https://github.com/creaktive/flare

nRF905 single-chip radio transceiver demodulator + FLARM protocol decoder
https://github.com/creaktive/flare

aviation flarm nrf905 radio rtl-sdr traffic

Last synced: 8 months ago
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nRF905 single-chip radio transceiver demodulator + FLARM protocol decoder

• Host: GitHub
• URL: https://github.com/creaktive/flare
• Owner: creaktive
• License: gpl-3.0
• Created: 2014-10-09T16:46:37.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2018-04-25T10:03:40.000Z (about 8 years ago)
• Last Synced: 2025-03-21T08:34:51.656Z (about 1 year ago)
• Topics: aviation, flarm, nrf905, radio, rtl-sdr, traffic
• Language: C
• Homepage:
• Size: 62.5 KB
• Stars: 56
• Watchers: 21
• Forks: 19
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
[![Build Status](https://travis-ci.org/creaktive/flare.png?branch=master)](https://travis-ci.org/creaktive/flare "Build Status")

# nRF905 demodulator/FLARM decoder

```bash

make                                            # compile everything

rtl_sdr -f 868.05m -s 1.6m -g 49.6 -p 49 - |    # tune to 868.05 MHz, set sample rate to 1.6 MHz, gain to 49.6 dB, and tuner error to 49 ppm

    ./nrf905_demod 29 |                         # demodulate nRF905 packets with 29 bytes per message

    ./flarm_decode 43.21 5.43 12                # decode FLARM packets for ground station located at latitude 43.21, longitude 5.43 and geoid height 12

```

# References

 - [Controlling the Wattcher Display](https://pushstack.wordpress.com/2014/07/12/controlling-the-wattcher-display/)

 - [FLARM receiver for GNU Radio](https://github.com/argilo/gr-flarm)

 - [G.9959(ZWave) demodulator](https://github.com/andersesbensen/rtl-zwave)

 - [Sniffing and decoding NRF24L01+ and Bluetooth LE packets for under $30](http://blog.cyberexplorer.me/2014/01/sniffing-and-decoding-nrf24l01-and.html)

 - [Using a RTLSDR dongle to validate NRF905 configuration](http://www.embeddedrelated.com/showarticle/548.php)

 - [Implementation of Digital Signal Processing: Some Background on GFSK Modulation](http://wwwhome.ewi.utwente.nl/~gerezsh/sendfile/sendfile.php/gfsk-intro.pdf?sendfile=gfsk-intro.pdf)

 - [An Arctangent Type Wideband PM/FM Demodulator with Improved Performances](http://ketabkhanemelli.com/Scientific/IEEE/iel2/565/3783/00140755.pdf)

 - [nRF905 Single chip 433/868/915MHz Transceiver Product Specification](http://www.nordicsemi.com/eng/content/download/2452/29528/file/Product_Specification_nRF905_v1.5.pdf)

 - [The Sliding DFT](http://www.comm.toronto.edu/~dimitris/ece431/slidingdft.pdf)