Serial Expansion HAT for Raspberry Pi, I2C Interface, 2-ch UART, 8 GPIOs

SKU: 15667
Part Number: Serial Expansion HAT
Brand: Waveshare




Serial Expansion HAT for Raspberry Pi, I2C Interface, Provides 2-ch UART and 8 GPIOs


There is only 1-ch UART port on the original Raspberry Pi, once it is used for terminal debugging, no more other serial device is allowed. What a poor situation. Now you have 2-ch extra UART, plus 8 programmable GPIOs, just bring this Serial Expansion HAT.


  • Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
  • Onboard SC16IS752, expands 2-ch UART and 8 programmable GPIO through I2C, no extra pin required
  • It is stackable up to 16 this modules by setting the address jumper, that means up to 32-ch UART
  • Onboard multi LEDs for indicating the UART working status
  • Reserved I2C control pins, allows to work with other control boards
  • Comes with development resources and manual (examples in C and python)


  • Operating voltage: 3.3V
  • Expansion chip: SC16IS752
  • Control interface: I2C
  • Dimension: 65mm x 30mm
  • Mounting hole size: 3.0mm


Serial Expansion HAT dimensions

Development Resources

Wiki :

Weight: 0.016 kg

Quick Overview

Note: Raspberry Pi in the photos is NOT included.

  1. Serial Expansion HAT x1
  2. RPi screws pack (2pcs) x1
  3. PH2.0 6PIN wire x2