Raspberry Pi Garage Door REST server

Used to control an automatic garage door opener, features include:

• Activate door open/close/stop
• Email notification when door remains open for a set period
• Sensing door state changes

See the Blog Post

See the ToDo list

##Architecture & Design

• Python3 (unit test framework not compatible with python2)
• Bottle to manage REST service
• CherryPy for HTTP server
• RPIO Raspberry Pi GPIO to control/sense door state
• Pyhon finite state machine fysom to manage door states and events
• sqlite database to store state
• Smart browser interface Garage Control
• Google OAuth reverse proxy (written in GO) for authentication and authorisation google_auth_proxy

user ----> router [port forward] ----> oauth proxy ----> py_garage_server ----> garage.db
                                                                        \-----> GPIO -----> Relay/Sensors

If not requiring external access or for testing can go directly from user to py_garage_server by disabling auth in config (see below) without the need for google_auth_proxy

##Electronics

To build the electronics - see README and diagrams in the electronics folder

##Browser app

Download garagecontrol-client.zip

Put file in application folder and unzip to www:

unzip garagecontrol-client.zip -d www

Should create following file structure:

www/GarageControl.html
www/ico/[several images]
www/[more .dart and .js files]

Once setup, the browser app can be accessed from URL:

http[s]://<IP or domain>:<port>/gc/

##REST URLs

Available URLs which respond to POST requests

/gc/garagedoor/state => get the current state
/gc/garagedoor/open  => open the door
/gc/garagedoor/close => close the door
/gc/garagedoor/stop  => stop the door
/gc/garagedoor/authlocation => check location is authorised for open command

Calling a command will trigger the door switch or have no effect if the transition is not allowed (e.g. calling stop in opened state)

The open and authlocation commands require 2 parameters: lat and lng.

All responses are by JSON e.g.:

{ 'auth': 'OK', 'state': 'opening' }

##Dependencies

Can be installed with following commands

sudo apt-get install python3 python3-pip
sudo pip-3.2 install bottle RPi.GPIO geopy CherryPy mock

##Configuration

Application settings should be placed in garage_config.json. Make a copy of the template file and edit with required configuration:

cp _garage_config.json garage_config.json

Most settings are editable at runtime e.g. changing authorised list can be made without restarting the server.

For GPIO port numbering see here

• door_switch_enabled Set to false during testing - disables invoking relay GPIO
• notify_enabled Set to true to enable email notification
• state_monitor_enabled Set to true to enable periodic check/notification of door open status
• port HTTP Port to listen on
• authorised List of gmail addresses authorised (see google_auth_proxy - address is sent in the X-Forwarded-For header)
• smtp_server / smtp_port SMTP server / port
• smtp_sender email of sender, usually your address
• smtp_recipient email of person/people to notify
• smtp_pwd_file location of file containing password to email server
• lat / lng Latitude/Longitude of your garage used during location authorisation. Use this to find out
• relay_channel GPIO port used to control the relay
• closed_channel / opened_channel GPIO port used to detect sensor on door closed / opened
• debounce_timeout_ms De-bounce timeout
• distance_limit_miles Distance allowed from lat/lnb coords given above allowed to use Open command
• state_monitor_limit_mins Limit in minutes before sending notification of open state
• state_monitor_interval_mins Period to check door state
• logfile Location to write log file

##Running

The service must be run as root to bind to the GPIO ports. The included run.sh can be used to start the server.

./run.sh &
tail -f nohup.out

Alternatively, install and register as a system service. The advantage is if your RPi is rebooted, the service wil automatically be started when the system returns. See the init.d folder for instructions.