home-assistant.io/source/_integrations/arest.markdown

title	description	ha_category	ha_iot_class	ha_release	ha_domain	ha_platforms	ha_integration_type
aREST	Instructions on how to integrate aREST within Home Assistant.	Binary Sensor DIY Sensor Switch	Local Polling	0.9	arest	binary_sensor sensor switch	integration

There is currently support for the following device types within Home Assistant:

• Binary Sensor
• Sensor
• Switch

Binary Sensor

The arest binary sensor platform allows you to get all data from your devices (like Arduinos with an ethernet/Wi-Fi connection, the ESP8266, and the Raspberry Pi) running the aREST RESTful framework.

To use your aREST binary sensor in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
binary_sensor:
  - platform: arest
    resource: http://IP_ADDRESS
    pin: 8

{% configuration %} resource: description: IP address and schema of the device that is exposing an aREST API, e.g., http://192.168.1.10. required: true type: string pin: description: Number of the pin to monitor. required: true type: integer name: description: Let you overwrite the name of the device. By default name from the device is used. required: false type: string {% endconfiguration %}

Accessing the URL http://IP_ADDRESS/digital/PIN_NUMBER should give you the state of the pin inside a JSON response as return_value.

$ curl -X GET http://192.168.0.5/digital/9
{"return_value": 0, "id": "office1", "name": "Office", "connected": true}

An example for Pin 9 inspired by the command above could look like this:

# Example configuration.yaml entry
binary_sensor:
  - platform: arest
    resource: http://192.168.0.5/digital/9
    pin: 9
    name: Office

This sensor is not suitable for fast state changes because there is a high possibility that the change took place between two update cycle.

Sensor

The arest sensor platform allows you to get all data from your devices (like Arduinos with a Ethernet/Wi-Fi connection, the ESP8266, and the Raspberry Pi) running the aREST RESTful framework.

To use your aREST enabled device in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
sensor:
  - platform: arest
    resource: https://IP_ADDRESS
    monitored_variables:
      temperature:
        name: temperature
    pins:
      A0:
        name: Pin 0 analog

{% configuration %} resource: description: "IP address and schema of the device that is exposing an aREST API, e.g., https://192.168.1.10." required: true type: string name: description: Let you overwrite the name of the device. required: false default: aREST sensor type: string pins: description: List of pins to monitor. Analog pins need a leading A for the pin number. required: false type: list keys: pin: description: Pin number to use. required: true type: list keys: name: description: The name of the variable you wish to monitor. required: true type: string unit_of_measurement: description: Defines the unit of measurement of the sensor, if any. required: false type: string value_template: description: Defines a template to extract a value from the payload. required: false type: template monitored_variables: description: List of exposed variables. required: false type: list keys: variable: description: Name of the variable to monitor. required: true type: list keys: name: description: The name to use for the frontend. required: false type: string unit_of_measurement: description: Defines the units of measurement of the sensor, if any. required: false type: string value_template: description: Defines a template to extract a value from the payload. required: false type: template {% endconfiguration %}

The variables in the monitored_variables array must be available in the response of the device. As a starting point you could use the one of the example sketches (eg. Ethernet for an Arduino with Ethernet shield). In those sketches are two variables (temperature and humidity) available which will act as endpoints.

Accessing one of the endpoints (eg. http://192.168.1.10/temperature) will give you the value inside a JSON response.

{"temperature": 23, "id": "sensor01", "name": "livingroom", "connected": true}

The root will give you a JSON response that contains all variables and their current values along with some device details.

{
   "variables" : {
      "temperature" : 23,
      "humidity" : 82
   },
   "id" : "sensor01",
   "name" : "livingroom",
   "connected" : true
}

return_value contains the sensor's data in a JSON response for a given pin (eg. http://192.168.1.10/analog/2/ or http://192.168.1.10/digital/7/).

{"return_value": 34, "id": "sensor02", "name": "livingroom", "connected": true}

Switch

The arest switch platform allows you to toggle pins of your devices (like Arduino boards with an Ethernet/Wi-Fi connection, ESP8266 based devices, and the Raspberry Pi) running the aREST RESTful framework.

To use your aREST enabled device with pins in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
switch:
  - platform: arest
    resource: http://IP_ADDRESS
    pins:
      11:
        name: Fan
      13:
        name: Switch
        invert: true

If you want to use custom functions, then add the following to your configuration.yaml file:

# Example configuration.yaml entry
switch:
  - platform: arest
    resource: http://IP_ADDRESS
    name: Office
    functions:
      function1:
        name: Light Desk

{% configuration %} resource: description: IP address and schema of the device that is exposing an aREST API, e.g., http://192.168.1.10 (no-trailing slash) required: true type: string name: description: Let you overwrite the name of the device. By default name from the device is used. required: false type: string pins: description: An array with all used pins. required: false type: map keys: name: description: The name of the pin to use in the frontend. required: true type: string invert: description: If the logic for on/off should be inverted. required: false type: boolean default: false functions: description: An array with all used functions. required: false type: map keys: name: description: The name to use in the frontend. required: true type: string {% endconfiguration %}

You can still switch your pins with a web browser or a command line tool. Use the URL http://192.168.1.10/digital/8/1 to set pin 8 to high/on, the JSON response will give you the feedback.

{"message": "Pin D8 set to 1", "id": "sensor02", "name": "livingroom", "connected": true}