Sodaq Sara R410M - Not responding to AT after few seconds of Powerup

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.

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@Naresh_kumar @kirkandblackbeard

I am going to investigate this issue.

Kind regards,
Jan

@Naresh_kumar

Can you please share the board and module version with me.
Can you also share the AT sequence you do?

Kind regards,
Jan

@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.

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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.

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Hi everyone,

It seems that a software upgrade will fix the issue.
How to see: http://support.sodaq.com/sodaq-one/sodaq-sara-r410m/#firmware_r4xx_update
For the latest firmware send an email to ublox.

Kind regards,
Jan

I can confirm the new firmware update indeed solves this issue. Thanks Jan!

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Hi,
What is the fw version that solved this issue?
Thanks

@monalisan

On this page I have written down the stable firmware versions.
https://support.sodaq.com/sodaq-one/firmware-upgrade/

It is recommended you have a version on this page or newer!

Best regards,
Jan

Thanks Jan!
I have the L0.0.00.00.05.06,A.02.00 version on my SARA R4 board. My problem is that without the SIM card inserted, AT commands can be sent “for ever”. But if I start it with the SIM card inserted it is only responding for a few seconds after restart. Should I upgrade?
Best Regards

Hi @monalisan ! I’m having the same issue. Any news on that?

Hello, I’ve got the same problem with my R410M, but only with T-Mobile sim cards. Vodafone and KPN work fine. Anyone who found a solution?

Hi,
For me the problem was solved , by handling the PWR pin correct at boot Se the issue:

Best Regards

Hi, I tried the solution but didn’t work. I changed to a different board and with the same SIM card I now can communicate even when the SIM card is inserted. Nevertheless I will try to make the previous board work. I will post any finings.

Cheers!