Need basic BLE Remote Control Device to control audio playback

RE: Need basic BLE Remote Control Device to control audio playback

user116431 — Wed, 25 May 2022 20:45:19 GMT

Marte,

I think you are right regarding the keyboard. I tried the keyboard solution and quickly had a connectable device that would send a "hello" message to my phone.

I tried the generic "peripheral_hids" and it seemed to build and flash to the Nordic but I did not see any devices advertising when I tried to pair with my phone. I assume I would have to do more configuration of the project or possibly it is not easily going to work with the nRF5340 DK hardware.

I will look at the multimedia keyboard features.

Thanks for the help!

RE: Need basic BLE Remote Control Device to control audio playback

user92402 — Wed, 25 May 2022 09:31:52 GMT

Hi,

No, it does not filter based on target CPU. If you start writing "hids" in the application template field you should get all the samples shown in user116384's picture:

The reason you do not find peripheral_hids is probably because you are looking for samples under nrf/samples, while peripheral_hids is a Zephyr sample, so it is located under zephyr/samples.

From your description the Peripheral HIDS keyboard sample is probably the best place to start. You want the remote control to be a peripheral. Additionally, for controlling audio you can use the HID profile with multimedia keys, sort of as a keyboard device:

0x07 0x00e8	0x00a4	KEY_PLAYPAUSE	3.0	0x0055	KEYCODE_MEDIA_PLAY_PAUSE
0x07 0x00e9	0x00a6	KEY_STOPCD	3.0	0x0056	KEYCODE_MEDIA_STOP
0x07 0x00ea	0x00a5	KEY_PREVIOUSSONG	3.0	0x0058	KEYCODE_MEDIA_PREVIOUS
0x07 0x00eb	0x00a3	KEY_NEXTSONG	3.0	0x0057	KEYCODE_MEDIA_NEXT
0x07 0x00ec	0x00a1	KEY_EJECTCD	3.0	0x0081	KEYCODE_MEDIA_EJECT
0x07 0x00ed	0x0073	KEY_VOLUMEUP	1.6	0x0018	KEYCODE_VOLUME_UP
0x07 0x00ee	0x0072	KEY_VOLUMEDOWN	1.6	0x0019	KEYCODE_VOLUME_DOWN
0x07 0x00ef	0x0071	KEY_MUTE	3.0	0x00a4	KEYCODE_VOLUME_MUTE

This table is from https://source.android.com/devices/input/keyboard-devices#hid-keyboard-and-keypad-page-0x07, so you can see there for more information.

For more information about the Peripheral HIDS keyboard sample you can read the sample's documentation here: Peripheral HIDS keyboard.

Best regards,

Marte

RE: Need basic BLE Remote Control Device to control audio playback

user116431 — Wed, 25 May 2022 00:14:59 GMT

After looking at my list of options I do not get "peripheral_hids" but I do get keyboard which I will try. Is this list filtered based on the target CPU?

RE: Need basic BLE Remote Control Device to control audio playback

user116431 — Tue, 24 May 2022 20:59:25 GMT

Thanks I will give that one a try.

RE: Need basic BLE Remote Control Device to control audio playback

user116384 — Tue, 24 May 2022 20:33:47 GMT

Assuming you are using VS Code and the nrf Connect SDK you can build application from sample. There are three/four samples that might be of use to you.