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Need basic BLE Remote Control Device to control audio playback

user116431

I am very new to the Nordic line and I have an nRF5340-DK that I would like to build a basic BLE Remote Control project.  The Remote Control must pair with a phone or computer and control the audio playback controls.  I assume this is an HID type interface.

I am able to build and debug the "Hello World" application so I am mostly looking for a good BLE remote example app to start with as a base.

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  • 0

    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.

     

  • 0 in reply to user116384

    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?

  • +1 in reply to user116431

    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 '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

  • 0 in reply to user116431

    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!

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  • 0 in reply to user116431

    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!

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