Connecting a sensor to the grove port of the device allows the sensor to use the device's power supply and Wi-Fi connection. Home Assistant can then detect the sensor and start using it. This page provides configuration details for a few selected sensors.

Notice

Connecting devices to the grove port and reassembling your own firmware can void the warranty.

Prerequisites

Home Assistant Voice Preview Edition set up and running in Home Assistant
Opened the grove port
Have one ore more external sensors, such as:
- M5Stack SHT40-BMP280 temperature, humidity, air pressure sensor
- M5Stack PIR motion sensor
- M5Stack SGP30 TVOC, eCO2 gas sensor
- M5Stack BH1750 ambient light sensor
If you are adding more than one sensor, you need an expansion unit like this grove hub

Connecting a sensor to the grove port

Step 1

Take control of the device in the ESPHome add-on

Go to Settings > Add-ons and install the ESPHome Device Builder add-on.
Start the add-on and select Open web UI.
On the Home Assistant Voice card, select Take control, and follow the steps of the installer.

Step 2

Install a new device configuration

To open the device configuration file, on the Home Assistant Voice card, select Edit.

In the configuration file, under packages, add the configuration for the sensor.

In this example, we are adding the configuration for the M5Stack SHT40-BMP280 temperature, humidity, air pressure sensor.


          packages:
        grove-i2c: github://esphome/home-assistant-voice-pe/modules/grove-i2c.yaml
      sensor:
        - platform: sht4x
          i2c_id: grove_i2c
          temperature:
            name: Temperature
          humidity:
            name: Humidity

        - platform: bmp280_i2c
          i2c_id: grove_i2c
          address: 0x76
          pressure:
            name: Pressure

For other sensors, refer to the section on Configuration data for selected sensors.

Now, you need to recompile the firmware with the new configuration settings. To start the process, select Install.
Wait for the compilation to complete. Depending on your hardware, this may take a while.

Step 3

Connect the sensor to the grove port

Disconnect the device from power.
Connect the sensor to the grove port.
- Mind the color coding. Make sure the black cable is connected to the ground (GND) pin.
Reconnect the device to the power supply.

Step 4

Open the ESPHome integration page

Go to Settings > Devices & services and select the ESPHome integration.
From the list, under Home Assistant Voice, select Device.

Step 5

View the sensor data

On the device page, under Sensors you can view the new sensor data.

Configuration data for selected sensors

Example 1

PIR motion sensor

Configuration for the M5Stack PIR motion sensor.

        packages:
          grove-power: github://esphome/home-assistant-voice-pe/modules/grove-power.yaml
        binary_sensor:
          - platform: gpio
            pin:
              number: 2
            name: Motion
            device_class: motion

Example 2

SGP30 TVOC, eCO2 gas sensor

Configuration for the M5Stack SGP30 TVOC, eCO2 gas sensor.

        packages:
          grove-i2c: github://esphome/home-assistant-voice-pe/modules/grove-i2c.yaml
        sensor
          - platform: sgp30
            i2c_id: grove_i2c
            tvoc:
              name: "TVOC"
            eco2:
              name: "eCO2"

Example 3

Ambient light sensor

Configuration for the M5Stack BH1750 ambient light sensor.

        packages:
          grove-i2c: github://esphome/home-assistant-voice-pe/modules/grove-i2c.yaml
        sensor:
          - platform: bh1750
            i2c_id: grove_i2c
            name: "Light Intensity"