Nora Vazbyte / Mbed OS 99Problems-BLEAint1

app critics will say it's money, cash, toes

readme.md@0:07212de2fec1, 2018-10-28 (annotated)

Committer:
vazbyte
Date:
Sun Oct 28 12:36:21 2018 +0000
Revision:
0:07212de2fec1
started from BLE now the whole team -- here

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vazbyte 0:07212de2fec1 1 This example creates and updates a standard Battery Level service containing a single
vazbyte 0:07212de2fec1 2 GATT characteristic.
vazbyte 0:07212de2fec1 3
vazbyte 0:07212de2fec1 4 The [battery service transmits](https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.battery_service.xml) a device's battery level in percentage, with 100% being a fully charged battery and 0% being a fully drained battery.
vazbyte 0:07212de2fec1 5
vazbyte 0:07212de2fec1 6 Although the sample application runs on a BLE device, it doesn't show the device's real battery level (because that changes very slowly and will make for a dull example). Instead, it transmits a fake battery level that starts at 50% (half charged). Every half second, it increments the battery level, going in single increments until reaching 100% (as if the battery is charging). It then drops down to 20% to start incrementing again.
vazbyte 0:07212de2fec1 7
vazbyte 0:07212de2fec1 8 # Running the application
vazbyte 0:07212de2fec1 9
vazbyte 0:07212de2fec1 10 ## Requirements
vazbyte 0:07212de2fec1 11
vazbyte 0:07212de2fec1 12 The sample application can be seen on any BLE scanner on a smartphone. If you don't have a scanner on your phone, please install :
vazbyte 0:07212de2fec1 13
vazbyte 0:07212de2fec1 14 - [nRF Master Control Panel](https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp) for Android.
vazbyte 0:07212de2fec1 15
vazbyte 0:07212de2fec1 16 - [LightBlue](https://itunes.apple.com/gb/app/lightblue-bluetooth-low-energy/id557428110?mt=8) for iPhone.
vazbyte 0:07212de2fec1 17
vazbyte 0:07212de2fec1 18 Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
vazbyte 0:07212de2fec1 19
vazbyte 0:07212de2fec1 20 ## Building instructions
vazbyte 0:07212de2fec1 21
vazbyte 0:07212de2fec1 22 Building instructions for all samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
vazbyte 0:07212de2fec1 23
vazbyte 0:07212de2fec1 24 ## Checking for success
vazbyte 0:07212de2fec1 25
vazbyte 0:07212de2fec1 26 **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.
vazbyte 0:07212de2fec1 27
vazbyte 0:07212de2fec1 28 1. Build the application and install it on your board as explained in the building instructions.
vazbyte 0:07212de2fec1 29 1. Open the BLE scanner on your phone.
vazbyte 0:07212de2fec1 30 1. Start a scan.
vazbyte 0:07212de2fec1 31
vazbyte 0:07212de2fec1 32 ![](img/start_scan.png)
vazbyte 0:07212de2fec1 33
vazbyte 0:07212de2fec1 34 **figure 1** How to start scan using nRF Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 35
vazbyte 0:07212de2fec1 36 1. Find your device; it should be named `BATTERY`.
vazbyte 0:07212de2fec1 37
vazbyte 0:07212de2fec1 38 ![](img/scan_result.png)
vazbyte 0:07212de2fec1 39
vazbyte 0:07212de2fec1 40 **figure 2** Scan results using nRF Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 41
vazbyte 0:07212de2fec1 42 1. Establish a connection with your device.
vazbyte 0:07212de2fec1 43
vazbyte 0:07212de2fec1 44 ![](img/connection.png)
vazbyte 0:07212de2fec1 45
vazbyte 0:07212de2fec1 46 **figure 3** How to establish a connection using Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 47
vazbyte 0:07212de2fec1 48 1. Discover the services and the characteristics on the device. The *Battery service* has the UUID 0x180F and includes the *Battery level* characteristic which has the UUID 0x2A19.
vazbyte 0:07212de2fec1 49
vazbyte 0:07212de2fec1 50 ![](img/discovery.png)
vazbyte 0:07212de2fec1 51
vazbyte 0:07212de2fec1 52 **figure 4** Representation of the Battery service using Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 53
vazbyte 0:07212de2fec1 54 1. Register for the notifications sent by the *Battery level* characteristic.
vazbyte 0:07212de2fec1 55
vazbyte 0:07212de2fec1 56 ![](img/register_to_notifications.png)
vazbyte 0:07212de2fec1 57
vazbyte 0:07212de2fec1 58 **figure 5** How to register to notifications using Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 59
vazbyte 0:07212de2fec1 60
vazbyte 0:07212de2fec1 61 1. You should see the battery level value change every half second. It begins at 50, goes up to 100 (in steps of 1), resets to 20 and so on.
vazbyte 0:07212de2fec1 62
vazbyte 0:07212de2fec1 63 ![](img/notifications.png)
vazbyte 0:07212de2fec1 64
vazbyte 0:07212de2fec1 65 **figure 6** Notifications view using Master Control Panel 4.0.5
vazbyte 0:07212de2fec1 66
vazbyte 0:07212de2fec1 67 If you can see the characteristic, and if its value is incrementing correctly, the application is working properly.
vazbyte 0:07212de2fec1 68