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Emitting Hellschreiber from a Raspberry Pi GPIO: combining gr-hellschreiber with gr-rpitx

Talkat FOSDEM 2022 · on Sunday, 2022-02-06· at 14:00· D.radio· [embedded-and-hardware, web-platform]

speaker

name:Jean-Michel Friedt, Thomas Lavarenne
links:none on file

resources

video:https://video.fosdem.org/2022/D.radio/radio_hellschreiber.mp4
slides:https://fosdem.org/2022/schedule/event/radio_hellschreiber/attachments/slides/4827/export/events/attachments/radio_hellschreiber/slides/4827/fosdem2022.pdf

summary

Shows how to generate Hellschreiber signals from a Raspberry Pi by using a GPIO pin as an RF emitter with gr-rpitx (an out-of-tree GNU Radio sink that generalizes rpitx) and transmit them; captures the transmission with an RTL-SDR DVB-T receiver and decodes it with gr-hellschreiber. Also discusses working with GNU Radio 3.9 and practical issues encountered when porting gr-acars to that version.

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