explorer

Rocking Rasperry Pi

##Keep in mind

  • Use sudo nmap -sP -T4 10.0.30.1-254 to detect connected devices.
  • Then use sudo nmap -v -A -T4 10.0.30.1 get all opened port and services on this machine.
  • Start a vnc server on raspi. vncserver :1 -geometry 1200x700 -depth 24
  • apt update use goagent proxy. sudo apt-get -o Acquire::http::proxy="http://10.42.0.1:8087/" update
  • Statistic folder size: du -h --max-depth=1

##View the video over mplayer
Install mplayer: sudo apt-get install mplayer

Rasperry Pi: raspivid -t 999999 -o | omxplayer

##Stream video over a network (Official Doc)
Install related tool (both client & raspi): sudo apt-get install mplayer netcat

Some Linux : nc -l -p 5001 | mplayer -fps 31 -cache 1024 -
(Record on the other side: nc -l -p 5001 | ffmpeg -r 31 -i - out.avi)

Rasperry Pi: raspivid -t 999999 -o - | nc 10.42.0.1 5001

##Camera Error

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$ raspistill -o haha.jpg
mmal: mmal_vc_component_enable: failed to enable component: ENOSPC
mmal: camera component couldn't be enabled
mmal: main: Failed to create camera component
mmal: Failed to run camera app. Please check for firmware updates

Fixed by: Kernels >= 3.10: w1_gpio destroys i2c bus 0, raspicam doesn’t work anymore

##Connect to Wifi

  1. ifconfig: Enable your wireless device.
  2. iwlist: List the available wireless access points.
  3. iwconfig: Configure your wireless connection.
  4. dhclient: Get your IP address via dhcp.
  5. /etc/network/if-up.d/upstart
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iwlist wlan0 scan
sudo iwconfig wlan0 essid rk_mint key s:password123
sudo dhclient wlan0

##Load Camera to /dev/video0 HELP

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uv4l --driver raspicam --auto-video_nr

##Motion detect HELP

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LD_PRELOAD=/usr/lib/uv4l/uv4lext/armv6l/libuv4lext.so motion -c ./motion.conf