USB-B to UART Converter (H1AR1x)


USB-B-to-UART Converter

Stage: Production

6 in stock (can be backordered)


H1AR1x is a USB-B-to-UART bridge module based on FTDI FT230XQ-R and STM32F0 MCU. It provides both power and communication through a virtual COM port.

  • Use this module to add USB 2.0 type-B serial ports to your Hexabitz arrays or other projects.
  • You can power your array from the USB port as well. USB power can be easily disabled via a jumper.
  • You can easily connect the USB port to any of module array (UART) ports, or even do advance multiplexing using DMAs and software tricks.



  • FTDI FT230XQ-R USB 2.0 Full Speed to serial UART converter:
    • 300 baud to 3 Mbaud data transfer rate.
  • TI LM3940IMP-3.3/NOPB 3.3V / 1A low dropout regulator regulates the USB Vbus down to +3.3V.
    • 2-pin 2.54 mm jumper to enable/disable 3.3V output voltage from Vbus.
  • USB-B through hole, right angle receptacle USB connector.


  • STM32F091CBU6 32-bit ARM Cortex-M0 MCU.
  • 8MHz external oscillator.
  • Five array ports and six power ports (+3.3V and GND).
  • Access to 5xUART, 2xI2C, SWD, BOOT0, RESET.

Physical Properties

  • Shape: Hexagon
  • Size: 30 mm short diagonal, 17.32 mm side
  • Area: 7.8 cm^2
  • Weight: 1.3 g
  • Soldermask Color: Dark green
  • Surface Finish: ENIG (gold) or HASL-LF (tin)


Please visit this product projects on network.



Quickstart Guide

Download a PDF version here.



Frequently Asked Questions

Have more questions? Please check our main FAQ page and feel free to contact us for any unanswered questions.


Download a PDF version here.


  • Schematics (PDF)
  • Hardware Design Files (Circuit Maker, EAGLE)
  • Source Code (GitHub). Download a pre-compiled firmware HEX file here.
  • Documentation / Factsheet (PDF)
  • Projects & Examples: Please check our account on for demo projects and examples.