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Tutorial for establishing a connection between an iGrill temperature probe and Hass.io Home Assistant

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# igrill-hassio
Tutorial for establishing a connection between an iGrill temperature probe and Hass.io Home Assistant

## Introduction of my Use Case
I like the iGrill device, and have invested in four probes. I do not like my being tied to the bluetooth range of my grill when using Weber's application to monitor the iGrill. I also do not like the features creeping into Weber's application that call out of my network to Weber properties nor those that require a 'Weber-ID'.

My objectives were:
* Be able to walk away from my grill and continue monitoring temperatures
* Keep data within my home network when possible
* Dockerize the iGrill monitor to ensure it never dies and make repeating installation easy

## Hardware Components
* iGrill v2
* 2x Raspberry Pi 4 Model B, both running [Raspbian](https://www.raspberrypi.org/downloads/raspbian/)
  * *Home Assistant Raspberry Pi*: The first Raspberry Pi maintains [Hass.io](https://www.home-assistant.io/hassio) and the [Mosquitto broker](https://github.com/home-assistant/hassio-addons/blob/master/mosquitto/README.md)
  * *iGrill Monitor Raspberry Pi*: The second Raspberry Pi maintains the [iGrill monitoring and data publishing scripts](https://github.com/bendikwa/igrill)
    * _This tutorial also works on a single Raspberry Pi. I use two because my grill is not within Bluetooth range of my primary Raspberry Pi._

## Step-by-Step Instructions to Configure the Broker
* Install both Docker and Docker Compose following instructions in this [documentation](https://withblue.ink/2019/07/13/yes-you-can-run-docker-on-raspbian.html)
* Install Hass.io as a docker container following instructions in the [documentation](https://github.com/home-assistant/hassio-installer)
* In the Hass.io Add-On Store, install the [Mosquitto broker](https://github.com/home-assistant/hassio-addons/blob/master/mosquitto/README.md)
  * Follow all of the documentation in the `Installation` and `How to use` sections of the documentation
  * In addition, navigate to the configuration section on the add-ons page and create a `USERNAME` and `PASSWORD` in the logins array that matches the `USERNAME` and `PASSWORD` you created for Home Assistant, as shown below:
    * _While the documentation explicitly notes that this is not required, I found discussion suggesting it on [Reddit](https://www.reddit.com/r/homeassistant/comments/c8r8fc/mqtt_hassio_embedded_broker_need_help/esqlhq3/) and it resolved my issue._
```json
{
  "logins": [
    {
      "username": "USERNAME",
      "password": "PASSWORD"
    }
  ],
  "anonymous": false,
  "customize": {
    "active": false,
    "folder": "mosquitto"
  },
  "certfile": "fullchain.pem",
  "keyfile": "privkey.pem",
  "require_certificate": false
}
```
* Test that the broker is listening for published data by following the Home Assistant [MQTT testing documentation](https://www.home-assistant.io/docs/mqtt/testing/)
  * Skip the first two paragraphs, and use the `Developer Tools` method, which is built into Home Assistant

## Step-by-Step Instructions to Install  Configure bendiwka's [iGrill Monitor](https://github.com/bendikwa/igrill)
* Install both Docker and Docker Compose following instructions in this [documentation](https://withblue.ink/2019/07/13/yes-you-can-run-docker-on-raspbian.html)
* Create a directory with the docker and monitor configuration files in this repo by using the command `git clone https://github.com/WilliamAlexanderMorrison/igrill-hassio.git`
* Navigate into the igrill-hassio directory 
* Open the `device.yaml` configuration file 
  * Replace `XX:XX:XX:XX:XX:XX` with the Bluetooth MAC address of your iGrill as needed
    * I was able to obtain this in Raspbian with the command `sudo hcitool lescan`
  * Make any other configuration changes as desired
* Open the `mqtt.yaml` configuration file
  * Replace `IPHOSTNAME` with the IP of your Raspberry Pi with the Broker
  * Replace `USERNAME` to match the `USERNAME` you created for Home Assistant/Mosquitto broker
  * Replace `PASSWORD` to match the `PASSWORD` you created for Home Assistant/Mosquitto broker
  * Make any other configuration changes as desired
* Follow both of the [troubleshooting](https://github.com/bendikwa/igrill#troubleshooting) instructions provided by bendikwa
* Reboot your Raspberry Pi
* Build the docker with the command `sudo docker-compose build`
  * This will create a docker container with bendiwka's iGrill Monitor repo
* Turn on your iGrill, plug in a probe
  * Also verify that no devices are already connected to it like your phone running the Weber app
* Start the docker container with the command `sudo docker-compose up -d`
* Test that the monitor is pushing data to the Mosquitto broker by navigating to the MQTT Developer Tools within Home Assistant, and set the Listen to a Topic to `#` (all) channels and Start Listening
  * You should see a temperature update and a battery update about every 20 seconds

## Recommendation for Sensor Configuration and Lovelace UI/UX
* Stog's post on the [Home Assistant community boards](https://community.home-assistant.io/t/weber-igrill-2-integration-with-lovelace-ui/61880) contains much inspiration and pre-written configurations
* In the Home Assistant configuration, add [MQTT Sensors](https://www.home-assistant.io/integrations/sensor.mqtt/)
```yaml
sensor:
  - platform: mqtt
    state_topic: "cooking/grill/probe1"
    name: "Probe 1"
    qos: 0
    unit_of_measurement: "ºF"
  - platform: mqtt
    state_topic: "cooking/grill/probe2"
    name: "Probe 2"
    qos: 0
    unit_of_measurement: "ºF"
  - platform: mqtt
    state_topic: "cooking/grill/probe3"
    name: "Probe 3"
    qos: 0
    unit_of_measurement: "ºF"
  - platform: mqtt
    state_topic: "cooking/grill/probe4"
    name: "Probe 4"
    qos: 0
    unit_of_measurement: "ºF"
  - platform: mqtt
    state_topic: "cooking/grill/battery"
    name: "iGrill Battery"
    qos: 0
    unit_of_measurement: "%"
```
* Restart your Home Assistant to start picking up data from new sensors
* In the Lovelace configuration, add an [entities card](https://www.home-assistant.io/lovelace/entities/) to your preferred view to see the sensors
```yaml
views:
  - badges: []
    cards:
      - type: entities
        show_header_toggle: false
        title: Weber iGrill
        entities:
          - entity: sensor.probe_1
            icon: 'mdi:thermometer'
            secondary_info: last-changed
          - entity: sensor.probe_2
            icon: 'mdi:thermometer'
            secondary_info: last-changed
          - entity: sensor.probe_3
            icon: 'mdi:thermometer'
            secondary_info: last-changed
          - entity: sensor.probe_4
            icon: 'mdi:thermometer'
            secondary_info: last-changed
          - entity: sensor.igrill_battery
            icon: 'mdi:battery-bluetooth'
            secondary_info: last-changed
    icon: 'mdi:pig'
    path: igrill
    title: iGrill
```

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