I am working on AWS freeRTOS where I have ported it for Ublox Sara R4 cellular module,
This ported source was working fine and communicating to AWS using MQTT,
Weirdly same source stopped working complaint about registration failure , and after some sort of debugging I found that it is replying “CELLULAR_RAT_INVALID” (detailed logs attached herewith), I am using hologram (global sim card) and has enough credit.
I tried using Cellular_SetRatPriority() manually but it has the same result.
From below logs it can be seen on invalid RAT, more logs attached in zip
[ERROR][CELLULAR][lu] SrvStatus: rat 255 cs 3, ps 3, mode 0, csRejType 0, csRej 0, psRejType 0, psR>>> Cellular GetServiceStatus failed 0, ps registration status 3 <<
I suspect PDN context but not sure on this.
Any guidance would be appreciable.