Monitor code to be used with My-Garage( https://github.com/robboz4/My-Garage), implemented as PiGMi.
This is the monitor code that can be armed by the PiGMi settings page. It is configured to run and check the status of the doors every minute. If no change is detetcted it will keep looping and post a 60 minute no change message to the PiGMi log file. If there is a change and it is in passive mode, it will log the door in the PiGMi log file and reset the 60 minute counter. If it is active it will send an email and sms to the destinations configured in the code. It only sends one message and starts the 60 minute timer again.
To set up you need to have an email account where you can programmatically send email from, such as Google. For sms you need a cellphone number. It uses the same email account to send an SMS message via number@text.att.net . There are other phones providers that offer the same service. Check here http://www.computerhope.com/issues/ch000952.htm You can customize the email or sms message. For example in the sms message I added the url for my PiGMi. This way I can simply click on the link and open up the main page.
It should be set up to run on boot up. There are instructions on the main Raspberry Pi pages on how to do this. It is recommended to use the system service method, so it runs after Apache and PHP have been launched.
I'm workin on integrating with Homebridge and My-Garage. Currently you need to create a file(s) /var/www/html/statusX (where X = 0-2 depending on your number of garage doors). This is a temporary workaround. The file willhave either open or closed written in it depending on the state of the door. This file is read by Homebridge to reflect the status properly. It takes care of the manual buttons being used to open the door versus the web interface. For Homebridge they were out of sync.