The University of Alicante has developed a technology for travelers and tourists that allows you to turn your smartphone into something like an emergency beacon. To do this, you need an accessory in the form of a small antenna and an app. The highlight of the novelty is that it works on the basis of Wi-Fi and is designed for use outside cellular coverage areas.
The principle of operation is simple: if a person is in trouble and does not have a stable connection, he turns on the application and it starts periodically sending a message via Wi-Fi with a call for help. In the message, you can clarify that you are injured or lost, add your GPS coordinates, and thanks to a portable antenna, the signal is received at a distance of several kilometers. Anyone with a regular smartphone with Wi-Fi support will be able to receive such a signal and come to the rescue.
The developers say that there are no systems in the world that use Wi-Fi for geolocation in this way. There are devices that can track a working mobile phone in order to calculate its position by triangulation. But such an installation costs from $ 80, 000 and is mounted on transport. Here are the simplest accessories for no more than $ 700 per set.
The beacon for the smartphone has already been tested by specialists from the Spanish coast guard, the mine rescue service and military sailors.