Suad Suljic / Mbed OS Seismo2

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Dependencies:   SDFileSystem circular_buffer MPU6050 SoftSerial

readme.md@6:75ed671f455e, 2018-11-22 (annotated)

Committer:
suads
Date:
Thu Nov 22 17:50:31 2018 +0000
Revision:
6:75ed671f455e
Parent:
0:a4de55cab4e2 
seismo;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
OsmanKameric 0:a4de55cab4e2 1 This example creates and updates a standard Battery Level service containing a single
OsmanKameric 0:a4de55cab4e2 2 GATT characteristic.
OsmanKameric 0:a4de55cab4e2 3
OsmanKameric 0:a4de55cab4e2 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.
OsmanKameric 0:a4de55cab4e2 5
OsmanKameric 0:a4de55cab4e2 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.
OsmanKameric 0:a4de55cab4e2 7
OsmanKameric 0:a4de55cab4e2 8 # Running the application
OsmanKameric 0:a4de55cab4e2 9
OsmanKameric 0:a4de55cab4e2 10 ## Requirements
OsmanKameric 0:a4de55cab4e2 11
OsmanKameric 0:a4de55cab4e2 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 :
OsmanKameric 0:a4de55cab4e2 13
OsmanKameric 0:a4de55cab4e2 14 - [nRF Master Control Panel](https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp) for Android.
OsmanKameric 0:a4de55cab4e2 15
OsmanKameric 0:a4de55cab4e2 16 - [LightBlue](https://itunes.apple.com/gb/app/lightblue-bluetooth-low-energy/id557428110?mt=8) for iPhone.
OsmanKameric 0:a4de55cab4e2 17
OsmanKameric 0:a4de55cab4e2 18 Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
OsmanKameric 0:a4de55cab4e2 19
OsmanKameric 0:a4de55cab4e2 20 ## Building instructions
OsmanKameric 0:a4de55cab4e2 21
OsmanKameric 0:a4de55cab4e2 22 Building instructions for all samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
OsmanKameric 0:a4de55cab4e2 23
OsmanKameric 0:a4de55cab4e2 24 ## Checking for success
OsmanKameric 0:a4de55cab4e2 25
OsmanKameric 0:a4de55cab4e2 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.
OsmanKameric 0:a4de55cab4e2 27
OsmanKameric 0:a4de55cab4e2 28 1. Build the application and install it on your board as explained in the building instructions.
OsmanKameric 0:a4de55cab4e2 29 1. Open the BLE scanner on your phone.
OsmanKameric 0:a4de55cab4e2 30 1. Start a scan.
OsmanKameric 0:a4de55cab4e2 31
OsmanKameric 0:a4de55cab4e2 32 ![](img/start_scan.png)
OsmanKameric 0:a4de55cab4e2 33
OsmanKameric 0:a4de55cab4e2 34 **figure 1** How to start scan using nRF Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 35
OsmanKameric 0:a4de55cab4e2 36 1. Find your device; it should be named `BATTERY`.
OsmanKameric 0:a4de55cab4e2 37
OsmanKameric 0:a4de55cab4e2 38 ![](img/scan_result.png)
OsmanKameric 0:a4de55cab4e2 39
OsmanKameric 0:a4de55cab4e2 40 **figure 2** Scan results using nRF Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 41
OsmanKameric 0:a4de55cab4e2 42 1. Establish a connection with your device.
OsmanKameric 0:a4de55cab4e2 43
OsmanKameric 0:a4de55cab4e2 44 ![](img/connection.png)
OsmanKameric 0:a4de55cab4e2 45
OsmanKameric 0:a4de55cab4e2 46 **figure 3** How to establish a connection using Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 47
OsmanKameric 0:a4de55cab4e2 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.
OsmanKameric 0:a4de55cab4e2 49
OsmanKameric 0:a4de55cab4e2 50 ![](img/discovery.png)
OsmanKameric 0:a4de55cab4e2 51
OsmanKameric 0:a4de55cab4e2 52 **figure 4** Representation of the Battery service using Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 53
OsmanKameric 0:a4de55cab4e2 54 1. Register for the notifications sent by the *Battery level* characteristic.
OsmanKameric 0:a4de55cab4e2 55
OsmanKameric 0:a4de55cab4e2 56 ![](img/register_to_notifications.png)
OsmanKameric 0:a4de55cab4e2 57
OsmanKameric 0:a4de55cab4e2 58 **figure 5** How to register to notifications using Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 59
OsmanKameric 0:a4de55cab4e2 60
OsmanKameric 0:a4de55cab4e2 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.
OsmanKameric 0:a4de55cab4e2 62
OsmanKameric 0:a4de55cab4e2 63 ![](img/notifications.png)
OsmanKameric 0:a4de55cab4e2 64
OsmanKameric 0:a4de55cab4e2 65 **figure 6** Notifications view using Master Control Panel 4.0.5
OsmanKameric 0:a4de55cab4e2 66
OsmanKameric 0:a4de55cab4e2 67 If you can see the characteristic, and if its value is incrementing correctly, the application is working properly.
OsmanKameric 0:a4de55cab4e2 68