message: docs: How to identify the deviceID
diff: @@ -51,6 +51,7 @@ After a [discussion](https://github.com/OpenZWave/Zwave2Mqtt/issues/201) with Op
  - [Edit existing component](#edit-existing-component)
  - [Add new component](#add-new-component)
  - [Custom Components](#custom-components)
  + - [Identify the DeviceID](#identify-the-deviceid)
  - [Thermostats](#thermostats)
  - [Fans](#fans)
  - [:gift: MQTT APIs](#gift-mqtt-apis)
  @@ -404,6 +405,28 @@ At the moment auto discovery just creates components like `sensor`, `cover` `bin
  **UPDATE**: Starting from version 2.0.7 you can specify your custom devices configuration inside `store/customDevices(.js|.json)` file. This allows users that use Docker to create their custom hass devices configuration without the need to build a new container
  +#### Identify the DeviceID
  +
  +First (and easier) option is to add a random value in gateway values table for the desired device, the device id will be visible in first column of the table (`Devices`) between square brackets `[<deviceID>] Device Name`
  +
  +Second option would be to retrieve it from [here](https://github.com/OpenZWave/open-zwave/blob/master/config/manufacturer_specific.xml). Each device has Manufacturerid, product id and a product type in **HEX format** and needs to be converted in decimal:
  +
  +```xml
  +<Manufacturer id="019b" name="ThermoFloor AS">
  + <Product config="thermofloor/heatit021.xml" id="0001" name="Heatit Thermostat TF 021" type="0001"/>
  + <Product config="thermofloor/heatit056.xml" id="0202" name="Heatit Thermostat TF 056" type="0003"/>
  + <Product config="thermofloor/heatit-zdim.xml" id="2200" name="Heatit ZDim" type="0003"/>
  +</Manufacturer>
  +```
  +
  +In this example, if we have choose `Heatit Thermostat TF 056`:
  +
  +- Manufacturer Id: `19b` --> `411`
  +- Product Id: `202` --> `514`
  +- Product type: `3` --> `3`
  +
  +So in decimal format will become: `411-514-3`. This is the device id of `Heatit Thermostat TF 056`
  +
  #### Thermostats
  ```js
  