UM1870 datasheet(46/58 Pages) STMICROELECTRONICS

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BLE remote control demo application

UM1870

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DocID027602 Rev 1

BLE remote control demo application

This demo application shows how to control a remote device (like an actuator) using a

BlueNRG-MS device.This application periodically sends broadcast data (temperature

values) that can be read by any device. The broadcast data is encapsulated in a

manufacturer-specific AD type. The data content (besides the manufacturer ID, i.e. 0x0030

for STMicroelectronics) is as follows:

The temperature value is given in tenths of degrees Celsius.

The device is also connectable and exposes a characteristic used to control the LEDs on

the BlueNRG-MS platform. The value of this characteristic is a bitmap of 1 byte. Each bit

controls one of the LEDs:

• bit 0 is the status of LED 1

• bit 1 is the status of LED 2.

• bit 2 is the status of LED 3.

• bit 3 is the status of LED 4.

• bit 4 is the status of LED 5.

As a consequence, a remote device can connect and write this byte to change or read the

status of these LEDs (1 for LED ON, 0 for LED OFF).

The peripheral disconnects after a timeout (DISCONNECT_TIMEOUT), to prevent that a

central is always connected to the device.

By default, no security is used, but it can be enabled with ENABLE_SECURITY (refer to file

BLE_RC_main.h). When security is enabled the central has to be authenticated before

reading or writing the device characteristic.

In order to interact with a BlueNRG-MS device configured as a BLE Remote control, another

BLE device (a BlueNRG-MS or any SMART READY device) can be used to scan and see

broadcast data.

To control one of the LEDs, the device has to connect to a BlueNRG-MS BLE Remote

Control device and write into the exposed control point characteristic. The Service UUID is

ed0ef62e-9b0d-11e4-89d3-123b93f75cba. The control point characteristic UUID is

ed0efb1a-9b0d-11e4-89d3-123b93f75cba.

8.1

Supported platforms

The BlueNRG-MS BLE Remote Control is supported on the BlueNRG-MS development

platform (STEVAL-IDB005V1).

Table 12. BLE remote advertising data

Byte 0

Byte 1

Byte2

App ID (0x05)

Temperature value (little-endian)

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