BLE services

Smart Remote integrates several Bluetooth Low Energy services.

SDK-based services

The following BLE services used by Smart Remote come from the nRF5 SDK v14.2.0.

• Battery Service
• Device Information Service
• HID over GATT Service
• Immediate Alert Service
• Nordic UART Service (NUS)

Smart Remote based services

Smart Remote 3 nRF52 v1.2 adds the following services on top of nRF5 SDK v14.2.0.

• Voice over BLE for Android implementation - Android TV Voice (ATVV) Service (experimental feature).
• BLE DFU submodule - Buttonless Device Firmware Update (DFU) Service modified to support Over-The-Air Device Firmware Update (OTA-DFU) in Smart Remote.

Enabling services

The services are initialized in the communications module, in m_coms_ble_init.

Battery service and battery measurement can be enabled with CONFIG_BATT_MEAS_ENABLED.

DFU service is active if DFU is enabled with CONFIG_DFU_ENABLED.

Nordic UART Service is used by CLI over BLE. See Bluetooth Console.

Immediate Alert Service is enabled if CONFIG_LED_SIGNAL_IMMEDIATE_ALERT or CONFIG_BUZZER_ENABLED are active.

Voice can be transmitted from Smart Remote to the host in two ways:

• Using BLE HID over GATT submodule - it uses NVS on the host side to receive audio stream. Enable it with CONFIG_AUDIO_HID_ENABLED.
• Using Voice over BLE for Android implementation - the audio stream can be received by an Android TV host. Enable it with CONFIG_AUDIO_ATVV_ENABLED.

DFU service, ATVV service, and NUS use vendor-specific UUIDs.