Van Guardian Sentinel

An Android application that identifies people and sends alerts with photos.

How it works

1. It runs a foreground service that continuously captures camera photos.
2. Those photos are processed with a ML model (EfficientDet) to identify objects.
3. When a person is found with enough confidence, the app sends a push to a ntfy.sh server with a recent photo and info about recognized objects.

Ntfy.sh

Ntfy.sh is a FOSS HTTP-based push notification server. You can use the public service for free or host your own server.

Quick server setup (Ntfy.sh)

1. Register at the ntfy.sh web client.
2. Subscribe to a randomly generated topic.
3. Place the generated topic URL in a secrets.properties file at the root of the project like this:

NTFY_URL=https://ntfy.sh/topic-name

Limitations

Due to how HTTP-based push servers work, the app sends two separate pushes: one with text and another with the image data. You'll see two separate messages in the web client.