Meshtastic: Difference between revisions
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* network coverage: [https://map.meshnet.nl/ meshnet map] | * network coverage: [https://map.meshnet.nl/ meshnet map] | ||
* do nodes forward packets that do not belong to their "own" network? -> appears to be so! | * do nodes forward packets that do not belong to their "own" network? -> appears to be so! | ||
My node: https://db.meshnet.nl/da639b54.html | |||
== Design == | |||
=== Option 1 === | |||
plans: | |||
* just use the 'default' channel: longfast + default key | |||
* put my data on an unused port number, e.g. 300 | |||
pro&con: | |||
* + simple | |||
* + my data is routed | |||
* - there are only 256 (or so) port numbers globally, so cannot really differentiate | |||
* could combat this with a kind of secure checksum | |||
=== Option 2 === | |||
plans: | |||
* | |||
== Protocol == | == Protocol == | ||
Revision as of 09:02, 9 March 2025
| Project Meshtastic | |
|---|---|
| |
| Experiments with Meshtastic | |
| Status | In progress |
| Contact | bertrik |
| Last Update | 2025-03-09 |
1. Intro
The plan is to use Meshtastic to transfer citizen science measurement data.
Stuff to figure out:
- network coverage: meshnet map
- do nodes forward packets that do not belong to their "own" network? -> appears to be so!
My node: https://db.meshnet.nl/da639b54.html
2. Design
2.1. Option 1
plans:
- just use the 'default' channel: longfast + default key
- put my data on an unused port number, e.g. 300
pro&con:
- + simple
- + my data is routed
- - there are only 256 (or so) port numbers globally, so cannot really differentiate
- could combat this with a kind of secure checksum
2.2. Option 2
plans:
3. Protocol
See https://meshtastic.org/docs/overview/mesh-algo/
Quick links:
- Port number: https://buf.build/meshtastic/protobufs/docs/main:meshtastic#meshtastic.PortNum
- MQTT topic organization: https://meshtastic.org/docs/software/integrations/mqtt/#mqtt-topics
4. Hardware
Nice antenna? https://nl.aliexpress.com/item/1005007301116616.html
5. MQTT
In the netherlands, data is typically sent to the 'boreft' MQTT server, for example
mosquitto_sub -h mqtt.meshnet.nl -u boreft -P meshboreft -t "#" -v
Examples of typical data:
msh/7460-7463/2/stat/!da5857c0 online msh/EU_868/NL/2/e/LongFast/!eb66115c �%]�g(=���gx�� H5��Aw=]�gE��H`���������LongFast␦