在带有React Native的设备之间使用BLE

npm install --save react-native-ble-plx

npx react-native link react-native-ble-plx

android {
  ...
  defaultConfig {
    ...
    permissions {
      android.permission.BLUETOOTH
      android.permission.BLUETOOTH_ADMIN
      android.permission.ACCESS_FINE_LOCATION
      android.permission.ACCESS_COARSE_LOCATION
    }
  }
}

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

import { BleManager } from 'react-native-ble-plx';

const manager = new BleManager();

manager.startDeviceScan(null, null, (error, device) => {
  if (error) {
    console.log(error);
    return;
  }

  if (device.name === 'YourDeviceName' || device.id === 'YourDeviceId') {
    manager.stopDeviceScan();
    console.log('Device found:', device.id);
    // 连接到设备
    device.connect()
      .then((device) => {
        console.log('Device connected:', device.id);
        // 发现服务和特征
        return device.discoverAllServicesAndCharacteristics();
      })
      .then((device) => {
        console.log('Services and characteristics discovered:', device.id);
        // 进行读写操作
      })
      .catch((error) => {
        console.log(error);
      });
  }
});

device.connect()
  .then((device) => {
    console.log('Device connected:', device.id);
    return device.discoverAllServicesAndCharacteristics();
  })
  .then((device) => {
    console.log('Services and characteristics discovered:', device.id);
    // 进行读写操作
  })
  .catch((error) => {
    console.log(error);
  });

const serviceUUID = 'YourServiceUUID';
const characteristicUUID = 'YourCharacteristicUUID';

device.readCharacteristicForService(serviceUUID, characteristicUUID)
  .then((characteristic) => {
    console.log('Characteristic value:', characteristic.value);
  })
  .catch((error) => {
    console.log(error);
  });

device.writeCharacteristicWithResponseForService(serviceUUID, characteristicUUID, new Buffer([0x01, 0x02, 0x03]))
  .then(() => {
    console.log('Characteristic written successfully');
  })
  .catch((error) => {
    console.log(error);
  });

import { PermissionsAndroid } from 'react-native';

async function requestPermissions() {
  try {
    const granted = await PermissionsAndroid.requestMultiple([
      PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
      PermissionsAndroid.PERMISSIONS.ACCESS_COARSE_LOCATION,
    ]);
    if (
      granted['android.permission.ACCESS_FINE_LOCATION'] === PermissionsAndroid.RESULTS.GRANTED &&
      granted['android.permission.ACCESS_COARSE_LOCATION'] === PermissionsAndroid.RESULTS.GRANTED
    ) {
      console.log('Location permissions granted');
    } else {
      console.log('Location permissions denied');
    }
  } catch (err) {
    console.warn(err);
  }
}

requestPermissions();