This 4x UART HAT can be enhanced to support four RS232 connections using the RS232 x4 Module. The RS232 x4 module offers a maximum speed of 9600 bps per port when used with a Raspberry Pi 4, and an increased speed of 115200 bps per port when used with a Raspberry Pi 5.

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 4xUART signal or add RS232X4 module board with standard DB9 RS232 x4 output

Output:

• RS232 x4  2.0mm pitch 5x2 header to DB9 cable  
• Each port's baud rate can get up to 9600bps(Pi4)
• Each port's baud rate can get up to 115200bps(Pi5)
• 
  

Performance:

• This device uses i2c signal 2x sc16c752 chips for four ports for the best performance
• Power regulator converting 5V from the Pi 4 to provide an individual 3.3V power for the 4x UART Board

Demo Software:

• RS232 send & received test Python program

Technical specifications:

Hardware 

• Bus Type: i2c signal SC16c752 Chipset 
• Interface: i2c signal 
• Port Numbers: 4

System Requirements

• Linux 4.11.x to 5.4.x Versions

Demo Software Pack (*available upon purchase)

User Manual (*available upon purchase)