Architecture
Network topology, channels, and link budgets.
Network Topology
Meshtastic flood routing — every node relays for every other node. Station G2s on elevated sites provide backbone coverage, T-Deck clients relay opportunistically, and FireElmo-SDR bridges to external networks.
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Station G2 Link Budget
30 dBm TX + 6 dBi antenna = 36 dBm EIRP. Max path loss: 171 dB. Estimated range: 20+ km line-of-sight.
T-Deck Link Budget
22 dBm TX + 2 dBi antenna = 24 dBm EIRP. Max path loss: 160 dB. Estimated range: 5-10 km line-of-sight.
Hop Limit
Set to 5 (default is 3). Higher to cover the full L-A area.
Channel Architecture
| Index | Channel | Purpose | PSK |
|---|---|---|---|
| 0 | LA-Mesh | Primary private channel | Unique 256-bit (shared in-person) |
| 1 | LA-Admin | Operator coordination | Separate unique 256-bit |
| 2 | LA-Emergcy | Emergency use only | Separate unique 256-bit |
| 3 | LongFast | Public Meshtastic default | AQ== (well-known default) |
Channels 0-2 use unique PSKs shared face-to-face and rotated quarterly. Channel 3 is the default public Meshtastic channel — LA-Mesh nodes can talk to any Meshtastic device on the default key. Do not send sensitive traffic on channel 3.