GPS-based friend finder using LoRa radio technology.
No cellular network required.
Built for real-world off-grid adventures
Your device always points to your friend's location with precise heading calculation
Up to 3km communication range with low power consumption
Precise satellite positioning with live coordinate sharing
No cellular network, WiFi, or internet required
Portable design for extended outdoor adventures
Build your own, modify, and improve. Fully documented.
Simple technology, powerful results
Each device gets its precise location from satellites
Coordinates are transmitted via long-range radio
Device calculates direction and distance to your friend
The compass always points toward your friend's location
Try our interactive compass demo powered by WebAssembly. Experience the same algorithms running on the actual hardware.
Everything you need to build your own SideQuester
Main microcontroller with WiFi & Bluetooth
~$5Long-range radio communication (3km+)
~$12Satellite positioning receiver
~$83-axis digital magnetometer
~$3Color TFT display with GC9A01 driver
~$10LiPo battery, wires, enclosure
~$15Total Cost per Device: ~$53
You need 2 devices (one for you, one for your friend)
Never lose your group in crowded venues where cell towers are overloaded
Stay connected in remote areas with no cellular coverage
Track your friends across the mountain slopes
Bike tours, trail running, or any outdoor group activity
All source code, schematics, and documentation are available on GitHub