This 2x UART HAT Board can be extended to support two RS232 connections using the RS232 module. When used with a Raspberry Pi 4, the RS232 x2 module achieves a speed of up to 115200 bps for each port, and when used with a Raspberry Pi 5, it can reach a higher speed of up to 921600 bps for each port.

Features:

• A real-time clock (RTC) function with a CR1220 battery socket
• 24C32 HAT EEPROM (i2c-0) provided for future software updates
• The Pi Model 4B board can still use Bluetooth & Wi-Fi
  
• Can choose use 2xUART signal or use DB9 RS232x2 output

Output:

• RS232 x2  2.54mm pitch 5x2 header to DB9 cable 
• Provide DB9 full 9pin signal.
• Each port's baud rate can get up to 115200bps (Pi4)
• Each port's baud rate can get up to 921600bps (Pi5)

Performance:

• This device use spi signal 1x sc16is752 chips for two ports for the best performance
• Power regulator converting 5V from the Pi 4 to provide an individual 3.3V power for the 2x UART Board

Demo Software:

• RS232 send & received test Python program

Technical specifications:

Hardware 

• Bus Type: spi signal SC16is752 Chipset 
• Interface: spi signal 
• Port Numbers: 2

System Requirements

• Linux 4.11.x to 5.4.x Versions

Demo Software Pack (*available upon purchase)

User Manual (*available upon purchase)