Mi Flora Bridge

This arduino sketch implements an ESP32 BLE client for XIaomi Mi Flora Plant sensors, pushing the meaasurements to an MQTT server.

It is a direct copy of this repository by sidddy, made to effortlessly build with platformio.

Things you definitly need to change in the config.h

• the MAC adress of your flora device
• your wifi name
• your wifi password
• your mqtt host adress
• your mqtt password

Technical requirements

Hardware:

• ESP32
• Xiaomi Mi Plant Sensor (firmware revision >= 2.6.6)

Software:

• MQTT server

Measuring interval

The ESP32 will perform a single connection attempt to the Xiaomi Mi Plant sensor, read the sensor data & push it to the MQTT server. The ESP32 will enter deep sleep mode after all sensors have been read and sleep for X minutes before repeating the exercise... Battery level is read every Xth wakeup. Up to X attempst per sensor are performed when reading the data fails.

Configuration

• SLEEP_DURATION - how long should the device sleep between sensor reads?
• EMERGENCY_HIBERNATE - how long after wakeup should the device forcefully go to sleep (e.g. when something gets stuck)?
• BATTERY_INTERVAL - how ofter should the battery status be read?
• RETRY - how ofter should a single device be tried on each run?

Credits

• sidddy
• Many thanks go to the guys at https://github.com/open-homeautomation/miflora for figuring out the sensor protocol.