CH224 PD-sink Controller for Arduino

A simple Arduino library for controlling the CH224 PD controller via I2C.

Features

• I2C read/write for CH224 registers
• PDO (Power Data Object) parsing
• Voltage switching (5V, 9V, 12V, 15V, 20V, 28V, PPS, AVS)
• Current/voltage monitoring
• Supports EPR, QC 3.0/2.0, BC modes

Key Registers

• 0x09: Status (PD/QC/BC/EPR/AVS flags)
• 0x0A: Voltage control (select output voltage)
• 0x50: Current (unit: 50mA)
• 0x51/0x52: AVS voltage config (unit: 25mV)
• 0x53: PPS voltage config (unit: 100mV)
• 0x60~0x8F: PD Source Capabilities

Installation

1. Clone:
   git clone https://github.com/spencer1979/CH224_arduino.git
2. Copy CH224_Arduino_library to your Arduino libraries folder.

Hardware Connection

• SDA: Arduino SDA (e.g. A4)
• SCL: Arduino SCL (e.g. A5)
• VCC: 3.3V or 5V
• GND: GND

Usage Example

CH224_basic.ino demonstrates:

• Automatic USB plug/unplug detection and CH224 power control
• Two buttons to switch between different fixed voltage PDOs
• Customizable I2C pins and real-time status via serial port

For details, see examples/CH224_Example/CH224_basic.ino and modify pin definitions as needed.

Debugging

Uncomment #define CH224_DEBUG 1 in CH224.h to enable debug messages.

License

MIT License. See LICENSE.