Re:Meshtastic is an encrypted communications platform for th...
by angst_ridden on Thursday July 07, 2022 @01:40PM
(#32016992)
Around October 2020, there was a group of people putting up battery powered LoRa repeater nodes in the hills around Los Angeles. I had a few LilyGo TTGO units, one with DisasterRadio and one with Meshtastic installed.
I could get occasional packets through to one of the nodes that was about 6 miles away (line-of-sight).
My conclusion was that for a city, a much higher transceiver density would be needed if you wanted viable communications. It's not outside the realm of possibility. The units themselves are less than $20/each in bulk, and could be powered with a $5 solar panel/battery rig. Placement of the units would be key.
I saw some Hong Kong activists online post designs for "throwable" battery-powered units. The idea there was to toss out dozens of them during events where non-internet mesh communications would be needed. Seems like an interesting use case, although jamming and the end points (e.g., burner phones with WiFi->LoRa or Bluetooth->LoRa) are still the weak points in a scheme like that.
I could get occasional packets through to one of the nodes that was about 6 miles away (line-of-sight).
My conclusion was that for a city, a much higher transceiver density would be needed if you wanted viable communications. It's not outside the realm of possibility. The units themselves are less than $20/each in bulk, and could be powered with a $5 solar panel/battery rig. Placement of the units would be key.
I saw some Hong Kong activists online post designs for "throwable" battery-powered units. The idea there was to toss out dozens of them during events where non-internet mesh communications would be needed. Seems like an interesting use case, although jamming and the end points (e.g., burner phones with WiFi->LoRa or Bluetooth->LoRa) are still the weak points in a scheme like that.