2-Channel Isolated RS232 Expansion HAT for Raspberry Pi

SKU: 17498
Part Number: 2-CH RS232 HAT
Brand: Waveshare


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2-Channel Isolated RS232 Expansion HAT for Raspberry Pi, SC16IS752+SP3232 Solution, with Multi Onboard Protection Circuits
2-channel isolated RS232 HAT for Raspberry Pi

2-Ch RS232, SPI communication

Bulit-in power supply isolation, magnetical isolation, and TVS diode, etc.

Features at a glance
  • Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
  • Adopts SC16IS752+SP3232 dual chip combination, converts SPI to RS232, data rate up to 921600bps
  • Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
  • Onboard LEDs for indicating the power and transceiver status
  • Breakout SPI control pins, for connecting with host control boards like Arduino
  • Comes with online development resources and manual (examples in C and Python)
UART expansion chip SC16IS752
RS232 transceiver SP3232
Communication interface SPI
Data rate 300 ~ 921600 bps
Operating voltage 3.3V / 5V
Dimensions 65.0 × 56.5mm
Mounting hole size 3.0mm

Connect to Raspberry Pi series boards

Standard Raspberry Pi 40PIN GPIO Header, Customized For Raspberry Pi Series Boards

Industrial Grade Isolated Protection
  • Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
  • Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
Supports 2-ch RS232

Using SC16IS752 UART expansion chip with SP3232 transceiver

What's On Board
  1. SC16IS752
    UART expansion chip
  2. SP3232
    RS232 transceiver
  3. π142M61
    digital isolator
  4. B0505LS
    power supply isolation module
  5. RT9193-33
    power chip
  6. Raspberry Pi GPIO header
    for connecting Raspberry Pi
  1. MCU control header
    for connecting host control boards like Arduino
  2. RS232 connector
    2 channels RS232 interface (RS232 9PIN male)
  3. Transient suppress diode array
  4. ESD protection two-way diode
  5. Serial port status indicators
    RXD1/TXD1: channel 1 transceiving indicator
    RXD2/TXD2: channel 2 transceiving indicator
  6. Power indicator
  7. Interrupt pin switch
    The interrupt pin IRQ is connected to P5 (BCM P24) by default, changeable via 0R resistor

Pin Definition

Product show

Outline dimensions
Resources & Services

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

Weight: 0.049 kg

Quick Overview

Note: this HAT doesn't come with any serial cable, you may also want to pick up the following cables for easy use:

  • Serial Cable Dual Female Crossover: for connecting RS232 devices with male connector, OR for self transceiving test of the HAT's 2 channels RS232
  • Serial Cable Male to Female Straight Through: for connecting RS232 devices with female connector
  1. 2-CH RS232 HAT x1
  2. 2x20PIN female pinheader x1
  3. RPi screws pack (2pcs) x1