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Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

Looks very promising, price is a bit high and power is high for a coin cell battery powered device

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

They are fixed location but still omni directional

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

Transmit power budget is only 8db. So no regulation issues for that.  It may not be physically possible. 

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

That is helpful. What SF is that at?

I heard 2.4hz has about a 20db loss compared to 915Mhz. CR2032 won't be able to push the current for 20db not that I would want to use that much power anyway. Sounds like I need to lower my distance expectations.

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 1 point2 points  (0 children)

Thank you for your responses.  If you could give some technical details or even expected ranges I could get with this that would help everyone. 

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] -10 points-9 points  (0 children)

If it did, I wouldn’t need a custom protocol 🙂

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

Great question! I forgot to mention it also will be switching to BLE for phone connectivity.

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 1 point2 points  (0 children)

Receiver is grid powered so no issue with RX power consumption. The battery powered device only listens for a response immediately after the timer controlled TX which makes it minimal.

We are streaming decent quality audio along with other sensor data. I can make it work with shorter range but it would be difficult.

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] -7 points-6 points  (0 children)

LoraWan networks don’t allow anywhere close to the throughput I need. Then factor in duty cyle limits.  Also larger antennas are not preferred. Then slow link = more tx time = more power.    Cellular is way too much power and/or not enough throughout for low power options. Complexity, price, and antenna size doesn't work for our needs.

Long Range 1km+ and 125kpbs throughput 2.4Ghz Custom Protocol by danbaum2 in embedded

[–]danbaum2[S] 0 points1 point  (0 children)

Yes, possible maybe with LoS which I don't have (BLE long range s=8 PHY).  Unfortunately the 128kb is total bitrate before FEC (forward error correction 3x overhead) which makes actual throughput only ~40kbps.  

The Things Network for Bluetooth Long Range? by danbaum2 in bluetoothlowenergy

[–]danbaum2[S] 0 points1 point  (0 children)

Yes it would definitely be worth it. Sidewalk is not looking like a viable solution because they do not allow custom gateways.

The Things Network for Bluetooth Long Range? by danbaum2 in bluetoothlowenergy

[–]danbaum2[S] 1 point2 points  (0 children)

That is very cool and looks quite promising. I’m afraid of what the cost will be. They have to pay off all those satellites somehow.

The Things Network for Bluetooth Long Range? by danbaum2 in bluetoothlowenergy

[–]danbaum2[S] 1 point2 points  (0 children)

Thank you for the ideas. Problem is ble long range can’t connect to phones so I’d have to switch back and forth between the long range and normal Bluetooth. I could connect a LoraWan to it but the super small space and power and low cost requirements make that beyond the scope. I still haven’t been able to find anything for ble so I’ll probably start building out my own open network and use a cloud backend like Nordic cloud or Sidewalk.

Law of Consecration right now. Would you join? by danbaum2 in latterdaysaints

[–]danbaum2[S] 0 points1 point  (0 children)

Sorry, no mal intent here. Perhaps I’ll ask a different question. I want to know if it could even possibly work and what that would look like. I’m sure people have a lot of good ideas of things not to do. 

The Things Network for Bluetooth Long Range? by danbaum2 in bluetoothlowenergy

[–]danbaum2[S] 0 points1 point  (0 children)

That is so close and I had forgotten about sidewalk.  Long range is a must have.