NXP Semiconductors KW40, Руководство пользователя

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Loading firmware
KW40 Heart Rate Monitor Using Bluetooth Low Energy, User's Guide, Rev. 0, 10/2015
8 Freescale Semiconductor, Inc.
After the battery is fully charged, the red LED will remain on to indicate that the battery charger can be
disconnected.
5. User Interface Description
In the BLE Heart Rate Monitor, the user interface is composed of two LEDs and one push button.
Functionality for each element is described below.
5.1. Red LED
Table 1 shows the possible indications for the red LED and its meaning.
Table 1. Red LED indications
LED Status Indicated action
LED off No action
LED fade Battery charging
LED on Battery fully charged
LED flash Heartbeat detected
5.2. Green LED
Table 2 shows the possible indications for the green LED and its meaning.
Table 2. Green LED indications
LED Status Indicated Action
LED off No action
LED blink Device advertising
LED fade Device connected
5.3. Application Button
Table 3 shows the action performed by the application button depending on the actual state.
Table 3. Application button actions
Device state Action performed
Battery Retention State Enter Advertising state
Advertising State Enter Battery Retention State
Connected Enter Battery Retention State
Charging None
6. Loading firmware
If a firmware update is required, a new version can be downloaded using a J-link programmer. This
chapter explains the firmware download process for the device.