I recently completed a DIY project that I’m really excited about sharing! I built a wifi-based temperature and humidity sensor using an ESP8266 microcontroller and a DHT22 sensor. The goal was to integrate it into my OpenHAB setup for better climate monitoring in my home. Here’s how it all came together:The Build Process The project started with sourcing the components: an ESP8266 module, a DHT22 sensor, and a small PCB board. I designed the PCB myself to keep the footprint small—around 5x5 cm. soldering everything together took about 30 minutes, and I must say, it was a great learning experience!Integration with OpenHAB Once the hardware was ready, I moved on to the software part. I wrote a simple sketch for the ESP8266 to read the sensor data and send it to my OpenHAB server via MQTT. The hardest part was getting the MQTT connection right, but after some troubleshooting, everything started working smoothly.Results and Benefits The sensor is now seamlessly integrated into my OpenHAB setup, providing real-time temperature and humidity readings. I’ve set up rules to adjust my HVAC system based on these readings, which has already helped reduce energy consumption. Seeing the data update in real-time in my OpenHAB interface is incredibly satisfying!Tips for Others If you’re thinking of undertaking a similar project, here are a few tips:- Start with a clear plan for data transmission (MQTT, HTTP, etc.).- Test each component individually before integrating them.- Don’t hesitate to consult online forums or communities for support.This project has not only enhanced my smart home setup but also reignited my passion for DIY electronics. I’m already brainstorming my next project—maybe a smart lighting system or an energy monitor!If anyone has questions or needs help with their own DIY projects, feel free to reach out. Happy building! 