2-Channel RS232 Module for Raspberry Pi Pico

WaveshareSKU: WAV-19979
Sale price £7.50
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WaveshareDB9 to 3-pin Adapter Cable
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This is a 2-channel RS232 module for Raspberry Pi Pico which comes complete with a DB9 to 3-pin adapter cable!

The module uses a SP3232EEN Transceiver and uses the UART bus to easily convert UART to RS232 or vice versa. The baud rate is 300~912600bps. Onboard LEDs indicate the status of each pin (TXD0, RXD0, PWR, TXD1, RXD1).

No soldering is required as the module comes pre-assembled, with female headers ready to slot your Raspberry Pi Pico in to. Both terminal blocks and male pin headers are available for connecting the board.

Need an additional DB9 to 3-pin cable for use with the second channel? Grab one here!

Raspberry Pi Pico not included. You'll need a Pico with male headers soldered to it. You can grab a Pico here and Pico male headers here, or buy a Pico with pre-soldered headers.


  • Compatible with Raspberry Pi Pico
  • Uses the UART bus - converting UART to RS232 or vice versa
  • Includes DB9 to 3-pin adapter cable
  • Onboard indication LEDs
  • Terminal blocks alongside male jumper headers - options for connectivity
  • Pre-soldered
  • Comes with Online development resources and examples


  • Operating voltage: 3.3V-5V
  • RS232 Transceiver: SP3232EEN
  • Communication bus: UART
  • Baud rate: 300 ~ 912600bps

Package Contents

  • 1x Pico RS232 module
  • 1x DB9 to 3-pin adapter cable

Raspberry Pi Pico not included


What's Onboard?

Pico RS232 module onboard features

1) SP3232 RS232 transceiver
2) Raspberry Pi Pico header
3) RS232 bus interface
- 2-channel RS232 (DB9 male connector is also available through adapter cable)
4) TVS diode
5) ESD diode
6) UART status indicators
- RXD0/TXD0: Channel 0 RX/TX indicators
- RXD1/TXD1: Channel 1 RX/TX indicators

Hardware Connection

When connecting PICO, please pay attention to the connection direction. The direction can be judged by observing the USB screen printing end of the module and the USB interface end of the Pico (also can be judged by the pin labelling on the module and the pin label of the Pico).

You can also wire it manually according to the table below:

RS485 Pico Description
VCC VSYS Power input
GND GND Ground
TX_CH0 GP0 UART transmit pin
RX_CH0 GP1 UART receive pin
TX_CH1 GP4 UART transmit pin
RX_CH1 GP5 UART receive pin


Raspberry Pi Pico RS232 Module Pinout

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