Error's updating Modem Firmware Thingy:91

[Rudolph Aschmoneit]

Hello together,

I am try to get the asset_trecker_v2 to work on my thingy 91. When reading the debug log in LTE Link Monitor I see the warning:

[1;33m<wrn> modem_module: Unsupported modem firmware version: mfw_nrf9160_1.2.2[0m[00:02:00.435,363]
[1;33m<wrn> modem_module: Expected firmware version: mfw_nrf9160_1.2.3[0m

So I downloaded the latest firmware package for the thingy and tried to updated the modem Firmware with the nrF Programmer and thingy in serial recovery mode (MCUBoot Enabled)
But I got the Error:

Modem DFU failed with error: Error: Error occured when program. Errorcode: CouldNotCallFunction (0x9) Lowlevel error: Unknown value (ffffff24)

When I first started with Thingy I had some problems to get everything working (as you can see here)
The solution back then was to update the nRF52840 on the thingy via the nRF9160 DK Debug Probe and the connectivity bridge.

So I flashed the "thingy91_nrf52_connectivity_bridge_2021-03-04_8e8c6089.hex" file from the img_app_bl folder via the debug Probe (SW2 at the thingy in nRF52 position)

Then I tried again to update the modem firmware with the nrF Programmer but same Error as mentioned above persisted.

Do you have any Ideas how I could fix this?

Thank you very much in Advance!
Best Regards 

Rudolph

[Heidi]

Hi!

If you have an external debug probe available, could you try updating the modem FW like that, instead of in serial recovery mode?

Best regards,

Heidi

[Rudolph Aschmoneit]

Hey Heidi,

thanks for your fast reply. And sorry for being stupid enough not to have this idea on my own. The programming process went through without errors. But I could not really check the Firmware Version until cloud is not under maintenance anymore or is there a way to get the modem FW version in the LTE Link Monitor console?

Best Regards
Rudolph

[Rudolph Aschmoneit]

Hey Heidi,

Today I could check modem firmware version in nrFCloud. It is mfw_nrf9160_1.2.3, so everything worked fine. Thanks for your help!

Best Regards

Rudolph