Guam · Marianas · Pacific
Mesh active

The mesh is
always on

Nodes come and go — a solar node on a roof, a tracker on a fishing boat, a kit at someone’s desk. Together they form something that belongs to no one and serves everyone. Add yours and become part of it.

15km
Line-of-sight range per hop
$0/mo
Cost to use the mesh
915MHz
ISM band — no license needed
What it is

A community radio network for Guam

Meshtastic is open-source LoRa mesh radio — cheap devices that relay messages and GPS positions across long distances without internet or cell infrastructure. Mesh671 is Guam’s local deployment, run by the community, for the community.

📡
Mesh networking
Every node is also a relay. Messages hop node to node until they arrive — the more nodes, the stronger the network.
📍
GPS tracking
Share location on a private map with friends or family. Great for boating, hiking Guam’s trails, or keeping tabs on your group.
🔒
Private channels
Set up a channel with a passphrase for your household or crew. AES-128 encrypted. Public Mesh671 channel open island-wide.
Low power
A USB power bank keeps a node running for days. A small solar panel keeps it alive indefinitely.
📻
Ham radio friendly
915 MHz ISM band — no license to participate. Licensed hams can run higher-power backbone nodes.
🌏
Works when it counts
Cell networks go down in typhoons. This doesn’t — nothing central to fail. Good to have when it matters.
Get on the mesh

Three steps to your first node

Works on iPhone or Android. DIY kits need a laptop for the initial flash — after that everything runs from your phone.

01
Get a node and power it up
Any Meshtastic-compatible hardware works. For DIY kits, open the web flasher in Chrome or Edge and flash the firmware — about 5 minutes. Ready-to-go devices just need power.
flasher.meshtastic.org
02
Install the app and pair your node
Download Meshtastic on iOS or Android. Tap + and pair over Bluetooth. Give your node a name — callsign, handle, whatever you want others to see.
iOS App StoreGoogle Play
03
Set your region and join Mesh671
Radio Config → LoRa → Region: US_915. Then Channels → add Mesh671. You’re on the island mesh.
Region: US_915Channel: Mesh671
+
Want a private channel?
Add a channel with a name and passphrase you share with your group. Encrypted end-to-end. Share as a QR code for easy setup.
Internet bridge

Connect beyond radio range with MQTT

MQTT lets a Wi-Fi or phone-connected node bridge your local LoRa mesh to the internet, connecting nodes across Guam or the Pacific that can’t hear each other over radio.

01
You need a gateway node or your phone
ESP32 nodes (T-Beam, Heltec) can connect directly to Wi-Fi. nRF52840 kits use your phone as a proxy — enable Client Proxy in MQTT settings.
02
Enable MQTT and configure the broker
Module Config → MQTT → toggle on. Use these settings:
MQTT · BROKER Server mqtt.meshtastic.org Username meshdev Password large4cats Root topic msh/GU Encryption Enabled TLS Enabled Map reporting On Uplink: on Downlink: on msh/GU groups Guam traffic. msh/US connects to mainland too.
03
Enable uplink and downlink on your channel
Channels → Mesh671 or LongFast → enable Uplink and Downlink. Save and reboot.
Uplink: onDownlink: on
!
A note on encryption over MQTT
With Encryption enabled, your channel’s key is preserved over MQTT. The default LongFast channel uses a publicly known key — treat it as open. For private comms use a channel with your own PSK. Position data via Map Reporting is always unencrypted.
Get started

Find your node

All links use the Mesh671 affiliate code — a small commission comes back to fund permanent island nodes at no extra cost to you.

Best to start
SenseCAP T1000-E
Credit-card sized, GPS built in, ready out of the box. Drop it in your bag, your car, or your kid’s backpack. No soldering, no setup beyond pairing.
~$30 — 10% off with code below
GD4CW452
Check it out →
Workshop kit
XIAO nRF52840 + Wio-SX1262
The kit we build at Guam ARC workshops. Tiny, low power, fully open. Flash it in your browser in 5 minutes. Great if you want to understand how it works.
~$20 — 2% off with code below
9WPZ3S45
Check it out →
Solar node
Seeed Solar Node P1
Mount on your roof, point south, forget about it. What the Mesh671 backbone nodes run. Weatherproof, solar powered, extends coverage indefinitely.
~$60 — 5% off with code below
JAS5HXKB
Check it out →
Boat / vehicle
Wio Tracker L1 Pro
Better GPS for moving targets — boats, vehicles crossing in and out of mesh coverage. Syncs position whenever it’s in range.
~$45 — 8% off with code below
5BJB7IIW
Check it out →

Use the coupon codes above at checkout for a discount — Mesh671 earns a small commission on each sale which goes towards hosting this site. Prices approximate.

Community

The mesh grows when you join it

No company owns Mesh671. No one can shut it down. Every node someone puts up strengthens something that will outlast any individual piece of hardware. The network itself belongs to everyone on the island.

Guam Amateur Radio Club
Monthly meetings with hands-on node help, demos, and community. Beginners welcome — no license required to participate in the mesh.
Get in touch →
Put a node on your roof
High ground is gold — Nimitz Hill, Barrigada Heights, anywhere with line of sight. A solar P1 costs about $60 and runs forever. Reach out and we’ll help you place it well.
Talk to us about placement →
See the mesh live
Enable Map Reporting in MQTT and your node shows up on Meshtastic’s public map automatically. Good way to check coverage before heading somewhere remote.
Open the public map →