Raspberry Pi and USB camera

Install the usb camera software

sudo apt install fswebcam

Plug in the USB device and check it is there

lsusb

look for something ike e.g Bus 001 Device 004: ID 32e4:9230 HD USB Camera HD USB Camera

root@raspberrypi:/home/pi# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

NOW PLUG IN

root@raspberrypi:/home/pi# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 32e4:9230 HD USB Camera HD USB Camera
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Find the video

ls -l /dev/video*
crw-rw---- 1 root video 81, 13 May 15 20:33 /dev/video0
crw-rw---- 1 root video 81, 15 May 15 20:52 /dev/video1
crw-rw---- 1 root video 81,  4 May 15 20:33 /dev/video10
crw-rw---- 1 root video 81,  5 May 15 20:33 /dev/video11

Which /dev/videoX should I use?

v4l2-ctl --list-devices

 Take some photos

fswebcam -d/dev/video1 --no-banner -r 320x240 -S 10 ./image2.jpg

more