higrow-mqtt-sender

Firmware for the HiGrow Plants Monitoring Sensor that sends sensor readings to a MQTT broker

Overview

The firmware will send the following values to a MQTT topic named higrow_plant_monitor/$device_id/state:

• device_id - equals the MAC address of the builtin ESP32)
• temperature_celsius - Air temperature recorded by the DHT11 sensor
• humidity_percent - Air humidity recorded by the DHT11 sensor
• water - Soil water level (0..1, calibrated with air / a glass of water)
• light - Taken from the official firmware, but seems not to work with older versions of the board. Not calibrated.

Deployment

Declare the following environment variables according to your environment:

WIFI_SSID
WIFI_PASS
MQTT_BROKER_HOST
MQTT_BROKER_PORT

Connect the device via USB and flash it with platformio:

platformio run --target upload