CompletedESPower
License
：Public Domain
Description
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.
Design Drawing
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Intellectual Property Statement & Reproduction Instructions
This is an open-source hardware project. All intellectual property rights belong to the creator. The project is shared on the platform for learning, communication, and research only; any commercial use is prohibited. If your intellectual property rights are infringed on EasyEDA, please notify us by submitting relevant materials in accordance with the Rules for Complaints and Appeals of IPR Infringement.
Users must independently verify the circuit design and suitability when replicating this project. All risks and consequences are borne by the user, and the platform assumes no liability.
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