nRF91 Series as a Zephyr-compatible modem provides some details you can refer to for further guidance.

Best regards,

Charlie

RE: Use nrf9160 as cellular modem with vanilla Zephyr

epneosb — Fri, 10 Jan 2025 09:54:39 GMT

I probably already know the answer to my question. :-D But in case anyone else has a similar question, I'm going to write down my analysis here anyway. A confirmation would be nice, of course. Many thanks to Bjarki Arge Andreasen, who helped me a lot.

As far as I understand, the old 'gsm_ppp' driver has been replaced by the 'modem_cellular' driver. This implements the current standard of 3gpp AT commands, PPP and CMUX. The 'nrf91-slm' driver is actually the 'modem_cellular' driver, and the Nordic Serial LTE firmware also implements exactly this interface, which is probably why the driver is also called 'nrf91-slm'. :-)

The modem subsystem is in turn used by the modem_cellular driver or modem drivers in general.

So if you end up using an nrf9160 as a standalone modem, you can use the Nordic Serial LTE modem firmware and then control it with the 'nrf91-slm' driver with a Zephyr running on the host controller.

Greetings
Sebastian