Raspberry Pi RS485 RS232 HAT
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-06.jpg)
Features At A Glance
- Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
- Using the combination scheme of SC16IS752, SP3485 and SP3232, one RS485 and one RS232 can be extended through the SPI interface
- On-board resettable fuse and protection diode can ensure the stable output of RS485 current and voltage, prevent overcurrent and overvoltage, and improve shock resistance
- On-board TVS (transient voltage suppression tube), which can effectively suppress the surge voltage and transient peak voltage in the circuit, and protect against lightning and static electricity.
- Reserve SPI control interface, which is convenient for main control boards such as Arduino
- Comes with development resources and manual (examples for Raspberry Pi/Arduino)
Product parameters
- Serial port expansion chip: SC16IS752
- Communication interface: SPI
- RS485 transceiver: SP3485
- RS232 transceiver: SP3232
- Serial communication rate: up to 921600bps
- Working voltage: 5V
- Diameter of positioning hole: 3.0mm
- Product size: 65mm × 56.5mm
Based on Raspberry Pi 40pin GPIO interface
Suitable for Raspberry Pi series motherboards
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-07.jpg)
Support RS485 and RS232 interface
RS232 function: full duplex communication, the transceiver is SP3232
RS485 function: semi/automatic communication, transceiver is SP3485
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-08.jpg)
Anti-overcurrent and anti-overvoltage
On-board TVS (transient voltage suppression tube) and resettable fuse can effectively suppress the surge voltage and transient peak voltage in the circuit, and improve the shock resistance
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-09.jpg)
Interface definition
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-10.jpg)
What's On Board
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-11.jpg)
- Raspberry Pi GPIO interface
Easy access to the Raspberry Pi board
- MCU control interface
Easy access to main control boards such as Arduino
- RS485 interface
- RS232 interface (DB9 male)
- SC16IS752 Extended serial port chip
- SP3485 RS485 Transceiver
- SP3232 RS232 Transceiver
- π142 digital isolator chip
- PC817 optocoupler isolation
- B0505LS Power Isolation Module
- RT9193-33 power chip
- TVS Diode Array
- Resettable fuse
- Status Indicator
PWR: Power indicator
RXD/TXD: serial port transceiver indicator - RS485 120Ω termination resistance switch
Can be connected to CR2032 coin cell battery - Interrupt pin switching
Default D24 pin, can be changed to D16/D12/D25 pin by soldering 0 ohm resistor
- RS485 working mode switch
Semi-automatic: A=1, B=0
Fully automatic: A=0, B=1
![](https://cdn.static.spotpear.com/uploads/picture/product/raspberry-pi/raspberry-pi-hats/rs485-rs232-hat/rs485-rs232-hat-12.jpg)