MMM-NestRemoteThermostat

This is a module for the MagicMirror² to display a Nest Like thermostat from a remote sensor that is capable to POST the measured values through HTTP protocol. It is designed to be generic. Useful when having Home Assistant and Magic Mirror.

For updates, please check the CHANGELOG.

Features

When the page load, the first state will be loading until the module receive data :

{
    state: "off",	// Can be any thing between : ['off', 'heating', 'cooling', 'fan', 'dry' ]
    loading: true
}

---

Here is the state of the module when Heating with and without fan speed :

{
    thermostatId: '1',
    targetTemperature: 20,
    ambientTemperature: 21.5,
    state: "heating",
    icon: "fan",
    power: 3 // 0 to hide fan icon
}

---

Here is the state of the module when Cooling with and without fan speed :

{
    thermostatId: '1',
    targetTemperature: 19,
    ambientTemperature: 23.5,
    state: "cooling",
    icon: "fan",
    power: 5 // 0 to hide fan icon
}

---

Here is the state of the module when in Fan with and without fan speed :

{
    thermostatId: '1',
    targetTemperature: 21.5,
    ambientTemperature: 21.5,
    state: "fan",
    icon: "fan",
    power: 1 // 0 to hide fan icon
}

---

Here is the state of the module when in Dry with and without fan speed :

{
    thermostatId: '1',
    targetTemperature: 19.5,
    ambientTemperature: 19.5,
    state: "dry",
    icon: "fan",
    power: 4 // 0 to hide fan icon
}

Test it your self

If you want to see how the thermostat look like in any state or play with the configuration easily, simply download this repository localy extract it and open example/example.html

Using the module

To use this module follow these steps:

1. Switch to the modules folder of your MagicMirror

cd ~/MagicMirror/modules/

2. Clone this repository to the modules folder

git clone https://github.com/sisimomo/MMM-NestRemoteThermostat.git

3. Switch to the MMM-NestRemoteThermostat folder

cd ./MMM-NestRemoteThermostat/

4. Install the 3rd party dependencies

npm install

5. Add the following configuration block to the modules array in the config/config.js file:

var config = {
  modules: [
    {
      module: 'MMM-NestRemoteThermostat',
      position: 'top_right',
      config: {
        thermostatId: '1'
      }
    }
  ]
}

To put in fahrenheit

var config = {
  modules: [
    {
      module: 'MMM-NestRemoteThermostat',
      position: 'top_right',
      config: {
        thermostatId: '1',
        minValue: 50, // Minimum value for target temperature
        maxValue: 86 // Maximum value for target temperature
      }
    }
  ]
}

!! IMPORTANT !!

For security reasons the MagicMirror is not reachable externally, which also means that it does not accept data from external sources. Make sure you configure the ipWhitelist setting in the config.js file (see these lines in the sample config) correctly, so the remote thermostat can communicate with your mirror.

Configuration options

Option	Description
thermostatId	REQUIRED An arbitrary value that determines from which thermostat this module accepts updates. It can also be used as an API key to restrict access to your mirror. Type: String Default value: null (must be configured)
width	The css width of the thermostat. Type: String Default value: '20em'
height	The css height of the thermostat. Type: String Default value: '20em'
minValue	The lowest displayable value on the dial of the thermostat. Type: Integer Default value: 10
maxValue	The bigest displayable value on the dial of the thermostat. Type: Integer Default value: 30
numTicks	Number of tick lines to display around the dial. Type: Integer Default value: 150
largeBarThickness	Increase of size for large tick line in pixel. Type: Integer Default value: 2.5
iconSize	The size in px of the fan icon. Type: Integer Default value: 50
targetTemperaturePrecision	Set the level of precision for display of the target temperature. E.g., .5 will round to the nearest half degree, and 1 will round to the nearest degree. (You can set any number you want, but only one decimal place will be displayed at most.) Type: Float Default value: .5
ambientTemperaturePrecision	Set the level of precision for display of the target temperature. E.g., .5 will round to the nearest half degree, and 1 will round to the nearest degree. (You can set any number you want, but only one decimal place will be displayed at most.) Type: Float Default value: .5
roundTargetTemperature	DEPRECATED You should remove this from your config file if you have one set, otherwise it could override targetTemperaturePrecision.
roundAmbientTemperature	DEPRECATED You should remove this from your config file if you have one set, otherwise it could override ambientTemperaturePrecision.
diameter	The diamiter of the dial. Dosen't affect the size of the dial but the size of the elements on the dials. Type: Integer Default value: 400

How it works

This module creates a new HTTP endpoint on the mirror's webserver, which handles HTTP POST requests sent by the remote thermostats. The HTTP request must contain the unique identifier you assigned to the thermostat. The module displays the measured value only if the configured thermostatId matches the value received in the request.

It is up to the thermostat to define how often it updates the measured data, the mirror will display the last received value.

Thermostat requirements and communication

This module can work with any thermostat that is capable to periodically send HTTP POST requests with the following standard JSON body to the http://<your mirror's IP>:8080/remote-nest-thermostat endpoint:

{
    thermostatId: '1',
    targetTemperature: 19.5,
    ambientTemperature: 19.5,
    state: "dry",
    icon: "fan",
    power: 5,
    loading: false
}

If you want, you can update only the some proprieties. To do so, only specified the proprieties you want to change. The only condition is for the propriety loading.

Option	Description
thermostatId	REQUIRED The arbitrary value set in the config file of the desired thermostat. Type: String
loading	REQUIRED The loading status can be set when ever wanted. When set, it will hide every thing displayed on the dial. Type: Boolean Default value: true
targetTemperature	The value that is display in the middle of the thermostat. Type: Integer
ambientTemperature	The value that is display next to the ambient temperature bar of the thermostat. Type: Integer
state	The state of the thermostat. Can be 'Off', 'Cooling', 'Heating' , 'Fan' or 'Dry'. The background color of the dial also change accordingly. Type: String Possible values: [ 'off', 'heating', 'cooling', 'fan', 'dry' ]
icon	The icon of the thermostat. Can be 'Fan', 'Radiator'. Type: String Possible values: [ 'fan', 'radiator' ]
power	The speed of the fan. This value can be set between 0-5. If set to 0, no icon will be show. When first loaded, the value is set to 0. Type: Integer Possible values: [ 0, 1, 2, 3, 4, 5 ]

Make sure that your thermostat properly sets the Content-Type header in the HTTP request to application/json, otherwise the module will not be able to parse the request body.

Localization

Currently this module supports English (en) and French (fr) languages. The language can be specified in the global language setting in the config.js file.

Want to see more languages? Please contribute!

Got feedback ?

Your feedback is more than welcome, please send your suggestions, feature requests or bug reports as Github issues.

Acknowledments

Many thanks to Michael Teeuw for creating and maintaining the MagicMirror² project fully open source.

Base on Magic Mirror Module: MMM-RemoteTemperature By György Balássy

Base on codepen.io example CodePen Home Nest Thermostat Control By Dal Hundal

About the author

This project is created and maintained by Simon Vallières.