A weather station with a fronted UI and PHP backend was my first-ever web project. It has been 4 years since I finished it, and I've decided to do it again but with my current knowledge.
Another reason for this project is that I wanted to learn how to design schematics and PCBs. You can see the (hopefully) live data on the website.
The station uses a BME280 sensor to measure temperature, humidity and pressure. Besides uploading the data, it's also shown on a 0.96" OLED display (Not included in schematic).
The schematics and PCB use an ESP32-C3-MINI-N4, but because of the costs of manufacturing, assembly/stencil and shipping, I've decided to assemble it on a breadboard with an ESP32-WROOM devkit.
The schematics also include a 3.3V voltage regulator, USB type C for power and programming, and a IDC header for a PMS7003 air quality sensor that I could integrate later if I'd like to.
As for the future sensors, aside from the PM2.5 sensor, I'd like to add a rain sensor and an anemometer. The first one is cheap and easy to do, but the second one is not so much. Anemometers are expensive, and I don't have the tools to make one myself. Even if I had one, I do not have an appropriate location to install it.
The software for the station is in the driver folder. It's written in C++ and uses Arduino libraries. For the backend, I've decided to use Supabase, because of the REST database API and the real-time features which allowed an easy integration with the microcontroller.