One of my first Instructables was a sourveillance kit Raspberry Pi based
I'm now back with an update that changes the form not the substance.
It's a WIFI door cam with the following features:
- TFT shield to show who's at the door
- automat LED lighting
- camera stream on mobile and desktop browsers (Firefox, Safari, Chrome)
- email alert with snapshot attached
- audio motion alert on a remote Raspberry Pi client
For this project, it was very important to reuse a battery spotlight found inside my unused stuff box. It is a OSRAM DOT-IT battery spotlight (with an inappropriate colour!).
This project also include my first Instructables https://www.instructables.com/id/LEGOLED/ , but it can be easly replaced by a portable speaker.
Step 1: Parts Needed
Raspberry Pi B+
Raspberry Pi with speaker (remote) or portable speaker (built-in)
Micro SD 8GB
5V 2A power supply
Raspberry Pi Camera+flat cable
general purpose NPN transistor TIP120 (or similar)
Single Row Male 90 Degree Right Angle 3 Pin Header
5 x small screws
2 x 2cm screws
thin carton pressed sheet
Step 2: How It Works
At system starts, Web camera interface run in background and let you able to watch camera stream on a remote device, mobile phone or remote desktop PC.
When motion is detected, TFT and camera led lights turns on so you can watch on Raspberry Pi display who's at the door. At the same time starts a command to a remote Raspberry Pi (or to portable speaker) to activate an acustic alert. A snapshot is stored inside SD card and starts video recording.
When motion detect ends, the snapshot is sent by email to your favourite address, video recording ends and is stored inside SD card, TFT and outside led lights turns off.
My configuration provides that the acoustic alert is played by the project LEGOLED that is on at all times inside my house main room, but New Door Cam can be implemented with a speaker module or a common portable speaker.
Step 3: DOT IT Hack
Digging through some unused things i've found what really is needed for this project.
Removing some plastics and part of the electronic circuit i've otained something that was perfectly made for my purpose. As you can see in the last photos, two holes are devotes to leds and one to camera lens.
The original spotlight circuit consists in three white leds and a pushbutton. One of three led and pushbutton have been removed.
Removing pushbutton implies that led ground will be permanently disconnected, so i've soldered a jumper as showed in photo.
A small circuit added consist of a general purpose NPN transistor and a resistor to drives the leds.
I've added also three layers of thin pressed cardboard to increase basement thickness, then i've created a slot for camera and led cables.
The small led drive circuit has three pins: +5V, signal, GND. Connect signal pin to PIN 40, GND to PIN 39 and +5V to PIN 2.
DOT IT is finally screwed outside the door with two 2cm, at least, screws and i've also placed two small screws on the outer edges to ensure DOT-IT frame.
Green cable to to PIN 40, GND to PIN 39, POSITIVE to PIN 2
Step 4: System Setup
Raspbian GNU/Linux 7 (wheezy)
WIFI dongle and TFT (*) module already installed and configured.
Set static IP on Raspberry, a lot of tutorial shows how to do it.
Launch sudo raspi-config and:
- enable deskotp as user pi
- expand filesystem
- enable pi camera
sudo apt-get update
sudo apt-get dist-upgrade sudo apt-get install chromium-browser
Once you launch chromium, a preference (inside /home/pi/config/chromium/Default) file is created. Inside the file there needs to set correct zoom to fit video stream on TFT display. It needs to be added after "per_host_zoom_levels"
My configuration is: "localhost": -0.55, also showed into Preferences file attached
If you have a different TFT size, feel free do modify it.
Remember that, to modify Chromium Preferences file you must first close the browser.
sudo nano /etc/xdg/lxsession/LXDE-pi/autostart
and modify file as follow:
#@lxpanel --profile LXDE #@pcmanfm --desktop --profile LXDE #@xscreensaver -no-splash @xset s off @xset -dpms @xset s noblank @chromium --noerrdialogs --kiosk --enable-kiosk-mode --enabled --touch-events --touch-events-ui --disable-ipv6 --allow-file-access-from-files --disable-java --disable-restore-session-state --disable-sync --disable-translate --disk-cache-size=1 --media-cache-size=1 http://localhost:80/index.php
(*) based on a 3.5 inch TFT 480x320
Step 5: Web Camera Interface
It's time to install the main program. Thanks to silvanmelchior user for this very good web interface.
git clone <a href="https://github.com/silvanmelchior/RPi_Cam_Web_Interface.git"> https://github.com/silvanmelchior/RPi_Cam_Web_Int...>
cd RPi_Cam_Web_Interface chmod u+x RPi_Cam_Web_Interface_Installer.sh ./RPi_Cam_Web_Interface_Installer.sh install
then configure webserver password and port.
