This application transmits a heart rate value using the Bluetooth SIG Heart Rate Profile. 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. The canonical source for this example lives at https://github.com/ARMmbed/mbed-os-example-ble/tree/master/BLE_HeartRate

BLE Heart Rate Monitor

This application transmits a heart rate value using the Bluetooth SIG Heart Rate Profile. 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.

Technical details are better presented in the mbed Classic equivalent of this example.

Running the application

Requirements

To see the heart rate information on your phone, download Panobike for iOS or Android.

You could also use a generic BLE scanners:

- nRF Master Control Panel for Android.

- LightBlue for iPhone.

Hardware requirements are in the main readme.

Building instructions

Building with mbed-cli

If you'd like to use mbed-cli to build this, then you should refer to the main readme. The instructions here relate to using the developer.mbed.org Online Compiler

In order to build this example in the mbed Online Compiler, first import the example using the ‘Import’ button on the right hand side.

Next, select a platform to build for. This must either be a platform that supports BLE, for example the NRF51-DK, or one of the following:

List of platforms supporting Bluetooth Low Energy

Or you must also add a piece of hardware and the supporting library that includes a Bluetooth Low Energy driver for that hardware, for example the K64F or NUCLEO_F401RE with the X-NUCLEO-IDB05A1

List of components supporting Bluetooth Low Energy.

Once you have selected your platform, compile the example and drag and drop the resulting binary onto your board.

For general instructions on using the mbed Online Compiler, please see the mbed Handbook

Checking for success

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. If you encounter any difficulties consider trying another scanner or another version of nRF Master Control Panel. Alternative scanners may require reference to their manuals.

  • Build the application and install it on your board as explained in the building instructions.
  • Open the BLE scanner on your phone.
  • Start a scan.

/media/uploads/vcoubard/start_scan.png

figure 1 How to start scan using nRF Master Control Panel 4.0.5

  • Find your device; it should be named `HRM`.

/media/uploads/vcoubard/scan_result.png

figure 2 Scan results using nRF Master Control Panel 4.0.5

  • Establish a connection with your device.

/media/uploads/vcoubard/connection.png

figure 3 How to establish a connection using Master Control Panel 4.0.5

  • 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`.

/media/uploads/vcoubard/discovery.png

figure 4 Representation of the Heart Rate service using Master Control Panel 4.0.5

  • Register for the notifications sent by the Heart Rate Measurement characteristic.

/media/uploads/vcoubard/register_to_notifications.png

figure 5 How to register to notifications using Master Control Panel 4.0.5

  • 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.

/media/uploads/vcoubard/notifications.png

figure 6 Notifications view using Master Control Panel 4.0.5

Revisions of mbed-os.lib

Revision Date Message Actions
33:cfa084a7bae3 2017-06-22 Merge pull request #89 from adbridge/master File  Diff  Annotate
31:e606e526e103 2017-06-20 Merge pull request #88 from adbridge/master File  Diff  Annotate
29:dbb485f9d61c 2017-06-08 Merge pull request #82 from adbridge/master File  Diff  Annotate
28:7ad8ad6b0826 2017-05-25 Merge pull request #81 from adbridge/master File  Diff  Annotate
27:a10821e797a8 2017-05-10 Merge pull request #79 from adbridge/master File  Diff  Annotate
25:7bbd3ab29049 2017-05-09 Merge pull request #77 from 0xc0170/master File  Diff  Annotate
24:6576abea8167 2017-04-05 Merge pull request #70 from 0xc0170/master File  Diff  Annotate
21:ec1d136a5a06 2017-03-14 Merge pull request #68 from adbridge/master File  Diff  Annotate
20:28c507b4ef01 2017-03-09 Merge pull request #66 from ARMmbed/oob_test_mbed-os-5.4 File  Diff  Annotate
19:9f8c25c3c996 2017-03-01 Merge pull request #55 from adbridge/master File  Diff  Annotate
17:3ef616130e73 2017-02-15 Merge pull request #52 from 0xc0170/master File  Diff  Annotate
16:711f81ad4785 2017-02-02 Merge pull request #48 from adbridge/master File  Diff  Annotate
15:5f14519a2e39 2017-01-26 Merge pull request #46 from adbridge/master File  Diff  Annotate
14:36f9e84a4b15 2016-12-15 Update mbed-os revision to mbed-os 5.3.0. File  Diff  Annotate
13:924e3381c12b 2016-12-15 Merge pull request #42 from ARMmbed/mbed-os-5.3.0-rc3 File  Diff  Annotate
12:b53f75ead212 2016-10-28 Updating mbed-os to mbed-os-5.2.1 File  Diff  Annotate
11:41c947b801db 2016-10-24 Updating mbed-os to mbed-os-5.2.0 File  Diff  Annotate
10:ac3615194d04 2016-10-24 Merge pull request #32 from ARMmbed/oob File  Diff  Annotate
9:28cc52dc2acd 2016-10-05 Updating mbed-os to mbed-os-5.1.5 File  Diff  Annotate
8:0863e8462ef8 2016-09-16 Updating mbed-os to mbed-os-5.1.4 File  Diff  Annotate
7:401ff3de9bb2 2016-08-20 Updating mbed-os to mbed-os-5.1.2 File  Diff  Annotate
6:706e7eebec70 2016-08-19 Updating mbed-os to mbed-os-5.1.1 File  Diff  Annotate
5:f49beb36116c 2016-08-05 Updating mbed-os to mbed-os-5.1.0 File  Diff  Annotate
3:24f1a7eecc14 2016-08-03 Updating mbed-os to mbed-os-5.1.0-rc5 File  Diff  Annotate
2:9571b22ed03b 2016-07-30 Updating mbed-os to mbed-os-5.1.0-rc4 File  Diff  Annotate
1:72c60abef7e7 2016-07-28 Merge branch 'master' of https://github.com/ARMmbed/mbed-os-example-ble File  Diff  Annotate
0:fb66cae3e9a1 2016-07-26 Update example at tag mbed-os-5.0.1-rc1 File  Diff  Annotate