Official Honeywell evohome/Round Thermostat integration (EU-only)

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I resolved it as follows. Not quite sure what exactly was the problem. I believe the directory structures get corrupted somehow.

  1. Go to the config directory and look for the hidden directory “.storage”. Delete any “Evohome_custom” entries. On a Mac you make these files visible by pressing “cmd shift .”
  2. Delete the directory for “Evohome_custom” in the “custom_components” directory and all the files in it, especially the pycache directory.
  3. Go to the GitHub location for the official Evohome component. Copy all the files (is a bit cumbersome) and put them into a new custom_components directory called “evohome_custom”.
  4. In the “const.py” file change: DOMAIN = “evohome_custom”.
  5. In the “manifest.json” file change: “domain”: “evohome_custom”.
  6. In the same file ensure there is a version key entry: “version”: “1.0.0” #any version will do
  7. In the “init.py” file ensure you only have the following entries:
from homeassistant.const import (
    ATTR_ENTITY_ID,
    CONF_PASSWORD,
    CONF_SCAN_INTERVAL,
    CONF_USERNAME,
    TEMP_CELSIUS,
)
  1. Then in your config file refer to the proper component name.
evohome_custom:
  username: !secret evohome_username
  password: !secret evohome_password
  scan_interval: 300
  location_idx: 1 #or any other location you have defined
  1. Then check whether it is all correct, with “Configuration, settings, check configuration”.
  2. Repair any mistakes that are generated.
  3. If you get the error “evohome_custom” not found and you are sure to have executed above steps diligently, do a cold start of home assistant by briefly interrupting the power to your machine. A restart from the “configuration, settings” will not work. After a cold start the “evohome_custom” directory will be recognised.