Phone's Wi-Fi hotspot acts as SOS beacon in disasters – New Scientist


New Scientist

Phone’s Wi-Fi hotspot acts as SOS beacon in disasters
New Scientist
With the victim app a trapped person can write a 27-character message such as “broken leg stuck in bank” or “need help fire on 4th floor” and a seeker app up to 100 metres away can pick it up. The app found two “trapped” people in a large-scale