LoRa Module with Atmega328P-Based PCB Design

This PCB design was created to enable direct wireless messaging via LoRa RA-02 from a PC. The Atmega328P-AU microcontroller interfaces with the CH340C USB-UART chip, allowing seamless serial communication. A Female Type-A USB connector lets the board be plugged directly into a PC without additional adapters. The 3.3V AMS1117 regulator and decoupling capacitors ensure stable operation. For long-distance communication tests, it supports cable extensions. Designed to be compact and portable.

This project features a PCB design based on the Atmega328P-AU microcontroller, enabling wireless communication with the LoRa RA-02 module. A CH340C USB-UART chip provides computer connectivity, while an AMS1117-3.3V regulator supplies the necessary 3.3V power. The circuit includes a 16MHz crystal, decoupling capacitors, a WS2812 LED indicator, and a reset circuit. The design prioritizes a compact and functional layout, avoiding unnecessary components.