Rasberry Pi
Device
Rasberry Pi OS
See /boot/firmware/config.txt.
Command line configuration program:
raspi-config
GPIO
Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)
python:
apt install python3-gpiozero -y
go: periph.io
Upgrades
apt update && sudo apt upgrade -y
Web Server
apt install apache2
- Configuration: /etc/apache2
- Serve from: /var/www/html
Swap
free -m
swapoff -a dd if=/dev/zero of=/swapfile bs=1M count=1024 chmod 600 /swapfile mkswap /swapfile swapon /swapfile
Add to /etc/fstab:
/swapfile none swap sw 0 0
NFS Automounter
apt install autofs nfs-common -y
Edit /etc/auto.master and enable the host map:
/net -hosts --timeout=60
systemctl enable autofs systemctl restart autofs
NTP Client
apt install systemd-timesyncd -y
Edit /etc/systemd/timesyncd.conf and set NTP parameter
systemctl restart systemd-timesyncd timedatectl status
Composite Video
Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.
In /boot/firmware/config.txt:
enable_tvout=1 dtoverlay=vc4-kms-v3d,composite
Ensure hdmi_force_hotplug=1 is commented out or set to 0.
In /boot/firmware/cmdline.txt, either:
vc4.tv_norm=PAL vc4.tv_norm=NTSC
To control overscan, see settings:
margin_left margin_right
Temperature
Divide value by 1000 to get temp in C:
- /sys/class/thermal/thermal_zone0/temp
CPU Core throttling above 80 C.