why the INVALID_STATE error code appear???And how to solve??

[jimlin]

Hi all,

In my keyboard application, I found sometimes it return the INVALID_STATE error code , when called keys_send() , once this error code appeared, no others return by keys_send() again.
But the connection state is always CONNECTED, both in device side and the host side (it displays CONNECTED in the host side).
I want to know:

1.why will it happen while CONNECTED? 2.what could I do to excute the keys_send() correctly?

Thanks a lot.

Jim

[jimlin]

Hi John, I have tried to set the SIZE with +1/+2 even +10 but the error still alive.Another way to increase the APP_TIMER_SIZE by 1 while not use factly but get the same result. Any way to try?