RAI feature with LTE-M and MQTT

[Frikkie Badenhorst]

Hi there,

We are currently conducting tests on the nRF9160 using the LTE Serial Modem app. We do however have issues testing the RAI feature on the device with an LTE-M network. The network does indeed support the RAI feature, as we have been able to test this using different devices.

According to the AT commands reference manual, the %XRAI command is not supported in a LTE-M network? Is that indeed the case?

We then refer to the %RAI (8.17 in AT commands reference manual) and %REL14FEAT (8.18). However, we are not able to use any of these 2 features? We continuously get the "ERROR" response when trying to active the REL 14 features. We have set CFUN to 0,1 and 4 to attempt this. 

Can you please assist with instructions on how to enable this feature on a LTE-M network so that we can test it? 

This is very urgent as we need to decide on which hardware we will use in our product today/Monday.

[Albrecht Markus Schellenberger]

Hello Frikkie,

Frikkie Badenhorst said:

Do you perhaps have an application note/instructions on how to use and test this feature - more specifically how to give the release assistance information via a socket interface to the modem?

You can have a look at the nRF9160: Modem Shell application as it demonstrates how to use the %RAI command. This is as well described in the application guide.

Frikkie Badenhorst said:

Will this requires writing application code?

 Yes. You have to customise your application since we do not have a single sample for every AT command supported by the modem.

Frikkie Badenhorst said:

Thus if it is needed to change application code, can you kindly provide the hex file so that we can test it?

 Unfortunately, I can’t provide you with any .hex file more than the application firmware images that are officially released for the nRF9160 DK.

Regards,

Markus