Inside the file /etc/raspimjpeg change value as follow:
- motion_detection true
- motion_external false #(i'd rather internal motion detection)
Internal motion detection adopt macros to launch activities. I've created two macros, one at video recording starts, ona at recording ends. These two macros write 1 or 0 inside a txt file, depend from video recording activity. Then this file is periodically read by a python script as explained in the step 7.
sudo nano /var/www/macros/start_vid.sh
echo "1" >/var/www/testmacro.txt
exit, save and give permissions as follow
sudo chmod 777 /var/www/macros/start_vid.sh sudo chown www-data:www-data /var/www/macros/start_vid.sh
This is second macro:
sudo nano /var/www/macros/end_vid.sh
echo "0" >/var/ww/testmacro.txt
var=$(ls /var/www/media/*.jpg | sort -V | tail -n 1) echo "$var" >/var/www/testmacronomefile.txt
exit, save and give permissions as follow
sudo chmod 777 /var/www/macros/end_vid.sh sudo chown www-data:www-data /var/www/macros/end_vid.sh
Photo shows my motion and scheduling configurations.
I've also make some changing inside /var/www/index.php file to fit web page on TFT screen.
Rename file "index" to "index.php" and paste into /var/www directory.
Step 6: Acustic Alert
As said, when motion is detected an alert sound is played on a remote Raspberry Pi device. This can easly optained using SSH client, SSHPASS on New Door Cam and MPG123 player on the remote Raspberry Pi device. If you want connect a speaker directly to Raspberry Pi headphone plug, you need only to install MPG123 player on New Door Cam device.
sudo apt-get install sshpass
assuming that on the remote device is already installed MPG123 and there's example.mp3 file into pi directory, try it launching:
sshpass -p REMOTERPIPASSWORD ssh pi@REMOTEIPADDRESS -p22 mpg123 -m /home/pi/example.mp3
if it works, go ahead.
For a New Door Cam with built-in speaker install only:
sudo apt-get install mpg123
other changes will be showed in the next steps
Step 7: What Macros Does
Files attached to be copied into /home/pi directory
The file newDC.py handles :
- turning on/off TFT screen
- send email with snapshot at motion ending
- send ssh command to activate acustic alert to the remote Raspberry Pi (*)
add your parameters to
- fromaddr = email address sender
- toaddr = email address receiver
- server.login(fromaddr, "YOURPASSWORD") = email password
- os.system("sshpass -p 'REMOTERPI_PASSWORD' ssh pi@IP_REMOTERPI -p22 mpg123 -m /home/pi/example.mp3") = remote Raspberry Pi IP and password
The file led.py handles leds turning on/off
Give permissions to these files:
sudo chmod 777 /home/pi/led.py sudo chmod 777 /home/pi/newDC.py
@reboot sudo python /home/pi/led.py @reboot python /home/pi/newDC.py
(*) for a built in speaker change line inside file newDC.py as follow:
os.system("sshpass -p 'REMOTERPI_PASSWORD' ssh pi@IP_REMOTERPI -p22 mpg123 -m /home/pi/example.mp3")
os.system("mpg123 -m /home/pi/example.mp3")
P.S. at seveth line of the file newDC.py has been considered that TFT display value is ":0"
Check your display value using command line
Step 8: WIFI Troubleshooting
Sometimes could appens that Raspberry Pi loses WIFI connection.
At specific interval wifi_rebooter.sh file check if there's connection between Raspberry Pi and Google DNS server. If not, it stop and start wireless interface to try reconnecting.
Copy the file into /home/pi directory, rename to wifi_rebooter.sh and give permissions:
sudo chmod 0644 /home/pi/wifi_rebooter.sh
after that, set checking time in crontab
*/10 * * * * sudo bash /home/pi/wifi_rebooter.sh >/dev/null
this command check connection every 10 minutes
Step 9: Modem Configuration
To watch video stream and control webcam from outside your network, you have to open port on your modem.
Normally you have to open port 80 for TCP protocol. After that you'll be able to watch stream writing following URL
If would be good having a static IP or a DDNS address.
Step 10: Final Considerations
My first Door Cam instructables was a success for me. After more than a year, it still interest Instructables community.
I hope this instructables will do the same.
The next step is to change Raspberry Pi camera (the one used to test is a NOIR)
Shortly i'll develope new version that will include:
- external pushbutton to emulate various doorbell sounds
- sounds played on a remote speaker using Bluetooth technology