Fuji Electric NRF51 User Manual page 28

4.4.2 Bluetooth communication function
4.4.2.1 Instructions for use
(1) Bluetooth communication setting should be "ON" by user with Dosimeter Configuration Tool.
(2) When the setting is "ON", NRF51 starts connection with heart rate monitor. After connection
establishment, NRF51 receives the heart beat data from heart rate monitor and sends telemetry data
with selected transmission interval and data format. Data format is according to the setting of Wi-Fi
communication or USB communication.
4.4.2.2 Specification
Communication standard: BLE (Bluetooth4.0)
Heat rate monitor: H7 (Made by POLAR)
4.4.2.3 Icon display
Bluetooth icon
(1) Bluetooth icon flashes: Connection processing in progress or searching for radio waves
(2) Bluetooth icon turns on: Active (connection established)
(3) No icon: OFF
Attention
Please make sure that there is no obstacle such as a metal object between
NRF51 and heart rate monitor in bluetooth communication. If there is the
obstacle, communication may be unstable and sending data may be lost.
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