Shelly to ESPHome

To flash a Shelly to ESPHome, most of the instructions and files can be found here:

https://github.com/tasmota/mgos32-to-tasmota32/blob/main/README.md

https://devices.esphome.io/devices/Shelly-Plus-1PM

https://www.elusivecode.net/posts/ESPhome-on-Shelly-2.5-and-1pm/

Once installed Tasmota, flash to ESPHome. In ESPHome (in HA), go 'New Device,' name it, choose ESP32, choose download, compile and create the bin, and download the legacy bin. Upload/install that to the Shelly via the Tasmota interface.

The Shelly should now be able to be discovered in HA, so go ahead and do that and put it in an area. Then go into ESPHome and paste the YAML from the below link (be sure to set device name, API key, OTA password, etc), and install it on the Shelly:

https://devices.esphome.io/devices/Shelly-Plus-1PM#configuration-as-relay-with-overpower-and-overtemperature-protection