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Nordic Thingy:91 - Can't connect to nRF Cloud

Hello,

I recently got my hands on a Nordic Thingy:91. Following every steps of the User Guide with no harm until the nRF Connect for Cloud connection (step 7.4.). The LED on the device is blinking yellow and when I enter the device info for registration on nRF Cloud I get error code 40412.

I went through the possible reasons :

  1. I double checked IMEI and PIN codes on my device .
  2. I attempted association once the LED was yellow (is this the correct color with fw versions I flashed ? See below version)
  3. Is the modem version I used corrupted ?
  4. I updated the device certificate for the Cloud registration
  5. The area I'm in has LTE-M coverage as I'm working on another project with LTE-M connectivity.

 

Some inputs that may help troubleshooting the issue :

  • I am in Paris, France - country covered by iBasis for LTE-M
  • I flashed the following files by USB with nRF Connect Programmer :
    • Nrf52 application on nRF52940 : thingy91_nrf52_connectivity_bridge_2021-06-28_7a076c22.hex
    • Modem firmware on nRF9160 : mfw_nrf9160_1.3.0.zip
    • Modem application on nRF9160: thingy91_asset_tracker_v2_ltem_2021-06-28_7a076c22.hex
  • After flashing the modem application the LED passed from off to blinking yellow for several minutes, then blinking purple for about a minute then blinking blue for about a minute. At some point it loops between blinking purple and blinking blue.
  • I tried with 2 devices : same result
  • I updated the device certificate
  • I have not connected external antennas (LTE-M or GNSS)

 

Also with LTE Link Monitor I captured some logs :

 

 

 

I will try another SIM card as I read on similar posts that iBasis SIM might not work well everywhere.

In the meanwhile, any help will be highly appreciated.

Luca

Parents Reply Children
  • Hello all,

    As I'm waiting for new iBasis SIM cards, I tried with a BICS sim card and the network connection worked right away. From there no problem registering my device to nRF Cloud. I now can see humidity, temperature, received signal power plots on nRF Cloud.

    Next step for me is finding out how to add plots for data such as battery voltage and accelerometers.

    I will let you know how the new iBasis sim works out once received.

    Luca

  • Luca Z said:
    As I'm waiting for new iBasis SIM cards, I tried with a BICS sim card and the network connection worked right away. From there no problem registering my device to nRF Cloud. I now can see humidity, temperature, received signal power plots on nRF Cloud.

    Thanks a lot for your feedback, Luca! I’m glad to hear that it works with another SIM card.

    Regards,

    Markus