homebridge-filebased-contactsensor

A filebased contact sensor for Homebridge

This plugin sensor monitors the modification time of an "open file" and a "closed file" to determine the state of a door.

For background, this is my way of kludging together integration of a yolink door sensors into homekit.

My particular setup relies on several interconnected components:

1. Yolink Door sensors https://shop.yosmart.com/collections/featured/products/outdoor-contact-sensor
2. IFTTT recipes that connects with yolink. I append to an open or closed file hosted on dropbox when receiving the corresponding event from yolink.
3. Synology Cloudsync synchronizing my dropbox account
4. Homebridge running as a docker container on a Synology NAS. I present the synchronized dropbox folder to the docker container
5. Finally this plugin

Configure the plugin as follows:

  {
        "name": "Patio Gate",
        "openpath": "/yolink/devices/patiogate/open.txt",
        "closedpath": "/yolink/devices/patiogate/closed.txt",
        "accessory": "DoorSensor"
    }
    
    

The logic works as follows:

• If neither the openpath or closedpath file exist, then the door is closed
• If only the open file exists, then the door is open
• If only the closed file exists, then the door is closed
• If both files exist, then compare the last modification time. The most recently modified file reflects the current state of the door.

I poll the status of the files every 1/2 second.

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Lots of improvements to make, especially around building the config properly.

Enjoy.