TimeServer

Turn off W-LAN

sudo vi /boot/config.txt

add section that says:

[pi5]
# Disable Wifi
dtoverlay=disable-wifi
# Disable Bluetooth
dtoverlay=disable-bt

Bring operating system up to date

sudo apt update && sudo apt upgrade

Configure fan in Raspberry Pi 5 housing

red: PIN4 (5V)

black: PIN6 (GND)

blue: GPIO14 (TXD) --> conflict with uart1!

set up fan via raspi-config

Activate UARTs and ops

In [pi5] section:

# Activate UART5 (GPIO #12 and #13)
dtoverlay=uart5

[all]
enable_uart=1
dtoverlay=pps-gpio,gpiopin=4
init_uart_baud=9600