If you're considering upgrading to a smart home, one barrier you might encounter is cost. Some products can cost you hundreds ...

Since we live in big polluted cities the air quality is on a very poor level. But, the problem is not only connected to the big cities - even smaller cities and villages may suffer from air pollution.

Based on cheap standard ESP8266 (and ESP32) boards programmed in Arduino IDE 1+ year operation on 1200mAh or 18650 battery For-ever operation with a small solar panel (80x55mm) ESP-Now receiver ...