This repository contains python programs that receive Bluetooth commands to open and close a garage door. It does this by setting up a RFCOMM server that waits for a byte stream from a client. The byte stream is a pseudo random stream of bytes. The server analyzes these bytes and determines if they are from a valid client. If they are, the server, running on a Raspberry PI 0 W single board computer, pulses a GPIO pin to close and reopen a relay. The relay is connected to the same contacts used by a push button that is mounted near the house entry.

Parts:

• Raspberry PI 0 W
• Velleman IO VMA406 5v relay
• 16 G SD card - can be smaller
• 110 to USB power suppy and adapter/cables to attach to the PI
• Zebra Zero Black Ice GPIO case made by C4LABS

Assembly - Software:

1. Install Stretch Lite from www.raspberrypi.org/downloads/raspbian I do headless installs of my PI 0's which, on the publication date means that I copy the raspbian image to the SD card plugged into my Mac, mount the card and touch the ssh file on the boot partition and and create a wpa_supplicant.conf file.
2. Boot off the installed image.
3. Change the password.
4. Change the node name to gdo.
5. sudo apt-get update
6. sudo apt-get install python-bluetooth
7. sudo apt-get install python3-pip
8. sudo pip3 install PyBluez
9. sudo pip3 install RPi.GPIO
10. edit the /etc/systemd/system/bluetooth.target.wants/bluetooth.service file to add --noplugin=sap -C to the ExecStart line
11. restart the service (sudo systemclt restart bluetooth.service) - it may give you some other instructions and you may need to enable it first
12. sudo spdtool add SP
13. sudo apt-get install git
14. git clone https://github.com/mbroihier/garage-door-opener.git
15. sudo cp -p GDO.service /lib/systemd/system/
16. sudo systemctl enable GDO
17. Pair your bluetooth client with this server
    • sudo bluetoothctl (you'll need to start the agent, allow discovery, then initiate a pairing operation from the client, disable the agent, and disable discovery)

Once paired, reboot:

sudo shutdown -r now

This will start the server. A client like the one in https://github.com/mbroihier/GDO will be able to send messages to the server which will cause it to pulse pin 11 of the 40 pin connector.