Rasberry Pi

Device

• Rasberry Pi 3B
• GPIO

Windows IOT

• Blog

Rasberry Pi OS

See /boot/firmware/config.txt.

Command line configuration program:

raspi-config

Upgrades

apt update && sudo apt upgrade -y

Web Server

apt install apache2

• Configuration: /etc/apache2
• Serve from: /var/www/html

Change 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:

/net /etc/auto.nfs --timeout=60

Edit /etc/auto.nfs:

media    -fstype=nfs,rw,soft,intr   server:/volume1/media

systemctl enable autofs
systemctl restart autofs

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:

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Temperature

Divide value by 1000 to get temp in C:

• /sys/class/thermal/thermal_zone0/temp

CPU Core throttling above 80 C.