Serial LTE Modem - Release Assistance

[Michal Mühlpachr]

How can we use RAI in SLM please ?

I was not able to find corresponding commands alike in Modem Shell:

sock rai --rai_enable
sock rai -i 0 --rai_last

[Albrecht Markus Schellenberger]

Hello again Michal,

this is not supported by the Serial LTE modem application yet, but the functionality was recently added to the master branch.

The test sequence will look like below:

AT%RAI=1
AT+CSCON=1
<attach>
at#xsocket=1,2,0
at#xsocketopt=1,52
at#xsendto=<url>,<port>[,<data>]

52 is one uplink packet and one downlink packet, then release RRC connection. The server listed above is an ECHO server, we open a UDP packet, send something to it, get the echoed packet. The +CSCON will report when RRC is released.

Our developers have verified this working in a few NB-IoT networks.

You can also check the pull request, which comes with a nice documentation for the socket service.

I hope this answers your question!

Regards,

Markus