This is the locker for the Blocklocker project. It's a locker with 8 doors and a Raspberry Pi.

1. Raspberry Pi
2. Board with 8 relays (relay module)
3. Cabinet with 8 doors (like IKEA KALLAX with doors)
4. 12V electric door lock (for each door)
5. 12V power supply
6. A few cables to connect everything

Connect the relay board to your Raspberry Pi and the door locks to the relays.

If you want to use other GPIO pins you can change this in the door.sh script.

Video: https://www.youtube.com/watch?v=oaf_zQcrg7g

Relay:

|---\  ---|
(1) (2) (3)
+---------+
| SRD-    |
| 05VCD-  |
| SL-C    |
+---------+

Connection:

• OFF: 1 + 2
• GPIO drive high (dh): 1 + 2
• GPIO drive low (dl): 2 + 3

Wiring:

• Connect the 12v power (positive) to relay pin 2.
• Connect the red cable (positive) from the lock to relay pin 3.
• Connect the black cable (negative) from the lock to ground.

Tested with Raspbian Stretch Lite (Download).

Install the following packages:

sudo apt-get install raspi-gpio git autossh lighttpd screen nano

Clone:

cd ~
git clone https://github.com/Cyclenerd/blocklocker.git

To copy and configure everything execute the copy.sh script:

cd blocklocker
bash locker/pi/copy.sh

Edit SSH config. Add IP address or DNS name from the shop back end:

nano -w ~/.ssh/config

There will be an SSH tunnel to the computer of the shop backend will be established later. Through this tunnel comes the command to open a door. Test:

ssh shop-back-end

Configure Lighttpd web server.

# Remove old index.html
sudo rm /var/www/html/index.lighttpd.html
# Copy CGI Script
sudo cp ~/blocklocker/locker/pi/index.sh /var/www/html/index.sh
# Allow user www-data to execute the "raspi-gpio set" command
sudo cp ~/blocklocker/locker/pi/099_www-data /etc/sudoers.d/
# Edit config
sudo nano -w /etc/lighttpd/lighttpd.conf

Extract from the modified file:

server.modules = (
        "mod_access",
        "mod_alias",
        "mod_cgi",
        "mod_compress",
        "mod_redirect",
)

index-file.names = ( "index.html", "index.sh" )
static-file.exclude-extensions = ( ".php", ".pl", ".fcgi", ".sh" )
cgi.assign = ( ".sh"  => "/bin/bash")

Restart:

sudo service lighttpd restart

All background processes (i.e. lock.sh and ssh.sh) run in one screen. After the configuration and reboot enter door to get it in the foreground.

Use key combination Ctrl + a, and subsequently pressing a key to execute one of the commands given below:

• n : switches to the next available console
• p : switches back to the previous console
• c : creates a new virtual Bash console
• d : detatches the current screen sessions and brings you back to the normal terminal

Configure crontab:

crontab -e

Add:

# run screen after reboot
@reboot sleep 60 && /usr/bin/screen -d -m

sudo reboot