boting ren / Mbed OS BLE_Server_BME280

This is an example to broadcast measured value of BME280 through BLE GATT service.

Dependencies:   BME280

please refer detail information at GitHub. https://github.com/soramame21/BLE_Server_BME280

img/Discovering.md

Committer:
Ren Boting
Date:
2017-08-25
Revision:
4:a937975ebe7e
Parent:
0:f22fa5cc4d56

File content as of revision 4:a937975ebe7e:

## Discoverying BME280 from `nRF Connect`
`nRF Connect` is a free Nordic App can be downloaeded and installed on smartphone.

**Note:** Screens captures depicted below show what is expected from this example if the scanner used is nRF Master Control Panel version 4.9.0. 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.

1. Build and install this application on your board (=mbed device) as explained above.
1. Open the BLE scanner on your phone.
1. Start a scan, then find the device which should be named `BME280`

    ![](./Screenshot_BME280.png)

    **figure 1** Scaning result nRF Master Control Panel 4.9.0

1. Establish a connection with your device.

    ![](./Screenshot_BME280-connect.png)

    **figure 2** How to establish a connection using nRF Master Control Panel 4.9.0

1. Discover the service which has the UUID 0x181A

    ![](./Screenshot_services.png)

    **figure 3** Representation of Environmental Sensing service

1. Discover 3 characteristics of the service.

    Humidity with UUID: 0x2A6F

    Pressure with UUID: 0x2A6D

    Temperature with UUID: 0x2A6E

    ![](./Screenshot_characteristics.png)

    **figure 4** Representation of 3 characteristics

1. Read sensor value

    ![](./Screenshot_readvalue.png)

    **figure 5** How to read a value

    present temperature value

    ![](./Screenshot_temperature.png)

    **figure 6** presentation of temperature value