nRF9151 supported AT commands

RE: nRF9151 supported AT commands

Jamal_nRF — Mon, 27 Oct 2025 18:53:29 GMT

Appreciate the confirmation, thank you

RE: nRF9151 supported AT commands

Mariano Goluboff — Fri, 24 Oct 2025 19:34:19 GMT

The TX test requires the PTI firmware running on the modem core. With the Cellular modem firmware, only the RX test is available.

Mariano

RE: nRF9151 supported AT commands

Jamal_nRF — Thu, 23 Oct 2025 18:04:12 GMT

More information:

The %XRFTEST command is also documented in this PTI document:

https://docs.nordicsemi.com/bundle/ref_at_commands_pti/page/REF/at_commands/intro_pti.html

Section 4.24 TX test %XRFTEST on page 38

where there is more details about the TX test using the same command.

Question:

Does the TX test require the PTI firmware to be programmed on the modem core?

Please confirm...

Jamal

Looking back at my earlier note from last month, I was able to execute the XRFTEST command for the receiver --setting <test> parameter to 0.

But for transmitter, the <test> parameter needs to be set to 1.

Which does not seem to work using modem firmware version mfw_nrf91x1_2.0.2

AT%XRFTEST=1,1,12,7040,20,1

ERROR
AT%XRFTEST=1,0

ERROR

RE: nRF9151 supported AT commands

Jamal_nRF — Thu, 23 Oct 2025 14:52:50 GMT

Hi Benjamin,

Follow up question regarding the %XRFTEST command

--as documented in section 11. Production test commands

of the "nRF91x1 Cellular AT Commands" manual, page 201.

As stated, the proprietary %XRFTEST command can be used to test the nRF91x1 receiver.

Is there a command specific for testing the RF transmitter for the nRF9151?

What alternative is available to test the RF transmitter in FTM (Factory Test Mode)?

Best regards,

RE: nRF9151 supported AT commands

Jamal_nRF — Thu, 28 Aug 2025 15:36:19 GMT

Hi Benjamin,

Thank you for confirming the nRF951 is shipped with the PTI image by default

Re: what are you trying to achieve?

For factory support, there is a request for a specific AT command to control TX mode --which seems to be fulfilled by at%XRFTEST

Yes, I have been able to confirm it is available in regular MFW 2.0.2

Also been able to test it with the ModemShell application available from the Desktop / Quick Start

Realized I had to turn off modem first through cfun=0

> at+cfun=0
at+cfun=0
+CGEV: ME DETACH
OK
> at%xrftest=0,0
at%xrftest=0,0
OK
> AT%XRFTEST=0,1,1,21400,-65,0
AT%XRFTEST=0,1,1,21400,-65,0
%XRFTEST: -26428,-54
OK
> at+cgmr
at+cgmr
mfw_nrf91x1_2.0.2
OK

>>> So I don't think any further integration work is needed to support this test command

Thank you

RE: nRF9151 supported AT commands

Benjamin — Thu, 28 Aug 2025 10:13:09 GMT

Yes, the nRF9151 comes with the PTI.

RE: nRF9151 supported AT commands

Benjamin — Thu, 28 Aug 2025 09:02:34 GMT

Hi Jamal,
Could you tell me more about what you are trying to achieve here? AT%XRFTEST is available in regular MFW.

You can use the AT client to issue AT commands to the modem.
No, the modem FW is closed source.
I am not quite sure what you mean here. Do you mean to issue the command from the application?
I will come back to you on this, I think it is shipped with the PTI but I will double check.

RE: nRF9151 supported AT commands

Jamal_nRF — Wed, 27 Aug 2025 15:53:58 GMT

Hi Benjamin,

I used the Desktop to write/program the PTI mfw-pti_nrf91x1_2.3.6.

Works fine.

I realized it's a modem firmware

Trying to figure out where to send AT commands from? (AT%XRFTEST in particular)

Able to open a com port from the Desktop terminal. Only shell commands are available, but no AT support.

1. which application to use for the MCU that works with this modem 2.3.6 image?

2. is the source code for AT%XRFTEST available somewhere?

3. would it make sense to try to integrate this command on the MCU application? for example within the Serial LTE Modem application?

Reason is to avoid programming the modem firmware back and forth between 2.0.2 and 2.3.6 during our device production

4. additional question: which version is programmed on the nRF9151 SiP when they ship from Nordic? Assuming it would be the latest 2.0.2, but please confirm

Thank you

RE: nRF9151 supported AT commands

Benjamin — Wed, 27 Aug 2025 08:11:50 GMT

Hi Jamal,
In nRF Connect for Desktop, open the Programmer and upload the entire zip file. The tool will handle the rest.

Add File → Write

RE: nRF9151 supported AT commands

Jamal_nRF — Tue, 26 Aug 2025 21:18:55 GMT

Hi Benjamin,

Thanks for the confirmation.

Currently using the SDK version V3.0.2

Follow up question:

Looking for Production Test command 11.1 RX test %XRFTEST described in the manual section 11

Apparently it is available in the PTI image as documented here

https://www.nordicsemi.com/Products/nRF9151/Download?lang=en#infotabs

Able to download the corresponding zip file mfw-pti_nrf91x1_2.3.6

Question: which image (.ex file) to use to program and test the PRI application on the nRF9151DK?

Thank you

RE: nRF9151 supported AT commands

Benjamin — Tue, 26 Aug 2025 07:16:12 GMT

Great!
Yes, the baud rate is now set in the device tree. Previously there was an AT command (#XSLMUART) for it, but it has been removed as of NCS v2.5.0.

RE: nRF9151 supported AT commands

Jamal_nRF — Mon, 25 Aug 2025 13:38:21 GMT

Hi Benjamin,

Thank you for clarifying the communication between the modem and the application core.

Found the associated block diagram in the documentation

My application use case is rather the latter, communicating over UART to an external processor, using the SLM Application as a starting baseline.

The baud rate in this case is covered by the .overlay configuration

RE: nRF9151 supported AT commands

Benjamin — Fri, 22 Aug 2025 08:15:50 GMT

Hi Jamal,
If you’re referring to communication between the modem and the application core, the modem library handles this through the RPC library, using the IPC peripheral and a shared RAM region.

Or are you asking about using the nRF9151 as a standalone modem communicating with an external MCU?

Benjamin

RE: nRF9151 supported AT commands

Jamal_nRF — Thu, 21 Aug 2025 14:03:08 GMT

Hi Benjamin,

Thank you for the links and the confirmation on ATE0 / ATV0

How about AT+IPR? Could you please confirm not supported as well?

What would the default baud rate between the MCU and the integrated modem?

Best regards,

RE: nRF9151 supported AT commands

Benjamin — Thu, 21 Aug 2025 10:36:29 GMT

Hi Jamal,

The AT commands are documented in the following guides:

Modem-specific AT commands - nRF91x1 AT Commands Reference Guide
Proprietary AT commands - SLM-specific AT commands

This is the newest and official documentation and should include all supported AT Commands.

We don't have AT commands for ATE0 and ATV0.

Best regards,
Benjamin