I’ve got two new Shelly PM mini gen 3’s flashed to esphome, but running into issues flashing new “prod” images. The devices are not bricked.
I’ve followed these steps in a “temp” environment:
So, the “temp” environment is based on Read/Write bootloader, partition table and any partition via OTA by angelnu · Pull Request #5535 · esphome/esphome · GitHub
After this I’m using my regular “prod” esphome environment (latest version) to create and upload a new image.
However, this gives me this error:
ERROR Error auth: Unexpected response from ESP: 0x04
The log output on Shelly shows:
16:20:25 [W] [ota:380] Failed to read 1 bytes of data, errno: 104
16:20:25 [E] [ota:282] Reading command failed!
16:20:25 [W] [ota:411] Failed to write 1 bytes of data, errno: 104
Now… When I go to the “temp” environment and compile the bigger config (from prod), then it does upload successfully.
I’ve played around with clearing the OTA password, safe_boot and using OTA version 1 etc. Nothing allowed the prod image to be uploaded.
The only difference between “temp” and “prod” config is “unprotected_writes: True” under ota: as required for the initial flashing and the addition of " - platform: esphome" under ota as per thew new structure.
The weird thing is that my other Shelly PM mini gen3’s are working just fine. It’s just these 2 newer ones.
This ain’t a massive thing as I can make changes, but it would be nice to be able to upgrade esphome. Now they’re stuck on 2024.1.0-dev 
Hope anyone has some clues. Happy to provide any further details if required of course!