power supply (?) issues - crashing when pulling >8W (i was running off a power bank)
you might want to consider getting the official one (5A/27W)
Temporarily limiting the CPU clock speed
echo 1500000 | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
or to persist a setting on reboot /boot/config.txt
arm_freq=1500
It's a little bit awkward to get right, but you need to go into network settings and find "Manage Virtual Interfaces"
Make sure that your ethernet adapter is added as a device to the "Thunderbolt Bridge" interface.
You can also make sure to disable "General > Sharing > Internet Sharing" if you don't need it.
side note: arp -a has been quite useful for checking up on the connection and finding the IP that gets allocated, but you probably leverage bonjour/libnss-mdns and find it with just ssh [email protected]
If you leave the pi inactive and connected via bridge, you'll notice that the connection will drop. You either need to stay connected or just reconnect the adapter when this happens.
buying a powersupply with the official spec fixed the power issues, but now i need to wait 3 days because i accidentally bought a display cable instead of a camera cable 💀
vcgencmd get_config usb_max_current_enable check if you can draw max current from power supply
actual docs https://www.raspberrypi.com/documentation/computers/raspberry-pi.html
enable a hotspot on wlan0
sudo nmcli dev wifi hotspot ifname wlan0 ssid <name> password <password>
sudo nmcli radio wifi off
start hotspot on reboot
sudo nmcli con modify Hotspot connection.autoconnect true
you would probably want to get rid of any existing wifi connection
nmcli con delete id <ssid>
if you want to turn it off (i.e. to avoid interfering w/ wifi at home, but be able to connect when taking the pi outside) you can disconnect it using sudo nmcli dev disconnect wlan0 every time you boot up at home.
This method allows it to still autostart the hotspot correctly on the next reboot... basically I want to talk to the pi w/o internet or carrying an ethernet adapter everywhere I go.
note: nmcli radio wifi off hotspot won't start on reboot, but if you just disconnect it will still start
camera stuff
for compiling ffmpeg from source
./configure --enable-libx264 --enable-gpl --enable-shared
compiling rpicam-apps
meson setup build -Denable_libav=true -Denable_drm=true -Denable_egl=false -Denable_qt=false -Denable_opencv=false -Denable_tflite=false
streaming video (rpi server)
rpicam-vid -t 0 --codec libav -o "tcp://0.0.0.0:1234?listen=1" --camera 1
client
ffplay tcp://<raspberrypi>.local:1234