README.md
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Project Summary: Custom IoT PCB with ESP32-C3-02 and TP4056 Li-ion Charger

This project involves the design and development of a custom PCB for an IoT application powered by the ESP32-C3-02 SoC. The board includes integrated power management features using the TP4056 Li-ion battery charger IC, enabling efficient and safe charging of a single-cell Li-ion battery.

Key Features


Microcontroller: ESP32-C3-02 SoC for Wi-Fi and BLE connectivity.
Power Management: TP4056 IC for single-cell Li-ion battery charging with thermal regulation.
Battery Protection: Integrated under-voltage lockout and trickle charging.
Sensors and Modules:


BME280 for temperature, humidity, and pressure sensing.
Ambient light and sound sensors.
Mini SD card reader for data storage.
Flash memory for additional storage.

Display: I2C OLED for real-time data visualization.
Power Inputs:


USB-C connector for charging and data transfer.
LiPo battery connector with onboard charging circuitry.

Indicators: LED indicators for charge status (charging and full).


Design Highlights


Power Supply Integration:


USB-C provides power for both charging and system operation.
TP4056 handles battery charging and protection.
Power supplied to the ESP32-C3-02 is regulated for stability.

Modular Architecture:


Supports various sensors and peripherals for IoT applications.
Expandable via additional I2C devices.

Safe and Efficient Charging:


Programmable charging current using an external resistor.
Automatic charge termination and battery protection.

Compact and Reliable Layout:


Optimized PCB traces for minimal power loss.
Thermal management for the TP4056 and other components.



Applications


IoT edge devices for environmental monitoring.
Battery-powered data logging systems.
Prototyping platform for ESP32-based projects.


Repository Contents


Schematic and PCB Layout: KiCad files for the board design.
Firmware: Source code for the ESP32-C3-02 to interface with sensors and peripherals.
Documentation:


Datasheets for the TP4056 and other components.
Assembly instructions.
Testing procedures.

License: MIT License.


This repository is a complete resource for designing and building a robust IoT solution with integrated power management and ESP32 connectivity.