NoLongerEvil Home Assistant Add-on

A Home Assistant Add-on that provides self-hosted Nest thermostat control via the NoLongerEvil API. Control your Nest thermostats locally without relying on external cloud services.

Installation

Quick Install

1. Click the button below to add this repository to your Home Assistant instance:

   

2. Find NoLongerEvil HomeAssistant in the Add-on store and click Install

3. Configure the Add-on (see Configuration below)

4. Start the Add-on

5. Select "Watchdog" to restart the server if it crashes

6. (Optional) Select "Add to sidebar" for ease of use during thermostat configuration

Manual Installation

1. Navigate to Settings > Add-ons > Add-on Store

2. Click the menu icon (three dots) in the top right and select Repositories

3. Add this repository URL:

   https://github.com/codykociemba/NoLongerEvil-HomeAssistant
   

4. Click Add and close the dialog

5. Find NoLongerEvil HomeAssistant in the store and click Install

Requirements

• Home Assistant OS (not Home Assistant Container) - Learn more
• Mosquitto broker add-on - Required for MQTT integration

Configuration

After installing the add-on, configure it on the "Configuration" tab via the Home Assistant UI:

Option	Required	Default	Description
api_origin	Yes	http://<homeassistant_IP>:9543	Full URL where Nest devices reach this add-on (protocol + host + port)
entry_key_ttl_seconds	No	3600	How long entry keys remain valid (seconds)
debug_logging	No	false	Enable verbose logging for troubleshooting
mqtt_host	No	(auto-detected)	MQTT broker hostname (leave empty to use Mosquitto add-on)
mqtt_port	No	1883	MQTT broker port
mqtt_user	No	(empty*)	MQTT username for authentication
mqtt_password	No	(empty*)	MQTT password for authentication

• Fields can be empty under HAOS. Enter your credentials if you're using an external MQTT broker.

Example Configuration

api_origin: "http://192.168.1.100:9543"
entry_key_ttl_seconds: 3600
debug_logging: false

Network Ports

Port	Purpose	Access
9543 (host) → 8000 (container)	Nest device communication	External (configurable)
8081	Control API	Internal only
8082	Web UI	Ingress only

Thermostat Configuration - ssh

If the firmware flashing process (https://docs.nolongerevil.com/hosted/overview) did not ask how you want to connect the device, you'll need to configure the thermostat for self-hosting. (Choice of hosted or self-hosted feature during flashing is pending.)

1. ssh to your thermostat

   ssh root@<nest_ip>
   

2. Password is

   nolongerevil
   

3. Use vi to edit the config file

   vi /etc/nestlabs/client.config
   

4. Press "i" to edit
5. Find <a key="cloudregisterurl" value="https://backdoor.nolongerevil.com/"/> and update to

   <a key="cloudregisterurl" value="http://<homeassistant_IP>:9543/entry"/>
   

   DO NOT OMIT /entry FROM THE URL
6. Press escape to exit vi edit mode, then :wq to write the file and quit the vi editor
7. Enter reboot to reboot your device.
8. Once rebooted, on the thermostat, go to Settings (gear icon) -> Nest App -> Get Entry Key to generate an entry key for device pairing.

Register with NoLongerEvil Add-on in Home Assistant

1. Go to Home Assistant > Settings > Add Ons > NoLongerEvil HomeAssistant > Configuration
2. In the Home Assistant NLE Web UI, enter the 7-character pairing code from your Nest thermostat and click Register
3. Devices will appear in Home Assistant via MQTT discovery

Community

• NoLongerEvil Discord - Join #nle-home-assistant channel
• GitHub Issues - Bug reports and feature requests

Related Projects

• NoLongerEvil Thermostat - Core API server
• Home Assistant Nest Integration - Alternative integration

Contributing

See the CONTRIBUTING guide for development setup instructions.

License

This project is licensed under the MIT License - see the LICENSE file for details.