hearRate&PedometerStats.js

handleUpdateValueForCharacteristic(data) {
    //let dataBuffer = Buffer.Buffer.from(data);
    console.log(
      'Received data from ' +
        data.peripheral +
        ' characteristic ' +
        data.characteristic,
      data.value[1],
    );
    console.log(data.characteristic,UUID_BASE_2('2a37'))
    console.log(_.isEqual(data.characteristic,UUID_BASE_2('2a37')));
      let val = data.characteristic;
    
      if( _.isEqual(val, UUID_BASE('0007'))) {
        let res = Buffer.Buffer.from(data.value);
        //console.log('Heart rate : ' + res.readUInt16BE(0));
        console.log('Read !! Steps Count:', res.readUInt16LE(1));
        this.setState({steps: res.readUInt16LE(1)});
        if (res.length >= 8) {
          console.log('Read !! Distance:', res.readUInt32LE(5));
          this.setState({distance: res.readUInt32LE(5)});
        }
        if (res.length >= 12) {
          console.log('Read !! Calories:', res.readUInt32LE(9));
          this.setState({calory: res.readUInt32LE(9)});
        }
      }else if( _.isEqual(val,UUID_BASE_2('2a37'))) {
        let res = Buffer.Buffer.from(data.value);
        this.setState({heartbeat: data.value[1]});
        console.log('Heart rate : ' + data.value[1]);
      }
      
      this.persist(this.state.peripheral);
    
  }

....

handlePedometerStats(peripheral) {
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id)
        .then(() => {
          BleManager.startNotification(peripheral.id, 'fee0', UUID_BASE('0007'))
            .then(() => {
              console.log(
                'Notification started for Services of Pedometer stats',
              );
            })
            .catch(error => {
              console.log('Read Steps Error', error);
            });
        })
        .catch(error => {
          console.log('Error ', error);
        });
    }, 6000);
  }

...

getHeartRate(peripheral) {
    setTimeout(() => {
      BleManager.retrieveServices(peripheral.id).then(() => {
        BleManager.startNotification(peripheral.id, '180d', '2a37') //Starts heartBeat data fetching from miband device.
          .then(() => {
            console.log('Heart Rate notification started');
          });
      });
    }, 7000);
  }