thingy53: Firmware update using MCUboot bootloader

Dear community, 

I am a beginner with nRF products. However I managed to use the nRF52840 dongle to sniff btmesh opcodes and implement on nRF52840DK multiples bluetooth mesh models.

I bought then a Thingy53 in order to exploit btmesh sensors models.

After unpacking Thingy I managed first to see it in the nRF EdgeImpulse App. Then I use the iOS nRF Programmer and manage to install via BLE others firmwares (btmesh examples) that worked very well. So far so good.

Then I wanted to upload other programs using the MCUboot bootloader and nRF Programmer on windows (since I do not have JTAG cable, nor nRF5340DK to flash the thingy).

Before uploading my own programs, I checked the procedure with the pre-compiled firmwares available here : https://www.nordicsemi.com/Products/Development-hardware/Nordic-Thingy-53/Downloads

I have followed the process here : https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/working_with_nrf/nrf53/thingy53_gs.html#updating-through-usb

everything looks ok, Thingy is well in bootloader mode, the images are all written successfully, but I cannot see anymore Thingy in nRF app (if I upload BTmesh examples), nor I cannot see Thingy in EdgeImpusle App if I upload EdgeImpusle firmware.

Did I miss something on how to flash the Thingy53?

 

Any help will be much appreciated. Thank you very much.

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