Raspberry Pi

• Button / Switch
• KMS "Screenshot"

Button / Switch

1. Set the GPIO to input mode with pull-up.
2. Place 100nF capacitor between GPIO and GND.
3. (Optional) Place 10k resistor between GPIO and 3V3.

KMS "Screenshot"

ffmpeg -f kmsgrab -i - -vf "hwdownload,format=bgr0" screenshot.png