Match the USA/Canada Preset: What MeshCore Nodes Should Run
Brazos Valley Mesh runs MeshCore. If your node is on the wrong radio preset, you will sit in silence even with a perfect antenna. What has worked for us across Bryan–College Station and rural Brazos County is simple and sticky: flash MeshCore, pick the right role, and match the USA/Canada (Recommended) preset so companions and repeaters are speaking the same radio language.
Why a new node suddenly hears nobody
MeshCore nodes only talk when they share the same radio parameters—frequency, bandwidth, and spreading factor. The built-in USA/Canada (Recommended) preset sets those for North American 915 MHz hardware. Pick a different region, hand-tune the wrong values, or leave a brand-new flash on settings that do not match the local mesh, and the map looks empty even when neighbors are active a few blocks away.
As of the narrow USA/Canada migration, that recommended preset commonly resolves to about 910.525 MHz, SF7, BW 62.5 kHz, CR5. Firmware can change those numbers. In practice we do not ask newcomers to memorize a chart. We ask them to choose USA/Canada (Recommended) in the MeshCore app or config tool, then confirm with `get radio` on a repeater when they can. The authoritative step is the preset name, not a screenshot of somebody else’s custom values from another metro.
Brazos Valley Mesh is clear on purpose: run MeshCore on the USA/Canada recommended preset so newcomers are not orphaned into an invisible island while the rest of the valley chats.
Companion vs repeater, the roles that matter here
MeshCore’s fixed roles match how we actually deploy. A companion pairs to your phone over Bluetooth (or USB/Wi‑Fi companion builds) and acts as your pocket client. Companions do not repeat other people’s traffic. A repeater is a fixed, usually powered node that forwards MeshCore packets and extends coverage. A room server can become a shared message hub later; it is not required for a first node.
A companion alone is a direct radio to whoever is in range. A repeater up high is what turns pocket radios into a town mesh. That is the same shape as the rest of Brazos Valley Mesh: companions stay with people; repeaters stay outside when we can manage it and do the long hops.
How we check and fix the radio preset
For a companion, we flash Companion firmware from the official MeshCore flasher at flasher.meshcore.io in Chrome or Edge with a real data USB cable, install the MeshCore app, pair over Bluetooth, open radio or preset settings, choose USA/Canada (Recommended), save, and wait for the radio to apply. Neighbors and repeater adverts that were invisible on the wrong preset usually start showing up once the language matches.
For a repeater or room server, we flash Repeater firmware for the exact board, configure over USB with the MeshCore config tools or serial CLI, apply USA/Canada (Recommended) (or the matching `set radio` values if the group ever publishes a deliberate override), reboot if the tool says radio changes need it, and confirm with `get radio` plus a nearby companion before closing the enclosure or climbing the ladder. Confirming on the ground has saved us more embarrassment than any fancy antenna.
When someone says nobody hears them, we still walk the same short list in conversation:
- Is the firmware role correct?
- Is the radio on USA/Canada (Recommended)?
- Is the LoRa antenna on the LoRa connector rather than a Bluetooth stub?
- Are you outdoors or at a window instead of deep inside a metal building?
- If you hand-tuned frequency, bandwidth, or spreading factor, do those three match the local mesh exactly?
Wrong preset still means silence. Antenna and height help only after the radios speak the same language.
What about Meshtastic LongFast / LongTurbo?
Meshtastic is a different firmware ecosystem with its own modem presets. Brazos Valley Mesh does not run Meshtastic as the local stack. A Meshtastic node will not join the Brazos Valley MeshCore network just because both use LoRa on 915 MHz hardware. If you are here for BV Mesh, flash MeshCore and match the USA/Canada preset. We keep Meshtastic comparisons short and only for people migrating hardware over. Day-to-day ops language for this group is MeshCore: companion, repeater, and USA/Canada recommended settings.
How a small-town mesh stays one map
What has worked for us is not a dramatic cutover calendar. We announce the rule plainly—BV Mesh equals MeshCore plus the USA/Canada recommended preset—help newcomers when they flash and see zero nodes by asking firmware, role, and preset first, and treat repeaters as infrastructure rather than a day-one shopping requirement. Ordinary users start with a companion. Add a solar or powered repeater when there is a place to mount it. The decision is already made: there is no switch to another mesh stack unless the group publishes a new official plan. Stick with MeshCore and the USA/Canada recommended preset until then.
Buying boards wherever you like is fine. If you buy through Brazos Valley Mesh, proceeds cycle into the local project so the same preset story stays backed by real coverage instead of wishful maps.
FAQ
Does BV Mesh use Meshtastic?
No. Brazos Valley Mesh runs MeshCore. Flash MeshCore companion or repeater firmware and match the USA/Canada recommended preset.
Will a better antenna fix a wrong preset?
No. Different radio parameters do not interoperate. Antenna and height help range after you match the preset.
Where do I flash firmware?
Use the official MeshCore flasher in a Chromium browser: flasher.meshcore.io. Pick your board, then Companion or Repeater.
Do companions and repeaters use different presets?
They should still match the same USA/Canada recommended radio parameters. The difference is role: companions talk to your phone and do not repeat; repeaters extend the mesh.
Where should I ask for help locally?
Start with Brazos Valley Mesh—site and community channels. Bring your node firmware version, role, and radio preset. Those details solve half of all empty-map problems we see.
Bottom line for Bryan–College Station
Flash MeshCore. Pick the right role. Put a companion in your pocket and a repeater where it can see. Do not let a mismatched radio preset convince you the Brazos Valley has no mesh. Match USA/Canada (Recommended), join the neighbors who are already here, and keep the map one map.