2 layers49.5 × 59.7 mm

Pm sensor UART
ondras12345/pm-sensor
SPS30-based PM2.5 particulate matter sensor with RS485
38 partsMIT
KiCad boards from 1 GitHub repository tagged “pm25”, the most starred first; open any of them in PCBKit.

ondras12345/pm-sensor
SPS30-based PM2.5 particulate matter sensor with RS485