This project allows you to build a pressure probe for liquid like water. Especially for grey-water / rain-water. The project is based on ESP32. You can drive it with solar-support and Li-Ion battery.

This will not work with Arduino IDE 1.6.5 (or below) or with non ESP32-S2/S3 devices (e.g. Arduino UNO, Arduino MEGA, etc.). To use this library you need to have Arduino core for the ESP32 installed.

Low-power Analog-to-Digital Converters (ADCs) are critical for energy-constrained applications such as portable and biomedical systems. However, the input buffers required to drive large ADC sampling ...