How to install or upgrade UV4L on Raspbian Wheezy & Raspbian Jessie for Raspberry Pi
The following instructions refers to installing UV4L on the official Raspbian Linux distributions for any flavour of Raspberry Pi (1, 2, 3, Compute Module, etc…). As these installation instructions are updated and improved very frequently, it is suggested to read them from scratch in case of problems and especially whenever a new UV4L module is announced.
Raspberry Pi motion detection IR Camera with IR lights
Raspberry Pi camera module with PIR motion detector with external IR Lights
HW version 2.0
SW version 1.7.1
Camera shoot video as long movement is detected and take image every 10 minutes.
Application takes care that old recordings are removed and there is always enough disk space available. The amount of free disk space can be set on application settings.
This work is still in progress. Next I am planning to add possibility to store recordings on external server and change the schematic so that single 12V power is used instead of 5V and 12V which are used in this configuration.
The idea in this configuration is that when motion is detected python application gets information of it and it will turn the illuminator on and start recording. Recording continue until movement is no longer detected.
The whole system is packed into standard casing since I don’t have 3D printer to create custom case.
I used TIP 120 based configurations as a base of my build. Since TIP 120 was not available locally I used DB681 darlington transistor instead. The 1000 µF capacitor was added to remove flicker. Without capacitor it light was flickering when standard 12v power source was used.
The switch was build on separate board and connected to Raspberry Pi and insulated from Pi by using bike tire inner tube. On my original build switch was located on separate case.
In this configuration PIR is connected on 5v, GND and GPIO4. Switch uses GPIO 24.
Raspberry Pi plays automatically images from inserted USB flash drive and is shutdown by pressing the button inserted into the device.
feh is used to display the images from USB and python script to shut down the device.
I collected tips from several pages and try to list as many of them at the end of this article.
Prepare Raspberry Pi
Install standard rasbian package from www.raspberrypi.org by following the image installation guide. NOOBS will do just fine too.
Setup Raspberry Pi according to your preferences. Only thing to ensure is that Raspberry start on GUI. Instructions can be found also from www.raspberrypi.org. You need keyboard on first startup.
You can use either console directly from Raspberry Pi or as I prefer SSH to connect the device. My preferred SSH client is MobaXterm.
Install feh and setup startup files
Update rasbian and install feh. Network connection is needed.
sudo apt-get updatesudo apt-get upgradesudo apt-get install feh
Create mount point
Mount point is needed to ensure all USB flash drives are treated same way. If USB is not mounted it will show under media as the way flash drive is named. For example KINGSTON would be ’/media/KINGSTON’ and could not be detected by feh if different flash drive was used previously
sudo mkdir /media/usb
This phase can be skipped if button is not used to shutdown Raspberry Pi. I do recommend using this since shutting down the Raspberry Pi simply by unplucking the device can cause the SD or USB flash drive corruption.
Connecting the GPIO 17 to the ground will cause shutdown to be performed. You may use other pins also but code need to be changed accordingly.
nano shutdown py
And paste the following code
import RPi.GPIO as GPIO
# GPIO 17 = pin 11
# GND = pin 9
if(GPIO.input(17) == False):
os.system("sudo shutdown -h now")
Ctrl-x and Yes and Enter to close editor and save changes
Update rc-local so that USB is automatically mounted and shutdown.py is loaded at startup
sudo nano /etc/rc.local
Into the rc.local before ’exit 0’ add the following lines to mount USB flash drive and to start shutdown.py on background process
sudo mount /dev/sda1 /media/usb
sudo python /home/pi/shutdown.py &
Update LXDE autostart
Update LXDE so that feh is started automatically on startup
This doesn’t seem to work anymore with rasbian jessie
sudo nano /etc/xdg/lxsession/LXDE-pi/autostart
But this one does
sudo nano ~/.config/lxsession/LXDE-pi/autostart
Instert following lines at the end of autostart
@xset s off
@xset s noblank
@feh --quiet --fullscreen --borderless --hide-pointer --slideshow-delay 30 /media/usb/
Mount USB by running
sudo mount /dev/sda1 /media/usb
And see if you can see the content of USB drive
Test feh by running following on command line. You need to have pictures on USB 🙂
# Turn TV on
0 8 * * 1-5 echo "on 0" | cec-client -s
# Turn TV off
0 16 * * 1-5 echo "standby 0" | cec-client -s
This worked fine with TV
The Raspberry Pi A+ works fine with feh and USB flash drive. Simple configuration without anything fancy. Just power on the Pi and images start to roll directly from USB and it can be shutdown properly by connecting the 9 and 11 pins (button).
A lot could be done. I tested already some digital signage solutions but for my use case this one was the most convenient especially since my goal was to get my Raspberry Pi A+ in good use. I did all the tasks mentioned in this article in my Raspberry Pi 2 since it is so much faster and have ethernet port build in and used the A+ after everything was ready. 🙂
Possibility to fetch images from some external source can be reached with feh and insertion of USB while feh is running. Just keep reading the references and other sources.
Starting the RPi by connecting the run pins could be added so that power doesn’t need to be removed and reconnected. One button to shutdown RPi and another to start it up again. RPi uses very little power when it is on idle.
Perhaps archinux could be used instead of rasbian?
Article tells how Pi have been used to to gather and store temperatures and how the data can be displayed quite neatly.