Stress measuring

[Ebrahima]

Hi

How can I measure stress because Fitbit does not provides skin conductance level (SCL) ? Can I get heart rate variety?

What kind of data of accelerometer sensor? Thank you

[JonFitbit]

Unfortunately we don't expose HRV. Accelerometer data is available (x,z,y) - https://dev.fitbit.com/build/reference/device-api/accelerometer/

[YannisParis]

For dream detection I calculated Hrv with this method :

for one minute , get heartbeat per minute 

take max and min of these value, and output the difference

the result is pretty accurate if frequency is good.

[YannisParis]

with minhr and maxhr declared globally and reset after each variability calculation : 

var hrm = new HeartRateSensor({ frequency: 1, batch: 1 });

// Declare an event handler that will be called every time a new HR value is received.
hrm.addEventListener("reading", () => {
  // Peek the current sensor values - first of batch, ignore the others

  //console.log("Current heart rate: " + hrm.heartRate);
  hrLabel.text = hrm.heartRate;
  lastValueTimestamp = Date.now();
  if (maxhr < hrm.heartRate) {
    maxhr = hrm.heartRate;
  }
  if (minhr > hrm.heartRate) {
    minhr = hrm.heartRate;
  }
});

[Ebrahima]

Thank you YannisParis. Can I access data every minute? How can I know If current heart rate in rest situation or not ?what do frequency and batch parameters meaning? Thank you so much 🙂

[Gondwana]

https://dev.fitbit.com/build/guides/sensors/heart-rate/

https://dev.fitbit.com/build/reference/device-api/heart-rate/