Flashing thingy91 using j-link

[Raz_k]

i used my j-link to flash to my thingy91 nrf52 and nrf91.

now i want to flash a new program using the usb, but nrf programmer doesnt recognize a device when i use a USB.

i erased both bords using nrfjprog -e with my j-link, but still no recognition using USB.

[JONATHAN LL]

Hello, 

you need to flash the device with code that has a bootloader on it so that i can use USB to update the firmware\software. When you erased the 52 you disabled that feature that also lets the 91 communicate with the USB as the 52 handels the pass-through. 

Use your J-Link programmer to flash original files and it should work again. https://www.nordicsemi.com/Products/Development-hardware/Nordic-Thingy-91/Download?lang=en#infotabs you can get the files here. 

Regards,
Jonathan

[Raz_k]

Thanks,
what file do i need to flash and in to what boards? 
the downloaded zip has a lot of hex files

[JONATHAN LL]

You can see in the CONTETS.txt file what is what, but 

img_app_bl/thingy91_nrf52_connectivity_bridge_2024-07-04_20471118.hex                            Connectivity bridge for the nrf52

Should be correct. 


Regards,
Jonathan

[Raz_k]

Hey Jonathan thanks for the fast response.

I tried it, but still nothing...
I flash the connectivity bridge and it was successful, then i tried to connect with the usb the device was still unrecognized.

[JONATHAN LL]

If you are trying to update the nRF9160 then that also needs the firmware with the bootloader, so you will need to flash both chips on the thingy91 for it to work like it did before. 

Regards,
Jonathan