react-native-cycling-sensors

A RN package for BLE cycling sensors.

Currently only supports:

• Heart Rate
• Cycling Power Measurement
• Cycling Power Vector
• Cycling Speed and Cadence

Tested with Garmin Forerunner 945 (HR broadcast), Garmin HRM Pro for Heart Rate and Tacx Neo 2T and Favero Assioma duo for Power and Cadence measurements.

Installation

npm install react-native-cycling-sensors

Usage

import React, { useEffect } from 'react';
import { Button, SafeAreaView, StyleSheet, Text, View } from 'react-native';
import { BleSensors, PowerMeter } from 'react-native-cycling-sensors';

const App = () => {
  const sleep = (ms: number) => new Promise((r) => setTimeout(r, ms));

  const handleDiscoverPeripheral = (peripheral: any) => {
    console.log(peripheral);
  };

  const handlePowerData = (data: any) => {
    console.log('Power: ', data);
  };

  const handleScanStop = () => {
    console.log('Scanning Stopped');
  };

  const handleButton = () => {
    console.log('button pressed');
  };

  const handleError = (error: Error) => {
    console.log('Got error: ', error);
  };

  useEffect(() => {
    const startBleSensors = async () => {
      const bleSensor = new BleSensors();
      await bleSensor.requestPermissions();
      await bleSensor.start();
      await bleSensor.startSensorDiscovery();
      bleSensor.subscribeToDiscovery(handleDiscoverPeripheral);
      bleSensor.subscribeToDiscoveryStop(handleScanStop);
      await sleep(10000);
      const sensorList = await bleSensor.getDiscoveredSensors();
      console.log(sensorList);
      if (sensorList[0]?.sensorType?.includes('CyclingPower')) {
        console.log(sensorList[0]);
        const pm = new PowerMeter(sensorList[0].id);
        console.log(pm);
        await pm.connect().catch((err) => handleError(err));
        pm.subscribe(handlePowerData);
        await sleep(2000);
        const list = await bleSensor.getConnectedSensors();
        console.log('Connected list: ', list);
        await sleep(5000);
        let sensorLocation = await pm
          .getSensorLocation()
          .catch((err) => handleError(err));
        console.log('Sensor is on: ', sensorLocation);
        await sleep(5000);
        await pm.disconnect().catch((err) => handleError(err));
      }
    };

    startBleSensors(); // run it, run it

    return () => {
      // this now gets called when the component unmounts
    };
  }, []);

  return (
    <SafeAreaView style={styles.container}>
      <View>
        <Text>Testing...</Text>
        <Button title={'Scan Bluetooth'} onPress={handleButton} />
      </View>
    </SafeAreaView>
  );
};

export default App

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT

---

Made with create-react-native-library