I have uploaded pass thru sketch from github (https://github.com/SodaqMoja/Sodaq_nbIOT/tree/master/examples/nbIOT_serial_passthrough). and tried to do AT commands for T-Mobile from (http://support.sodaq.com/sodaq-one/sodaq-sara-r410m/). All were successful and commands were "OK".
After i tried to upload pass thru sketch from this (//support.sodaq.com/sodaq-one/sodaq-sara-r410m/), then it stopped & not responded for even simple AT commands.
So again i uploaded pass thru sketch from github, which gave successful results (//github.com/SodaqMoja/Sodaq_nbIOT/tree/master/examples/nbIOT_serial_passthrough). Now only first 2 secs of powerup if i given AT commands. Its responds. then it stopped responding.
I am going to investigate this issue.
Can you please share the board and module version with me.Can you also share the AT sequence you do?
@Jan I use SARA AFF R410M, version 02b-00.
Firmware version returns AT+CGMR => L0.0.00.00.05.06 [Feb 03 2018 13:00:41]
I have uploaded video of my uploading sketch and my AT commands sequence in following video in vimeo.
This happens with my board too: SARA Rev2 with SARA-R410M (02B-00). After firmware flash or after reset it works for a few seconds (up to 15 seconds at most). I just send 'AT' every second, and it stops responding with OK after some time.
Let me know if there's anything I need to test.
It seems that a software upgrade will fix the issue.How to see: http://support.sodaq.com/sodaq-one/sodaq-sara-r410m/#firmware_r4xx_updateFor the latest firmware send an email to sodaq or ublox.