Modem DFU via MCUboot freezes at Step 1/2 (updating firmware).

[Mr Gu]

Hi all,

I am trying to get started with the Nordic thingy 91 but I am not able to update the latest firmware.

The programmer is only showing one Serial port. The instructions says there should be two? (first photo)

The programmer freezes at the end of Step 1/2. (second photo)

I am using MacOS Catalina v.(10.15.7).

Any ideas :)?

[Heidi]

Hi!

Try updating the FW on the nRF52840 first. It's called "Connectivity Bridge" and should be in the folder with FW images you downloaded from our website. Make sure to press SW4 instead of SW3 when putting the device in serial recovery mode.

Best regards,

Heidi

[Kiyasul]

Heidi said:

mode

1. Update app FW on nRF5240 (Pressed SW4 before power on and flashed connectivity bridge .hex successfully)

2. Update app&modem FW(.zip) on nRF9160 (Pressed SW3 before power on and no LEDs work and doesn't seem to go to serial recovery mode as well but if I press SW4 and power on; I can now flash modem firmware but again gets stuck at step1 )