⚠️ Please note
This product is not ready to ship. Estimated shipping time is 1–2 weeks after placing your order.
For updates and discussions, you can join our Facebook group.
The BMK GPS System consists of two parts:
- Alti-Loc GPS Beacon: A lightweight, low-power radio beacon with built-in GPS and altimeter.
- FlexiDisplay Hand Unit: A powerful handheld receiver with 434 MHz Tx/Rx, altimeter, compass, gyroscope, WiFi, Bluetooth and more. Firmware can be updated easily via a web browser, thanks to its built-in WiFi access point.
📄 Download Manual
🧩 Firmware Releases
Latest firmware available here:
https://github.com/melihkarakelle/FlexiDisplay-Firmware-Releases
📱 The App
The FlexiDisplay unit has built-in Bluetooth 4.0 and can send beacon data to your phone or tablet via the BMK Finder app.
Android APK Info:
Since Google Play requires 1,000 downloads and 20 beta-testers, the Android app is provided as an APK file. Please enable APK installations on your device if prompted.
🎥 Demo Video
🛠️ System Features
- Battery life: FlexiDisplay runs 8+ hours per charge
- Alti-Loc power usage: 30 mA in flight, 7 mA when stationary
- Data update rate: 0.5s (climbing), 1s (cruise), 8s (stationary)
- Range: Over 20 km in-air under UK conditions
- Memory: 1MB onboard (stores up to 10 flights in CSV/KML)
- Remote DT (RCDT): Compatible with BMK B1 and B2
- Signal strength: RSSI bar helps under poor GPS conditions
- Last known location: Saved to display even if beacon disconnects
- Low battery mode: Under 3.3 V, beacon disables GPS to save power and transmits last location
- GPS Low indicator: Alerts if GPS accuracy drops below ~10 m
- Altimeter: Live altitude, climb, and sink rate display
- QR code support: Scan and view last location in Google Maps
- Flight summary: Displays altitude and telemetry from past flights
- Multi-beacon tracking: View your beacon and others without binding