{"id":18310237,"url":"https://github.com/creaktive/flare","last_synced_at":"2025-10-16T19:32:07.913Z","repository":{"id":21677739,"uuid":"24998918","full_name":"creaktive/flare","owner":"creaktive","description":"nRF905 single-chip radio transceiver demodulator + FLARM protocol decoder","archived":false,"fork":false,"pushed_at":"2018-04-25T10:03:40.000Z","size":64,"stargazers_count":56,"open_issues_count":5,"forks_count":19,"subscribers_count":21,"default_branch":"master","last_synced_at":"2025-03-21T08:34:51.656Z","etag":null,"topics":["aviation","flarm","nrf905","radio","rtl-sdr","traffic"],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/creaktive.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2014-10-09T16:46:37.000Z","updated_at":"2024-05-01T07:39:14.000Z","dependencies_parsed_at":"2022-07-13T23:50:27.665Z","dependency_job_id":null,"html_url":"https://github.com/creaktive/flare","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/creaktive%2Fflare","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/creaktive%2Fflare/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/creaktive%2Fflare/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/creaktive%2Fflare/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/creaktive","download_url":"https://codeload.github.com/creaktive/flare/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247375893,"owners_count":20929135,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["aviation","flarm","nrf905","radio","rtl-sdr","traffic"],"created_at":"2024-11-05T16:13:48.795Z","updated_at":"2025-10-16T19:32:02.876Z","avatar_url":"https://github.com/creaktive.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"[![Build Status](https://travis-ci.org/creaktive/flare.png?branch=master)](https://travis-ci.org/creaktive/flare \"Build Status\")\n\n# nRF905 demodulator/FLARM decoder\n\n```bash\nmake                                            # compile everything\nrtl_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\n    ./nrf905_demod 29 |                         # demodulate nRF905 packets with 29 bytes per message\n    ./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\n```\n\n# References\n - [Controlling the Wattcher Display](https://pushstack.wordpress.com/2014/07/12/controlling-the-wattcher-display/)\n - [FLARM receiver for GNU Radio](https://github.com/argilo/gr-flarm)\n - [G.9959(ZWave) demodulator](https://github.com/andersesbensen/rtl-zwave)\n - [Sniffing and decoding NRF24L01+ and Bluetooth LE packets for under $30](http://blog.cyberexplorer.me/2014/01/sniffing-and-decoding-nrf24l01-and.html)\n - [Using a RTLSDR dongle to validate NRF905 configuration](http://www.embeddedrelated.com/showarticle/548.php)\n - [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)\n - [An Arctangent Type Wideband PM/FM Demodulator with Improved Performances](http://ketabkhanemelli.com/Scientific/IEEE/iel2/565/3783/00140755.pdf)\n - [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)\n - [The Sliding DFT](http://www.comm.toronto.edu/~dimitris/ece431/slidingdft.pdf)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcreaktive%2Fflare","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcreaktive%2Fflare","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcreaktive%2Fflare/lists"}