README.md

I found how to fix UARTs of raspberry by using another UARTs of raspberry pi 4 because rpi4 has 6 UARTs port .

Example :

• UART0 , UART1 , UART2 , UART3 , UART4 , UART5

My Devices :

• RPI : Raspberry Pi 4 Model B (MASTER)
• OS : Ubuntu Mate 20.04
• SLAVE : Teensy 4.1 (Communicate with raspberry pi 4)

References

• Raspberry Pi Pinout
• Raspberry Pi UARTs Configuration

You can enable UARTs on RPi4 by editing files /boot/config.txt and add

dtoverlay=uartx

x is the number of your UARTs

or

Use my scripts : sudo python3 attach_serial.py (not forget sudoo ~!!!)

Requirement :

• pip install pyserial

1.Before enabling UARTS you can see only /dev/ttyAMA0

2.Select your UARTS (restart required)

3.After enabling UARTS you can see another ttyAMA

4.Testing Sending & Receiving Serial Communication by ttyAMA

Question (What is path of UARTs):

• /dev/ttyACM0 - /dev/ttyACM5

DON"T USE IN UBUNTU SERVER THAT MAKE YOUR RASPBERRY PI RAINBOW DASH