Smart Remote 3, keyboard keys are not received on Android TV when disabling power management

[sguitton01]

Hi all, 

I get a really weird issue developing on the smart remote 3 project.

I work with my own hardware design, and as I want a specific behaviour I disabled power_management go to sys off when remote is disconnecting or when the advertising stops.

Once I have done this, when testing on Android TV (Nvidia Shied alike), I can connect correctly to it, I get voice and consumer keys but Keyboard keys are not always received (sometimes I get all of them (20% of times), or none (80%)). It seems that sometimes I connect alright and sometimes I don't. It works perfectly on Windows and on smartphones.

Can you reproduce this issue? Do you have any idea how to solve this issue?

Thanks in advance

[Edvin]

Hello,

(sometimes I get all of them (20% of times), or none (80%)

 

 Ok, so that would suggest that there is not something wrong in the way that you set up the characteristic for the HID keyboard. 

I didn't quite understand the shutdown things you explained. You disable all shutdown, so that nrf_pwr_mgmt_shutdown() is never called? Is that correct?

Can you check one thing? When you press a button (keyboard key), and it doesn't go through, can you find the sd_ble_gatts_hvx() that is called when you press the key? What does it return?

Best regards,

Edvin

[sguitton01]

Hello Edvin,

Yes I mentionned that I disabled all  nrf_pwr_mgmt_shutdown() and it seems that it's at that point the issue appeared.

When I have the issue and pressing a button (keyboard), sd_ble_gatts_hvx() still returns NRF_SUCCESS.

Best regards,

Sylvain

[Edvin]

Can you try to disable them one at the time to see if it is one of them that causes the keyboard buttons to fail? If so, which one that causes the issue to appear?