info.md

Home Assistant Custom Component for Bosch Nefit Easy thermostat

Configuration

All configuration can be done from within Home Assistant:

1. Go to Settings
2. Go to Integrations
3. At the bottom right, click Add Integration
4. Search for "Nefit" -> Nefit Easy Bosch Thermostat
5. Fill in your serial number, access key and password
6. Save

Limit sensors and switches

Just disable the enitities from UI you dont want. Those will not be updated anymore.

Available sensors & switches

Sensors

- year_total
- status
- supply_temperature
- outdoor_temperature
- system_pressure
- active_program
- hot_water_operation

Switches

- hot_water
- holiday_mode
- fireplace_mode
- today_as_sunday
- tomorrow_as_sunday
- preheating
- home_entrance_detection
- weather_dependent
- lockui

Debugging problems

Turn on debug for both aionefit as custom_components.nefiteasy:

logger:
  default: info
  logs:
    custom_components.nefiteasy: debug
    aionefit: debug

FAQ

HA cannot connect to Bosch cloud

If you experience errors during the boot of HA regarding the connection to the Bosch cloud ie Timeout while connecting to Bosch cloud. Retrying in the background, you may want to change the OpenSSL configuration. The OpenSSL defaults for Buster are causing the problem, probably because Nefit/Bosch is using either an outdated TLS version or an outdated cipher.

Edit /etc/ssl/openssl.cnf and change the system wide defaults back to their previous values(pre-Buster):

MinProtocol = None
CipherString = DEFAULT

https://www.debian.org/releases/stable/amd64/release-notes/ch-information.en.html#openssl-defaults