General

When is information, HR / steps / calories, stored?
The information is stored when any of the fields, except the timestamp, differ from the previous line.
Wed, 2 May, 2018 at 3:00 PM
Does the device detect sleep and does it detect REM?
The device detects sleep:  sleep_class 0 – awake 1 – light sleep 2 – deep sleep So no REM, but light / deep sleep are seen.
Wed, 2 May, 2018 at 3:03 PM
Which data can be pushed to the device?
The Bluetooth protocol (datasheet section 3.6) does define some write characteristics that can be used to push information to the device. These include but ...
Wed, 2 May, 2018 at 3:07 PM
How is data timestamped?
1. Both, data and reference ECG data, have timestamps associated to each sample. Sampling period is higher than IBI estimation resolution, so the time vecto...
Wed, 10 Oct, 2018 at 1:25 PM
How are HR, accelerometer and RRI data transferred over Bluetooth?
The device transfers HR data through Bluetooth by 3 ways: 1. Real-time HR and RRI data every second using open BLE GATT Heart Rate service 2. Real-t...
Wed, 2 May, 2018 at 3:25 PM
How is proximity detection information available?
The device sends worn status information as part of Activity Data Characteristic of Device Control Service (see datasheet section 3.6.11.7). The worn status...
Tue, 14 Aug, 2018 at 12:38 PM
What is the battery life time warranty for device?
All rechargeable batteries have a limited lifespan and may eventually need to be recycled. Your own battery’s lifespan will vary depending on how you use yo...
Fri, 14 Sep, 2018 at 1:21 PM
How often does the device measure in sampled mode and how to change that?
By default, in sampled mode the HR sampling is turned on every 5 minutes (hr_sampling_interval = 300). This can be changed via the hr_sampling_interval set...
Mon, 24 Sep, 2018 at 9:45 AM
Is it possible to increase the sampling duration of the PPG signal? (from 12 seconds)
Increasing the PPG sampling duration of a sampling period is not possible. The PPG sampling will stop once a reliable HR is found.
Mon, 1 Oct, 2018 at 3:35 PM