Presence Publisher

Presence Publisher is a simple app that regularly publishes to a configurable MQTT topic whenever connected to a given Wi-Fi network or in proximity to a Bluetooth beacon. This can be used to integrate the presence of your phone in home automation.

Several networks and beacons can be configured at once, and the message to be sent can be configured for each of them.

If your MQTT server is available on the internet, you can also choose to send an 'offline' message whenever you are not connected to any of the configured Wi-Fi networks and not in range of any configured beacon.

As an additional feature, you can send the battery level of your device whenever a condition is met, so that you can recharge it before it turns off.

The app uses Android's Work Manager library, so notifications are sent even if the phone is in stand-by.