Ciaran Doyle / Mbed OS BlueCrutch

Combines a working system to save force, acceleration and gyro data to an SD card in a MAX32630 with BLE_Heartrate taken from the mbed site.

Dependencies:   USBMSD_BD BMI160 HX711 max32630fthr USBDevice

readme.md@83:b67e4bb6a087, 2020-06-04 (annotated)

Committer:
qaz
Date:
Thu Jun 04 10:32:19 2020 +0000
Revision:
83:b67e4bb6a087
Parent:
81:b8ef2a762318 
Publishing

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 1:72c60abef7e7 1 # BLE Heart Rate Monitor
mbed_official 1:72c60abef7e7 2
qaz 81:b8ef2a762318 3 This application transmits a heart rate value using the [Bluetooth SIG Heart Rate Profile]
qaz 81:b8ef2a762318 4 (https://developer.bluetooth.org/TechnologyOverview/Pages/HRP.aspx). [Ciaran: dead link! 24/10/19]
qaz 81:b8ef2a762318 5 The heart rate value is provided by the application itself, not by a sensor, so that you don't have to get a sensor just to run the example.
mbed_official 1:72c60abef7e7 6
qaz 81:b8ef2a762318 7 Technical details are better presented [in the mbed Classic equivalent of this example] [and almost impossible to relate to this version - Ciaran]
qaz 81:b8ef2a762318 8 (https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_HeartRate/). [Ciaran: that wouldn't compile for me 23/10/19]
mbed_official 1:72c60abef7e7 9
mbed_official 1:72c60abef7e7 10 # Running the application
mbed_official 1:72c60abef7e7 11 ## Requirements
qaz 80:caccea4da07b 12 To see the heart rate information on your phone, use a BLE scanner:
mbed_official 1:72c60abef7e7 13 - [nRF Master Control Panel](https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp) for Android.
mbed_official 1:72c60abef7e7 14 - [LightBlue](https://itunes.apple.com/gb/app/lightblue-bluetooth-low-energy/id557428110?mt=8) for iPhone.
mbed_official 1:72c60abef7e7 15
mbed_official 1:72c60abef7e7 16 Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
mbed_official 1:72c60abef7e7 17
mbed_official 1:72c60abef7e7 18 ## Building instructions
mbed_official 1:72c60abef7e7 19
mbed_official 1:72c60abef7e7 20 Building instructions for all samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
mbed_official 1:72c60abef7e7 21
mbed_official 1:72c60abef7e7 22 ## Checking for success
mbed_official 1:72c60abef7e7 23
qaz 81:b8ef2a762318 24 **Note:** Screens captures depicted below show what is expected from this example if the scanner used is *nRF Master Control Panel* version 4.0.5.
qaz 81:b8ef2a762318 25 If you encounter any difficulties consider trying another scanner or another version of nRF Master Control Panel.
qaz 81:b8ef2a762318 26 Alternative scanners may require reference to their manuals.
mbed_official 1:72c60abef7e7 27
mbed_official 1:72c60abef7e7 28 1. Build the application and install it on your board as explained in the building instructions.
mbed_official 1:72c60abef7e7 29 1. Open the BLE scanner on your phone.
mbed_official 1:72c60abef7e7 30 1. Start a scan.
mbed_official 1:72c60abef7e7 31
mbed_official 1:72c60abef7e7 32 ![](img/start_scan.png)
mbed_official 1:72c60abef7e7 33
qaz 80:caccea4da07b 34 **figure 1** How to start scan using nRF Master Control Panel 4.0.5
mbed_official 1:72c60abef7e7 35
mbed_official 1:72c60abef7e7 36 1. Find your device; it should be named `HRM`.
mbed_official 1:72c60abef7e7 37
mbed_official 1:72c60abef7e7 38 ![](img/scan_result.png)
mbed_official 1:72c60abef7e7 39
qaz 80:caccea4da07b 40 **figure 2** Scan results using nRF Master Control Panel 4.0.5
mbed_official 1:72c60abef7e7 41
mbed_official 1:72c60abef7e7 42 1. Establish a connection with your device.
mbed_official 1:72c60abef7e7 43
mbed_official 1:72c60abef7e7 44 ![](img/connection.png)
mbed_official 1:72c60abef7e7 45
qaz 80:caccea4da07b 46 **figure 3** How to establish a connection using Master Control Panel 4.0.5
mbed_official 1:72c60abef7e7 47
mbed_official 1:72c60abef7e7 48 1. Discover the services and the characteristics on the device. The *Heart Rate* service has the UUID `0x180D` and includes the *Heart Rate Measurement* characteristic which has the UUID `0x2A37`.
mbed_official 1:72c60abef7e7 49
mbed_official 1:72c60abef7e7 50 ![](img/discovery.png)
mbed_official 1:72c60abef7e7 51
qaz 80:caccea4da07b 52 **figure 4** Representation of the Heart Rate service using Master Control Panel 4.0.5
mbed_official 1:72c60abef7e7 53
mbed_official 1:72c60abef7e7 54 1. Register for the notifications sent by the *Heart Rate Measurement* characteristic.
mbed_official 1:72c60abef7e7 55
mbed_official 1:72c60abef7e7 56 ![](img/register_to_notifications.png)
mbed_official 1:72c60abef7e7 57
qaz 80:caccea4da07b 58 **figure 5** How to register to notifications using Master Control Panel 4.0.5
mbed_official 1:72c60abef7e7 59
mbed_official 1:72c60abef7e7 60
qaz 80:caccea4da07b 61 1. You should see the heart rate value change every half second. It begins at 100, goes up to 175 (in steps of 1), resets to 100 and so on.
mbed_official 1:72c60abef7e7 62
mbed_official 1:72c60abef7e7 63 ![](img/notifications.png)
mbed_official 1:72c60abef7e7 64
qaz 81:b8ef2a762318 65 **figure 6** Notifications view using Master Control Panel 4.0.5