nrf51822 send media key to android device

[h.namazian]

hey I have a nRF51822 eval board and I want to use it as hid keyboard to send some media key such as vol+/- play/pause, etc. I have used the example code ble_hid_keyboard and it works well to send characters but I don't know how to send these media keys. thanks

[FormerMember]

From what I can see in USB HID Usage Tables on p. 56, vol +/- and play/pause has the following commands:

• Volume up: 0x80
• Volume down: 0x81
• Play/pause: seems to be described in chapter 3.4.4 "Alternate Types"

Update 26.10.2016: This example on github shows how to transfer vol+/-, play/pause. The example is for an older SDK, but the HID part/HID coding will be the same with a newer SDK.

[josh]

Has anyone got the solution Kristin linked to work?

I'm using SDK v12.3, started with the HID example and that works, I can see the keystrokes in android. I updated hids_init() to match the github example code and replaced keys_send() calls with consumer_control_send, but so far I'm not having any luck getting the device to respond.

Edit: I've got it working now, it was something in the report map. Since all I want to do is control media, I updated to the report map in the main.c file that is attached to this thread and it's working.