Enable Serial Interface via UART for the Raspberry PI

raspberry-enable-serial-interface-uart.sh

#!/bin/bash


# # # # # # # # # # # # # # # # # # #
# Enable Serial Interface via UART  #
# # # # # # # # # # # # # # # # # # #
# Dominik Kohler @ 19.11.2018

# Tested on Raspbian Stretch (9.4)

# Disabling Linux's use of console UART (https://www.raspberrypi.org/documentation/configuration/uart.md)
sed -i -e 's/console=serial0,115200 //g' /boot/cmdline.txt

# Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
printf "\ndtoverlay=pi3-disable-bt\n" >> /boot/config.txt

# Disable Systemd service that initialises the modem which uses the UART usually.
systemctl disable hciuart

echo "Reboot is required for changes to take effect"

# Configure the UART interface to 9600/8/1. Output all received data in terminal (end with CTRL+C)
  # stty -F /dev/ttyAMA0 9600 min 1 time 0 -brkint -icrnl -imaxbel -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke
  # cat /dev/ttyAMA0