Messaging — send/receive messages to contacts and channels
Contacts — track team members, repeaters, and rooms with live telemetry
SAR Markers — drop emoji-coded location pins (person found, fire, staging area) via chat messages
Map — view team positions and markers on OpenStreetMap / topo / satellite; tiles cached for offline use
Location tracking — periodic GPS updates broadcast to the mesh
Packet log — inspect raw BLE frames for debugging

BLE Protocol

MeshCore SAR is powered by the meshcore_client package: github.com/dz0ny/meshcore_client

The client handles BLE connection management, command queueing, and binary frame parsing/building, and is extracted so you can build custom tools, integrations, and apps on top of MeshCore.

Requirements

Flutter 3.19+ / Dart 3.3+
Physical device with Bluetooth (BLE does not work on simulators)
iOS 13+ or Android SDK 21+

Build

flutter pub get
flutter run                        # debug
flutter build apk --release        # Android
flutter build ios --release        # iOS

GitHub Actions artifacts

Every push runs the Build And Upload Release Assets workflow and uploads build artifacts for:

Android (.apk)
Linux (.tar.gz)
macOS (.dmg)
Windows (.zip)

How to download them:

Open the repository on GitHub.
Go to Actions.
Open a workflow run named Build And Upload Release Assets.
In the run summary, scroll to Artifacts.
Download the artifact you need (release-android, release-linux, release-macos, release-windows).

For published releases, the same files are also attached to the GitHub Release page.

iOS signing

open ios/Runner.xcworkspace
# Select team in Signing & Capabilities, then run from Xcode

Clean rebuild

flutter clean && flutter pub get
cd ios && pod deintegrate && pod install && cd ..

Permissions

Platform	Permissions
iOS	Bluetooth, Location (when in use)
Android	`BLUETOOTH_SCAN`, `BLUETOOTH_CONNECT`, `ACCESS_FINE_LOCATION`, `INTERNET`

SAR Marker format

S:<emoji>:<lat>,<lon>

Examples: S:🧑:46.0569,14.5058 · S:🔥:46.057,14.506 · S:🏕️:46.0571,14.506

Architecture

lib/
├── models/       — data types (re-exported from meshcore_client)
├── providers/    — state management (Provider pattern)
├── screens/      — top-level pages
├── services/     — location tracking, SSE bridge, tile cache
└── widgets/      — reusable UI components