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Life-Saving device for hikers in

areas without cellular reception

ReCares Hackathon 2018

Project duration: 72 hours

A Hikers emergency device for detecting & reporting wildfires.

This project has received a proposition for development and manufacturing.

Meet The Team

2 Industrial Designers

1 Engineer

Photo from Meira Levy.jpg
Ranger's System
About LoRa Protocol

Ranger is a device for hikers that enables receiving and transmitting emergency signals without cellular reception. The user’s location is determined by a GPS chip. The GPS and an electronic compass are used to determine the location of the event relative to the user. Ranger enables sending & receiving messages over low-frequency radio waves, based on the LoRa protocol.

The LoRaWAN® specification is a Low Power, Wide Area (LPWA) networking protocol designed to wirelessly connect battery operated ‘things’ to the internet in regional, national, or global networks, and targets key Internet of Things (IoT) requirements such as bi-directional communication, end-to-end security, mobility and localization services.

In simple words, each user with a Ranger device is transmitting to 10 km, while each Ranger device is becoming an "antenna" and increasing the signal zone. By using this technology, the Ranger's battery can perform for up to 3 weeks without being charged.

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How Does it work?
Getting away from wildfires

The user can report real-time injuries or environmental threats. The Ranger's alert display is based on an LED screen that is projected through the ABS material. The user can send to emergency services or other Ranger users in the area information about a fire nearby. The location of the fire is computed by a combination of 2 or more reports.

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Image by Ali Kazal

When a user receives a fire alert, a fire alert along with a digital compass are displayed on the ranger's screen to help them navigate outide of the danger zone. The compass is showing the user where is the fire direction relative to them by presenting guiding arrows on the display.


While receiving an alert or when pressing the SOS button, there is a strong beeping sound coming from the Ranger. The alarm sound when pressing the SOS button to indicate their location in case of any kind of emergency.



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