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IOTHA MCP2221A Breakout Board
MCP2221A Breakout Board

Connect electronic modules to your PC using this USB 2.0 to I2C/UART Protocol Converter with GPIO.

This breadboard friendly breakout board allows you to use a PC to communicate with electronic devices using I2C/SMBUS, GPIO or serial UART.

It provides a quick, easy and versatile way to connect electronics for prototyping or to add devices such as buttons and small screens to your PC.

  • Managed .NET or unmanaged programming using a DLL library supplied by MicroChip
  • I2C Interface to communicate with ICs or widely available electronics modules
  • Four GPIOs that also have a number of other selectable functions
  • GPIOs can be configured as 3 ADCs and one DAC
  • One GPIO can be configured as an interrupt edge detector
  • GPIOs can be configured as UART/I2C activity LEDs
  • One GPIO can be configured to output a clock signal at up to 25MHz
  • Programmable PID, VID, descriptors and initial state
  • Can be USB bus powered or self powered
  • UART Can be accessed as a standard COM port on the host PC
  • UART Baud rate of 300 to 115200
  • Downloadable source code and examples
  • Enumerates as HID device for I2C and GPIO control
  • Enumerates as a CDC device for the USB to UART converter
  • Distinctive blue PCB
  • Android app to control basic functionality
  • Can be used with 3V or 5V circuits, selectable with a jumper
  • Optional I2C pullups selected by jumpers or solder pads
  • Only 35mm x 23mm
  • See here for more information on the MCP2221A

You can purchase either:

  • The PCB - Source the parts and solder yourself
  • The PCB and parts - Solder yourself
  • The assembled board - You just need to solder the pin headers yourself, pin headers and jumpers included

UI-001

Please note this board uses surface mount components.

Parts Required:


If you want to solder the parts yourself these are quite handy: