DISCONTINUED: This product has been discontinued, the page is available for reference and documentation.


The RS232 port is connected to the UART port on the Raspberry Pi using a MAX3232 interface. The MAX3232 IC converts the 3.3V UART port to RS232 voltages allowing communication with RS232 compatible devices over a DB9 serial cable or with the use of a null-modem cable the board allows terminal access with linux on the Raspberry Pi using a terminal application. The RS232 port can be accessed through the DB9 port or the solder points on the PCB.

An array of 2.54mm pitch holes with 3.3V and 5V connections are also provided on the PCB allowing you to build additional circuits on the board.

Please note that you can only use one Serial Pi board on a Raspberry Pi.


  • RS232 Master Port.
  • Control the Raspberry Pi A+, Raspberry Pi B+ and Raspberry Pi 2 Model B over RS232 or connect to external serial accessories.
  • Stackable with other Raspberry Pi A+, Raspberry Pi B+ and Raspberry Pi 2 Model B and Raspberry Pi accessory boards.
  • Mounting holes for use with the AB Electronics UK mounting kits (sold separately)

The Serial Pi Plus  is a communication board supporting the RS232 serial protocol.



Sample Code & Tutorials

Configuring the RS232 communication on the Raspberry Pi

Using the Serial Port


SKU AB-SerialPiPlus
Brand AB Electronics UK

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