Issue: flashing nRF52840 (nrf52840_pca20035) in Thingy91 device (PCA20035)

RE: Issue: flashing nRF52840 (nrf52840_pca20035) in Thingy91 device (PCA20035)

Didrik Rokhaug — Tue, 05 Nov 2019 13:09:36 GMT

The zip file contains both hex files and bin files for MCUBoot dfu.

Tejaswini — Tue, 05 Nov 2019 12:44:00 GMT

Hi,

Any references for Pre-build Images for nRF52840 (PCA20035)..?

Thank you.

Tejaswini — Tue, 05 Nov 2019 12:40:32 GMT

Hi Didrik,

Thanks for the quick turn around.

Unfortunately, Windows 10...!! ;(

Didrik Rokhaug — Tue, 05 Nov 2019 12:35:32 GMT

Hi.

Yes, it is possible to flash the nRF52840 on the Thingy:91 using MCUBoot, similar to the nRF9160.

To get the nRF52840 into bootloader mode, hold SW4 (the small white button on the side of the nRF9160 while powering on the Thingy:91.

However, on Windows (10) there is a driver issue causing the nRF52840 in bootloader mode not to be recognized, and firmware update with mcumgr fails.

This problem is fixed on the 1.1-branch, but I am looking into solutions that do not require updating the firmware to enable programming via MCUBoot.

If you are on a different OS, it the default firmware might work for you. What OS are you on?

Best regards,

Didrik