ESPower

This project uses the ESP32-C3 microcontroller to build a portable system for measuring current in electronics projects. It is designed to measure currents in the 0 to 3.2 A range (it is recommended not to exceed 2 A), with a sensitivity of about 100 µA, using the INA219 current and voltage sensor. The sensitivity can be adjusted by changing the shunt resistor to suit different measurement needs.

The system runs independently on a single LiPo battery, making it fully portable. It uses the ESP32-C3’s Bluetooth Low Energy (BLE) features to send data wirelessly, making it ideal for real-time monitoring and logging of current in small or mobile systems.

The C source code is included, along with a mobile app developed by the author using MIT App Inventor. The app allows viewing the current measurements in real time and also saving the data in .csv format for future analysis.

Initial tests were performed on a preliminary hardware version. Based on these tests, the final PCB design was corrected and updated using EasyEDA Pro.