Now there is another addition to the list of ways you can reuse your old smartphone: by turning it into a personal surveillance system to catch any unexpected guest or intruder trying to circumvent your privacy and security.
The credit goes to a new open-source Android app called Haven created by NSA whistleblower Edward Snowden, Freedom of the Press Foundation, and the Guardian Project.
When installed on Android phone, the Haven app activates different sensors on the device. It uses the front and back camera sensors to look for any motion change in surroundings. It takes the help of the microphone to spot changes in the volume level.
The app uses the ambient light sensor to notice changes in the surrounding’s lighting. The accelerometer is used to detect motion changes of the device itself. The app also observes whether the device is charging or losing power.
You can easily monitor all the things happening around the Haven-powered device as it regularly sends recorded feed and other information to your main smartphone via Signal. The same can be accessed in Haven’s log over the internet using Tor or if you have physical access to the device.
Where does the Haven app find its utility? Well, there are many places. You intelligently place a Haven powered device beside your valuables to capture any suspicious activity and prevent unwanted things from happening. For instance, it could be your laptop containing some top-secret documents, or you can use it to protect your precious gifts from your friends.