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what kind of speed can LoRa really do? (lemmy.zip)

submitted 3 days ago by shortwavesurfer@lemmy.zip to c/meshtastic@mander.xyz

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scenario: In the future, it is possible to update your node on your 200-foot tower by simply sending the firmware file directly to the node with a zero hop direct connection

I know short fast can get about 10kbps (1KB/s) across the link, but thats just too slow to send a 1.5MB firmware update. I know that short turbo is illegal in some places, and I believe it's because it's using a bandwidth of 500KHz instead of the 250KHz of short fast.

So if you turn the error correction way down to almost off what is about the maximum bandwidth you could hope to possibly get out of the LoRa connection at 250KHz?

Even if you could pull off 125kbps (12.5KB/s) that would only require two minutes to send the firmware file from your node to the receiving node up on the tower.

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[–] FapFlop@lemmy.world 2 points 3 days ago

I’ve been wondering if a parted file scheme wouldn’t work. Sure, downloading 1.5MB over 10Kb/s in one shot might take a while, but what if I have more than a while? Download it in 200B messages over 3 months.

7500 messages over 90 days is only a little over 80 messages a day.