Case study
Outdoor weather sensor
A battery ESP32 reads a DHT22 on a schedule and publishes outdoor temperature and humidity to the dashboard.
Why
We wanted local weather on the dashboard and outdoor readings available to other gadgets that need them, such as water tank monitor v2.
How
The ESP32 wakes on an interval stored on the board, reads the DHT22, and sends temperature and humidity over MQTT to the dashboard.
Outdoor air temperature is also fed into water tank monitor v2 level math when that device is online.
ESP32 + DHT22