UM2071 datasheet(32/56 Pages) STMICROELECTRONICS

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BlueNRG-1 remote control demo application

UM2071

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DocID029370 Rev 3

BlueNRG-1 remote control demo application

The BlueNRG-1 BLE remote control application is supported on the BlueNRG-1

development platform (STEVAL-IDB007V1). It demonstrates how to control a remote

device (like an actuator) using a BlueNRG-1 device.

This application periodically broadcasts temperature values that can be read by any device.

The data is encapsulated in a manufacturer-specific AD type and the content (besides the

manufacturer ID, i.e., 0x0030 for STMicroelectronics) is as follows:

Table 7: BLE remote advertising data

Byte 0

Byte 1

Byte2

App ID (0x05)

Temperature value (little-endian)

The temperature value is given in tenths of degrees Celsius.

The device is also connectable and exposes a characteristic used to control LEDs DL1,

DL2 and DL3 on the BlueNRG-1 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 DL1



bit 1 is the status of LED DL2



bit 2 is the status of LED DL3.

A remote device can therefore 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 a central

device remaining connected to the device indefinitely.

Security is not enabled by default, but this can be changed with ENABLE_SECURITY (refer

to file BLE_RC_main.h). When security is enabled, the central device must be

authenticated before reading or writing the device characteristic.

To interact with a device configured as a BlueNRG-1 BLE remote control, another BLE

device (a BlueNRG-1 or any Bluetooth® smart ready device) can be used to detect and

view broadcast data.

To control one of the LEDs, the device has to connect to a BlueNRG-1 BLE remote control

device and write in 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.

9.1

BLE remote control application setup

This section describes how to configure a BlueNRG-1 device to acting as a remote control

device.

9.1.1

Initialization

The BlueNRG-1 BLE stack must be correctly initialized before establishing a connection

with another Bluetooth LE device. This is done with two commands:

aci_gatt_init();

aci_gap_init(GAP_PERIPHERAL_ROLE, 0, 0x07, &service_handle, &dev_name_char_handle,

&appearance_char_handle);

See BlueNRG-1 BLE stack API documentation for more information on these and following

commands.

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