41–50 of 168 posts
E.g. drones geographically organize themselves into a chain with each of them serving as a mesh-network node, then each of them, including the tip of a chain, can be controlled by operators, and the whole setup is a closed network which works without requiring Internet access
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LoRa would go much farther than Wifi on 2.4ghz. Lora uses Chirp Spread Spectrum (CSS) modulation while wifi uses OFDM (Orthogonal Frequency Division Multiplexing). The first being designed for extreme range while the latter for bandwidth. At 2.4ghz you could probably get LoRa connections up to 6 miles with the right antenna height.
Just use Unifi Airfiber for 6 miles at gigabit speeds. If you're relying on line of sight then 2.4GHz is nonsense. And if you don't have line of sight then no you're not getting 6 miles
That stuff is good for drone warfare, mesh networks already been used in Ukraine E.g. drones geographically organize themselves into a chain with each of them serving as a mesh-network node, then each of them, including the tip of a chain, can be controlled by operators, and the whole setup is a closed network which works without requiring Internet access
Meshing two digit number of drones on a military grade reliability is a real uphill battle with chirp based protocols, as the high ToA reaches congestion fast.
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TBH Meshtastic's code isn't great either. It's neat to play with but not robust.
It sucks how everything feels like a toy. I think meshtastic is the closest thing to a “product”. They made a bunch of bad architectural decisions that are haunting them now like how nodes broadcast its info.
Earlier quoted context omitted.
LoRa would go much farther than Wifi on 2.4ghz. Lora uses Chirp Spread Spectrum (CSS) modulation while wifi uses OFDM (Orthogonal Frequency Division Multiplexing). The first being designed for extreme range while the latter for bandwidth. At 2.4ghz you could probably get LoRa connections up to 6 miles with the right antenna height.
6 miles seems a very optimistic estimation: 2.4Ghz propagation is very reduced by obstacles like buildings or trees and at that frequency the atmospheric water (fog, rain, humidity) have a big impact on propagation. And you need also to consider that 2.4Ghz is a very polluted band, then the noise floor is significatevly higher than in the 865/915 Mhz. Moreover at 2.4Ghz the Fresnel window is smaller and the risk of m…
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I’m guessing it’s just haloW without the licensing requirements.
Gonna reply here, but this isn't about you or this post: HN has a lot of us that have ~0 idea what you'd use this for, even when we steelman, all we can do is vaguely handwave about easier to setup wireless internet on a vast compound we own. Would be really cool if someone could hop in and just give a couple one off examples, i guess? Only other one handwave I can think of is IOT x assembly line stuff for businesses…
That stuff is good for drone warfare, mesh networks already been used in Ukraine E.g. drones geographically organize themselves into a chain with each of them serving as a mesh-network node, then each of them, including the tip of a chain, can be controlled by operators, and the whole setup is a closed network which works without requiring Internet access
> each of them serving as a mesh-network node
might have worked for a bit in the past, but is easily disrupted by jammers, and forced a switch to fiber-optic in-theater. People have learned from that and don't bother with radio anymore, even in new theaters.
That stuff is good for drone warfare, mesh networks already been used in Ukraine E.g. drones geographically organize themselves into a chain with each of them serving as a mesh-network node, then each of them, including the tip of a chain, can be controlled by operators, and the whole setup is a closed network which works without requiring Internet access
> That stuff is good for drone warfare > each of them serving as a mesh-network node might have worked for a bit in the past, but is easily disrupted by jammers, and forced a switch to fiber-optic in-theater. People have learned from that and don't bother with radio anymore, even in new theaters.
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The issue you linked to is about MeshCore using channels that are too narrow . A mesh system claiming to offer 100x bandwidth is probably not violating regulations in that particular way.
There are more rules being broken. For example, overusing the frequency which effectively prevents others users from sending messages. In the end, won't be used.
Sounds like a solution to a problem already solved by DECT NR+ -- a 5G technology that is 'subscription free'.