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LoRa has become the tool of choice for the high altitude balloon community. At least in the UK, you're restricted to 10mW in the 434MHz band when airborne. Pe
by mhandley 7y ago
LoRa has become the tool of choice for the high altitude balloon community. At least in the UK, you're restricted to 10mW in the 434MHz band when airborne. People have been pretty successful at getting (very) slow-scan video from balloons at 30km altitude.
- ausjke 7y agonever thought LoRa can transmit video, isn't the bandwidth too low for that, I can not even imagine 320x240 video/mjpg using LoRA.
- tlrobinson 7y ago“Slow scan” TV is... slow. > It is a much slower method of still picture transmission, usually taking from about eight seconds to a couple of minutes, depending on the mode used, to transmit one image frame. https://en.m.wikipedia.org/wiki/Slow-scan_television https://en.m.wikipedia.org/wiki/Slow-scan_television
- Maxious 7y agohttps://github.com/projecthorus/wenet https://github.com/projecthorus/wenet is an example of using a RFM98W lora module with a raspberry pi/RTLSDR reciever (albeit at 115kbaud in FSK mode, but 50mW of tx power gets ranges of over 100km)
- squarefoot 7y agoThat is freaking interesting, 115kbps may seem low compared to usual broadband connections, but it's a lot in the embedded world. Also it would be more than enough to get very high quality voice communications. Codec2 which already does wonders with a fraction of a fraction of a fraction of that rate comes to mind. How long before someone puts LoRa encrypted walkie talkies on the market?