React Native example

An Expo app for iOS and Android. It demonstrates a full training-style flow: pick a device, connect over BLE, and run training modes (peak force, endurance, timed hangs). The example is based on CraneGrip, and uses react-native-ble-plx.

Source

examples/react-native

Stack

• Expo
• React Native
• react-native-ble-plx

Usage

The example is a tabbed app with:

• Home: Choose a training mode. Each uses a scale/force device (e.g. CTS500, Progressor, Force Board, Frez Dyno, WH-C06) and the shared device interface (connect, notify, stream).
• Device picker: Select device type (WH-C06, Climbro, CTS500, Entralpi, Force Board, Frez Dyno, Motherboard, mySmartBoard, Progressor). The app creates the matching device class, scans, connects, and streams force data.
• History & settings: Persist workout results and configure holds/units.

Use it as a reference for:

• Installing and configuring the React Native package and BLE library
• Scanning and connecting from React Native (permissions, BleManager, device creation)
• Integrating with React state and UI (connection status, streamed values, modals)
• Running the same device logic on iOS and Android

Use a physical iOS or Android device with an Expo development build. Expo Go and device simulators cannot provide the native Bluetooth connection required by this example.

Run

From the repo root:

npm install
cp examples/react-native/.env.example examples/react-native/.env.local
# Add EXPO_PUBLIC_FREZ_ACCESS_KEY to .env.local when using Frez Dyno.
npm run dev:examples:react-native

Expo loads EXPO_PUBLIC_FREZ_ACCESS_KEY automatically. Public variables are included in the compiled application, so use a personal key only for local development and do not distribute that build.

Then run the development build on a physical iOS or Android device. See Platforms: React Native for native BLE setup.