How can I perform a DFU from an ESP32 to a nRF52840?

[hsanderr]

I have a nRF52840 and an ESP32 and I want to perform a DFU to nRF52840 from ESP32, supposing I have the signed binary file in the ESP32. I was already able to perform the DFU to nRF52840 using MCUboot, making nRF52840 enter recovery mode and using a mcumgr client on my laptop to run mcumgr -t 20 --conntype serial --connstring=COM6 image upload app_update.bin, but I don't know how can I perform the DFU from the ESP32, can anyone help me with this? I am using Zephyr v3.1.99-ncs1 in nRF52840 and ESP-SDK in ESP32.

[rftafas]

Hi!

There was a similar question here. So, you would need mcumgr server on nRF (seems available) but also port the client to ESP-IDF/FreeRTOS (not available).

If you are using ESP32 as a connectivity device, this link may help.

Probably there is code to be written on your end. I can say about how hard it will be.

[hsanderr]

Hi!

Thank you for your answer, from the researches I've been doing, I guess that this would be the solution indeed.