Send text SMS with nRF9160 and LTE Link Monitor

RE: Send text SMS with nRF9160 and LTE Link Monitor

Fabrice D — Mon, 21 Aug 2023 15:31:07 GMT

It's me again.

I've just succeded in sending an SMS. I have removed the "+" character at beginning of the phone number.

AT#XSMS=2,"33673995916","SLM test"

Regards

Fabrice

RE: Send text SMS with nRF9160 and LTE Link Monitor

Fabrice D — Mon, 21 Aug 2023 15:20:51 GMT

Hi Didrik,

I have installed the Serial Terminal application and tried to send an SMS with the AT#XSMS command. Unfortunately, there is an ERROR. Maybe something has to be configured before to send an SMS?

> AT+CFUN=1

OK
> AT#XSMS=?

#XSMS: (0,1,2),<number>,<message>

OK
> AT#XSMS=2,"+33673995916","SLM test"

ERROR

Regards

Fabrice

RE: Send text SMS with nRF9160 and LTE Link Monitor

Didrik Rokhaug — Thu, 17 Aug 2023 15:03:15 GMT

The nRF9160 has an integrated application processor, and the modem is only accessible through the application processor.

Hence why we have a sample application like the at_client, which simply forwards AT commands sent over UART to the modem core.

Similarly, the SLM runs on the application core, and implements extra AT commands (such as the #XSMS command) so that features that there might not be AT commands for (e.g. IP sockets or GNSS) are exposed as AT commands, or just making some things easier (such as sending and receiving SMS).

You can find a pre-compiled version for the DK on our website, or you can install the nRF Connect SDK and build the application yourself.

RE: Send text SMS with nRF9160 and LTE Link Monitor

Fabrice D — Thu, 17 Aug 2023 07:22:47 GMT

Hi Didrik,

Thank you for your answer.

i would like to simply to test sending and receiving SMSes. What is SLM application and how can I get it? I do not see it in the list of applications in the nRF Connect for Desktop.

Regards,

Fabrice

RE: Send text SMS with nRF9160 and LTE Link Monitor

Didrik Rokhaug — Wed, 16 Aug 2023 15:40:59 GMT

Hi,

What are you trying to do?

You can find the SMS related AT commands here: https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/text_mode/text_mode.html

However, they aren't the easiest to use, as you would have to encode the data yourself.

If the point is simply to test sending and receiving SMSes, it is much easier to use the #XSMS command in the Serial LTE Modem (SLM) application.

Or, if you want to use SMS in your application, you should use the SMS library, which is demonstrated in the SMS sample.

Best regards,

Didrik