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The project is really interesting and I think I am going to try it. It looks like it's text only? would it be possible to add a very filtered, low-bandwidth au
by Luker88 6y ago
The project is really interesting and I think I am going to try it.
It looks like it's text only? would it be possible to add a very filtered, low-bandwidth audio stream since the phone can do all the calculations?
I have no idea on the actual bandwidth of these devices, wikipedia says LoRa is 0.3-27 Kb/s and Opus should work decently at ~10Kb/s I think. So maybe?
Although audio would probably be half duplex and only point-to-point instead of mesh, but it still could be interesting
- voltagex_ 6y agoHave a look at Codec2 [1] 1: https://en.wikipedia.org/wiki/Codec_2 https://en.wikipedia.org/wiki/Codec_2
- vvanders 6y agoCodec2 is part of it but you need a lot more pieces on top(framing, modulation, etc). LoRA doesn't really have the bandwidth for Codec2(for a few reasons, mostly power and the way LoRA handles channel congestion). M17[1] has been making really big strides in this space and really excited to start seeing a proper open hardware/open source digital radio stack. [1] https://m17project.org/ https://m17project.org/
- s800 6y agoThe duty cycle requirement preclude this type of use. You should be "off the air" ~99% of the time.
- morpheuskafka 6y agoAnother thing to consider would be latency due to retransmissions. Something like voice notes would probably be better than a live call send it could be re-transmitted as many times as necessary and broken into small chunks.