ESP32 + BME280 weather station over MQTT
Measure temperature, humidity and pressure, send them to Home Assistant, and run on battery thanks to deep sleep.
Master the ESP32,
from idea to a working device.
A place to share DIY projects, wiring diagrams, source code and the hard-earned lessons of building IoT with the ESP32. Everything is tested on real hardware.
Browse projects Read the experience notesFeatured projects
Control a relay over WiFi with ESPHome
Switch lights and fans from your phone with a few dozen lines of YAML, no C++ needed.
ESP32-CAM: live video in your browser
Flash the code, avoid the classic power problems, and stream MJPEG on your LAN.
Latest notes
ESP32, S3, C3, C6: which one to buy?
A quick comparison of the chip families so you don't buy the wrong one.
ESP32 GPIO pins to avoid
Strapping pins, ADC2 vs WiFi, flash pins: read this before wiring.
Deep sleep: months of battery life on an ESP32
How to sleep, wake, keep data, and the mistakes that silently drain the battery.