Smart Airpurifier

I have developed a smart air purifier with my mechanical engineer roommate. We used a fan from my work and he designed a housing. I designed a PCB using the esp32 as well as an attiny, which acted as an AC motor speed control. The esp32 connects to my raspberry pi server using MQTT and Node-Red to give me a UI for viewer the data from a PM2.5 sensor on board as well as control the functionality (manual on/off, auto mode on/off, and speed). You can also control those functions with Alexa. The project is almost done but I thought I’d share. 

These are just a few photos of prototypes and the final pcb. I also test functionality