As I've experimented and played with a lot of different sensors, I've discovered that these basic devices can be built for ...

Luckily his chosen platform, the ESP32, has some phenomenal power saving features. ... The custom board can read from six soil sensors. In his extremely detailed blog post, ...

This breadboard compatible package combines an ESP32-S2 module with a top-mounted PIR sensor, making it a turn key solution for all sorts of motion sensing projects.