Thingy91 gives error

[Hetsh]

I was working on a modified version of Asset Tracker on thingy91.

Everything was working fine during the development and I almost finished the task needed and then I thought instead of downloading the code using debug-> go, I thought to just use Trarget->Download-> zephyr/merged.hex.

Suddenly I began to get this error 'Shutdown modem' that I never got before and it keeps restarting with no LEDs giving any light.

[00:00:00.295,501] [0m<inf> ui_nmos: Example r[00:00:00.432,495] [0m<inf> asset_tracker: Connecting to LTE network.[0m
[00:00:00.444,519] [0m<inf> asset_tracker: This may take several minutes.[0m
[00:00:01.721,801] [1;31m<err> asset_tracker: Shutdown modem

I tried update the modem again to 1.2.1 using nrf connect and it completed fine, then tried to go back to original code of Thingy by either thingy91_nbiot_dfu_2020-04-29_bc7ade8b.hex, thingy91_ltem_dfu_2020-04-29_bc7ade8b.hex, and thingy91_at_client_dfu_2020-04-29_bc7ade8b.hex but non returned things to normal.

Please advise.

Best Regards

HeTsH

[Martin Lesund]

Hi Hesham,

There has been some issues that the flash has not been fully erased lately, so please try to do an "erase all" before flashing the new firmware.
Also I suggest that you enable some extra debug flags so your application can print why it shuts down:

CONFIG_LOG=y
CONFIG_AT_CMD_LOG_LEVEL_DBG=y
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y

From the description, it almost sounds like the SIM card does not have any data left.


Best regards,
Martin L. 

[Hetsh]

You were right that erase all and then reprogram works. On the other hand Shutdown modem was due to sending out messages before connecting to the cloud.