SR3's BLE loses control after google voice search on Android O device.

RE: SR3's BLE loses control after google voice search on Android O device.

Filip Kubicz — Wed, 13 Jun 2018 11:51:15 GMT

Android TV Voice (ATVV) service enables you to use Smart Remote as Bluetooth Low Energy voice input without modifying Android TV host. It should be supported in hosts since Android 8.0.
It can be enabled in SR3 firmware with CONFIG_AUDIO_ATVV_ENABLED.

RE: SR3's BLE loses control after google voice search on Android O device.

Ralph — Tue, 12 Jun 2018 09:56:16 GMT

Hi, Filip

What if we use ATVVP instead of HID ? What is ATVVP?

Can you give a simple explanation, the difference between ATVVP & HID?

Thanks.

RE: SR3's BLE loses control after google voice search on Android O device.

Filip Kubicz — Tue, 12 Jun 2018 08:03:34 GMT

Great to hear that the problem is solved. Thanks!

RE: SR3's BLE loses control after google voice search on Android O device.

Ralph — Tue, 12 Jun 2018 07:57:01 GMT

Filip, Yes, we have integrated NVS with our Android system before.

Few hours ago , Nordic AE in our country was asked by our local distributor , and they told us need to comment one line code of android system in btif/co/bta_hh_co.cc:

static int uhid_read_event(btif_hh_device_t* p_dev)

switch (ev.type)

{

case UHID_CLOSE:

APPL_TRACE_DEBUG("UHID_CLOSE from uhid-dev\n");

//p_dev->ready_for_data = false; //this line

break;

}

And it works as before. Thanks for your help and efforts.

RE: SR3's BLE loses control after google voice search on Android O device.

Filip Kubicz — Tue, 12 Jun 2018 07:16:25 GMT

Ralph, thank you for this information. You are streaming audio over HID (Voice over HID over GATT).

This means that your audio packets are transmitted as HID data using BLE HID service. This also means that you need to reassembly and decode audio data on host side. Standard way to do this is using Nordic Voice System (NVS) which is a host side software enabling you to use this audio streamed from Smart Remote as a microphone input in Linux or Android system.

However, as far as I know, to integrate NVS to Android you need to modify the Android system, which is possible with e.g. Android Open Source Project. You had it working before, so probably you have integrated NVS with your Android before?

More information about audio streaming and NVS: http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sr3nrf52.firmware/nvs.html?cp=9_3_1_4_2

RE: SR3's BLE loses control after google voice search on Android O device.

Ralph — Tue, 12 Jun 2018 02:12:48 GMT

Hi, Filip

Default setting : CONFIG_AUDIO_HID_ENABLED 1 , CONFIG_AUDIO_ATVV_ENABLED 0

I don't know the difference between these services.

Thanks.

Ralph

RE: SR3's BLE loses control after google voice search on Android O device.

Filip Kubicz — Mon, 11 Jun 2018 13:31:00 GMT

Hi Ralph,

how do you stream voice from Smart Remote to Android host? Do you use Voice over HID over GATT (VoHoG) or Android TV Voice (ATVV) service?

Kind regards,
Filip