M5Stack Smart Plant Watering

• Collects soil moisture, air humidity, temperature and pressure
• Button push (A) for watering
• Reuses configured Wifi connection
• Publishes Home Assistant state
• Support Home Assistant auto-discovery
• Reconnect to Wifi with a button (B)
• Send manual MQTT configuration and state with a button (C)
• Signal lack of water with RGB bar (on M5Stack Fire) and warning image

Hardware

• Plug the ENV unit in Port A
• Plug the Watering unit in port B
• Plant the Watering unit in the soil
• Connect the internal pipe of the watering unit to a water source
• Put the external pipe of the watering unit in the soil
• Boot the M5Stack in Wifi mode

Software

• Download or clone this same repository
• Open M5Stack UI Flow and connect your M5Stack using the API Key
• Open the src/drunken_plant.m5f file in M5Stack UI Flow

 

In the readSensors function, update the from low and from high values according to your Watering unit calibration.

• Update the MQTT configuration in the code to suit your own MQTT server.
• Still in UI Flow, use the Manager to upload the code and images to the device.

Note: Swap Unit Env II with Unit Env III in UI Flow if needed as the former has reached its end of life 

• When started, the application connects to the existing Wifi, initiates the MQTT client configuration and publishes the Home Assistant discovery message.
• Every 30 seconds, it reads the sensors values, updates the displayed values and publishes the state messages for Home Assistant on MQTT.
• Press button A to start watering. Release the button to stop.
• Press button B to re-initiate the Wifi connection sequence (will be triggered only when disconnected).
• Press button C to manually publish the Home Assistant configuration and sensors state to MQTT.

• Icons for button actions
• Watering via MQTT
• Show battery and Wifi status

Code

https://github.com/kernelcontrol/m5stack-smart-plant-watering

Software apps and online services

https://flow.m5stack.com/