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Make mesh networking work nicely for unicast messages #3

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X-Ryl669 opened this issue Feb 27, 2020 · 7 comments
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Make mesh networking work nicely for unicast messages #3

X-Ryl669 opened this issue Feb 27, 2020 · 7 comments
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@geeksville
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@X-Ryl669
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I haven't read the source code, but I'm wondering if and how does the system works without a gateway, and in that case, how do you intend to do mesh networking ?
@geeksville
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Hi,

I initially used the RadioHead mesh routing algorithm which worked but is pretty suboptimal because really almost all of my packets are better sent as broadcasts. So I have that commented out right now.

See the second heading here for ideas I have been considering (also I've been trolling through a bunch of libs and papers): https://github.com/geeksville/Meshtastic-esp32/blob/master/docs/sw-design.md

As a side effect of the hackaday post some kind person pointed me at this: sudomesh/LoRaLayer2#10 which looks super promising (and they are just across the bay from me ;-) )

I think the current broadcast solution will work fine for initial usage, but we'll want to have mesh turned back on sometime in the next couple of months.

@geeksville geeksville added this to the BeforeBeta milestone Feb 28, 2020
@geeksville geeksville self-assigned this Mar 5, 2020
@geeksville geeksville changed the title How do you intend to do mesh networking ? Reactivate mesh networking (currently we just broadcast) Mar 6, 2020
@geeksville
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Mesh networking is now basically fixed, but keeping this open for a few enancements should do:

  • When doing mesh flooding we should include a random delay before each rebroadcast.
  • Implement DSR for unicast messages (currently we are just flooding broadcasts)
  • See remaining work items listed in comment at top of Router.cpp

@geeksville geeksville changed the title Reactivate mesh networking (currently we just broadcast) Make mesh networking work nicely for unicast messages Apr 17, 2020
@geeksville geeksville added bug Something isn't working and removed documentation labels Apr 17, 2020
@cyclomies
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cyclomies commented Apr 21, 2020 •
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Mesh networking is now basically fixed, but keeping this open for a few enancements should do:

  • When doing mesh flooding we should include a random delay before each rebroadcast.
  • Implement DSR for unicast messages (currently we are just flooding broadcasts)
  • See remaining work items listed in comment at top of Router.cpp

I did read the files. Nice job @geeksville!

Unfortunately, I did not find information (most likely just didn't understand..) of what components the packet header is built of? Are the components, in the headers, kept same in every packet/message type?

The mesh is intended to work, correct me if I'm wrong, by these steps:

  • set channel settings from the app
  • send user information to the mesh by flooding
  • receive answers from the mesh of other nodes (change our node ID if necessary)
  • update our node database of other nodes (of all messages "heard")
  • send location update to the mesh (periodically or by request)
  • flood all messages to the mesh (in future, flood only messages with not only one recipient?)
  • switch to DSR to unicast messages (not yet in use), using the node database information
  • if a node is not in our node database, send a DSR route request (not yet in use)
  • update our node database per answers (not yet in use)
  • continue unicast messages per DSR and our node databases (not yet in use)

@ohcdh
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ohcdh commented Apr 21, 2020

This is all new to me, but this was a study done by Ram Ramanathan et al involved in the GoTenna device, "Long-Range Short-Burst Mobile Mesh Networking:Architecture and Evaluation"
https://cdn.shopify.com/s/files/1/0046/7524/0005/files/goTenna_Long-Range_Short-Burst_SECON.pdf?8213

@geeksville
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@ohcdh just because I'm scared about patents I don't think I'll read that one ;-)

@geeksville
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This issue has been mentioned on Meshtastic. There might be relevant details there:

https://meshtastic.discourse.group/t/next-work-items-in-my-queue/153/1

geeksville pushed a commit that referenced this issue Aug 10, 2020
@Dafeman
Merge pull request #3 from Dafeman/README-GUI-update
a23f327 
Update GUI Install
@retrodime retrodime mentioned this issue Sep 11, 2020
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mc-hamster added a commit that referenced this issue Sep 17, 2020
@mc-hamster
Merge pull request #3 from meshtastic/master
c656a95 
Update from meshtastic main
geeksville pushed a commit that referenced this issue Oct 29, 2020
@BeardyWalrus
Merge pull request #3 from meshtastic/master
26bafb4 
Update from upstream
@mc-hamster mc-hamster mentioned this issue Jan 5, 2021
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@geeksville geeksville mentioned this issue Aug 1, 2021
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ducky64 added a commit to ducky64/Meshtastic-device that referenced this issue Oct 14, 2021
@ducky64
Fix for T-echo to not have Critical Error meshtastic#3 on startup
a76e7c7
geeksville added a commit that referenced this issue Oct 15, 2021
@geeksville
Merge pull request #882 from ducky64/techofix
8e45c5e 
Fix for T-echo to not have Critical Error #3 on startup
@sachaw sachaw removed this from the BeforeBeta milestone Dec 12, 2021
@mc-hamster
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closing issues. this is a question rather than a bug of feature request.

@newtocrypto newtocrypto mentioned this issue Dec 26, 2021
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mc-hamster pushed a commit that referenced this issue Jan 5, 2022
@linagee
Merge pull request #3 from meshtastic/master
cb0073f 
Merge master
mkinney added a commit that referenced this issue Jan 24, 2022
@mkinney
Merge pull request #3 from meshtastic/master
be0b997 
refresh branch from master
@lewisxhe lewisxhe mentioned this issue Aug 26, 2022
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@MasterSPB MasterSPB mentioned this issue Mar 21, 2023
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@GUVWAF GUVWAF mentioned this issue Apr 20, 2023
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@mverch67 mverch67 mentioned this issue Aug 12, 2023
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thebentern added a commit that referenced this issue Nov 5, 2023
@RicInNewMexico @thebentern
INA3221 / Power Telemetry Payload Variant Implementation (#2916)
f570204 
* INA3221 / Power Telemetry Variant Implementation
	modified:   platformio.ini
	modified:   src/configuration.h
	modified:   src/detect/ScanI2C.h
	modified:   src/detect/ScanI2CTwoWire.cpp
	modified:   src/main.cpp
	modified:   src/modules/Modules.cpp
	new file:   src/modules/Telemetry/PowerTelemetry.cpp
	new file:   src/modules/Telemetry/PowerTelemetry.h
	new file:   src/modules/Telemetry/Sensor/INA3221Sensor.cpp
	new file:   src/modules/Telemetry/Sensor/INA3221Sensor.h
	modified:   src/mqtt/MQTT.cpp

* ifdef for portduino / linux native
	modified:   src/modules/Telemetry/PowerTelemetry.cpp

* try #2
	modified:   src/modules/Modules.cpp
	modified:   src/modules/Telemetry/PowerTelemetry.cpp
	deleted:    variants/xiao_ble/1.0.0/libraries/SPI/SPI.cpp

* try #3
	modified:   src/modules/Modules.cpp

* try #4
	modified:   src/modules/Telemetry/PowerTelemetry.cpp

* try #5?
	modified:   src/modules/Telemetry/PowerTelemetry.cpp

* try #6
	modified:   src/modules/Telemetry/PowerTelemetry.cpp

---------

Co-authored-by: Ben Meadors <[email protected]>
@lora-gateway lora-gateway mentioned this issue Nov 29, 2023
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@geeksville @X-Ryl669 @sachaw @mc-hamster @ohcdh @cyclomies