battery&deviceInfo.js

handleBattery(peripheral) {
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id).then(services => {
        BleManager.read(peripheral.id, 'fee0', UUID_BASE('0006'))
          .then(readData => {
            let data = Buffer.Buffer.from(readData);
            console.log('read battery level', data.readUInt8(1, true));
            this.setState({battery: data.readUInt8(1, true)});
          })
          .catch(error => {
            console.log('error', error);
          });
      });
    }, 1000);
  }
  
  handleDeviceInfo(peripheral) {
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id).then(services => {
        BleManager.read(peripheral.id, '180a', '2a28')
          .then(readData => {
            let data = Buffer.Buffer.from(readData);
            console.log('Read !! Firmware Version : ', data.toString());
            this.setState({fVersion: data.toString()});
          })
          .catch(error => {
            console.log('error', error);
          });
      });
    }, 2000);
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id).then(services => {
        BleManager.read(peripheral.id, '180a', '2a25')
          .then(readData => {
            let data = Buffer.Buffer.from(readData);
            console.log('Read !! Serial Number :', data.toString());
            this.setState({Snumber: data.toString()});
          })
          .catch(error => {
            console.log('error', error);
          });
      });
    }, 3000);
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id).then(services => {
        BleManager.read(peripheral.id, 'fee0', '2a2b')
          .then(readData => {
            let data = Buffer.Buffer.from(readData);
            console.log('Read !! Time info :', parseDate(data).toString());
            this.setState({time: parseDate(data).toString()});
          })
          .catch(error => {
            console.log('error', error);
          });
      });
    }, 4000);
  }