Mi Flora plant sensor


The miflora sensor platform allows one to monitor to plants. The Mi Flora plant sensor is a small Bluetooth Low Energy device that monitors not only the moisture, but also light, temperature and conductivity. As only a single BLE device can be polled at the same time, the library implements locking to make sure this is the case.

Start a scan to determine the MAC addresses of the sensor:

$ sudo hcitool lescan
LE Scan ...
F8:04:33:AF:AB:A2 [TV] UE48JU6580
C4:D3:8C:12:4C:57 Flower mate
[...]

Check for Flower care or Flower mate entries, those are your sensor.

To use your Mi Flora plant sensor in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
sensor:
  - platform: miflora
    mac: 'xx:xx:xx:xx:xx:xx'
    monitored_conditions:
      - temperature
  • mac (Required): The MAC address of your sensor.
  • monitored_conditions array (Optional): The parameters that should be monitored (defaults to monitoring all parameters).
    • moisture: Moisture in the soil.
    • light: Brightness at the sensor’s location.
    • temperature: Temperature at the sensor’s location.
    • conductivity: Conductivity in the soil.
    • battery: Battery details.
  • name (Optional): The name displayed in the frontend.
  • force_update (Optional): Sends update events even if the value hasn’t changed.
  • median (Optional): Sometimes the sensor measurements show spikes. Using this parameter, the poller will report the median of the last 3 (you can also use larger values) measurements. This filters out single spikes. Median: 5 will also filter double spikes. If you never have problems with spikes, median: 1 will work fine.
  • timeout (Optional): Define the timeout value in seconds when polling (defaults to 10 if not defined)
  • retries (Optional): Define the number of retries when polling (defaults to 2 if not defined)
  • cache_value (Optional): Define cache expiration value in seconds (defaults to 1200 if not defined)
  • adapter (Optional): Define the Bluetooth adapter to use (defaults to hci0). Run hciconfig to get a list of available adapters.

Note that by default the sensor is only polled once every 15 minutes. This means with the median: 3 setting will take as least 30 minutes before the sensor will report a value after a Home Assistant restart. As the values usually change very slowly, this isn’t a big problem. Reducing polling intervals will have a negative effect on the battery life.

A full configuration example could looks the one below:

# Example configuration.yaml entry
sensor:
  - platform: miflora
    mac: 'xx:xx:xx:xx:xx:xx'
    name: Flower 1
    force_update: false
    median: 3
    monitored_conditions:
      - moisture
      - light
      - temperature
      - conductivity
      - battery