homebridge-web-thermostat

Description

This homebridge plugin exposes a web-based thermostat to Apple's HomeKit. Using simple HTTP requests, the plugin allows you to set the thermostat mode and control the target temperature.

Installation

1. Install homebridge
2. Install this plugin: npm install -g homebridge-web-thermostat
3. Update your config.json file

Configuration

"accessories": [
     {
       "accessory": "Thermostat",
       "name": "Thermostat",
       "apiroute": "http://myurl.com"
     }
]

Core

Key	Description	Default
accessory	Must be Thermostat	N/A
name	Name to appear in the Home app	N/A
apiroute	Root URL of your device	N/A

Optional fields

Key	Description	Default
temperatureDisplayUnits	Whether you want °C (0) or °F (1) as your units	0
currentRelativeHumidity	Whether to include currentRelativeHumidity as a field in /status	false
heatOnly	Whether to only expose the heating characteristic, and not cooling/auto	false
maxTemp	Upper bound for the temperature selector in the Home app	30
minTemp	Lower bound for the temperature selector in the Home app	15
minStep	Minimum increment value for the temperature selector in the Home app	0.5
temperatureThresholds	Whether you want the thermostat accessory to have heating and cooling temperature thresholds	false

Additional options

Key	Description	Default
listener	Whether to start a listener to get real-time changes from the device	false
pollInterval	Time (in seconds) between device polls	300
timeout	Time (in milliseconds) until the accessory will be marked as Not Responding if it is unreachable	3000
port	Port for your HTTP listener (if enabled)	2000
http_method	HTTP method used to communicate with the device	GET
username	Username if HTTP authentication is enabled	N/A
password	Password if HTTP authentication is enabled	N/A
model	Appears under the Model field for the accessory	plugin
serial	Appears under the Serial field for the accessory	apiroute
manufacturer	Appears under the Manufacturer field for the accessory	author
firmware	Appears under the Firmware field for the accessory	version

API Interfacing

Your API should be able to:

1. Return JSON information when it receives /status:

{
    "targetHeatingCoolingState": INT_VALUE,
    "targetTemperature": FLOAT_VALUE,
    "currentHeatingCoolingState": INT_VALUE,
    "currentTemperature": FLOAT_VALUE
}

Note: You must also include the following fields in /status if enabled in the config.json:

• currentRelativeHumidity
• coolingThresholdTemperature & heatingThresholdTemperature

2. Set targetHeatingCoolingState when it receives:

/targetHeatingCoolingState?value=INT_VALUE

3. Set targetTemperature when it receives:

/targetTemperature?value=FLOAT_VALUE

4. (if enabled) Set coolingThresholdTemperature when it receives:

/coolingThresholdTemperature?value=FLOAT_VALUE

5. (if enabled) heatingThresholdTemperature when it receives:

/heatingThresholdTemperature?value=FLOAT_VALUE

Optional (if listener is enabled)

1. Update targetHeatingCoolingState following a manual override by messaging the listen server:

/targetHeatingCoolingState?value=INT_VALUE

2. Update targetTemperature following a manual override by messaging the listen server:

/targetTemperature?value=FLOAT_VALUE

3. (if enabled) Update coolingThresholdTemperature following a manual override by messaging the listen server:

/coolingThresholdTemperature?value=FLOAT_VALUE

4. (if enabled) Update heatingThresholdTemperature following a manual override by messaging the listen server:

/heatingThresholdTemperature?value=FLOAT_VALUE

HeatingCoolingState Key

Number	Name
0	Off
1	Heat
2	Cool
3	Auto