nrf51 mouse delay

[bear_xiong]

dear :

 i used sdk 12.3 development  bt mouse.  now i  have a  question.

when one mouse link pc , its mouse x/y axis is ok.

but if two mouse( same code) link pc. oen mouse x/y axis is delay, but other mouse is ok.

and the two mouse x/y axis maybe is 1 is ok, maybe  2 is ok.

but if only use one mouse link pc, it is ok. 

i do not know why?

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Minimum connection interval (7.5 ms). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(15, UNIT_1_25_MS) /**< Maximum connection interval (15 ms). */
//#define SLAVE_LATENCY 20

i try  SLAVE_LATENCY change to 0  have same problem.

 

[Vidar Berg]

Hello,

Please verify this one more than PC if possible. Also, is this seen on Windows 10, Linux or macOS?

Thanks, 

Vidar

[bear_xiong]

hello.

we test windows 10 . i try   two  logitech mouse in the same pc  .it is ok.

[Vidar Berg]

Hello,

Are both of the Logitech ones communicating over BLE and not Bluetooth classic or through the 'unify' dongle?

[bear_xiong]

hi

logitech and my mouse are both through dongle。。

i find sdk12.3 mouse demo ， every 8ms  call mouse_movement_send()   for x/y. bud pc bushound usb time is not 8ms. it is not delay or fast.

but logitech is every 10ms at hushound.

why?

[Vidar Berg]

Hi,

Can you try to set the MIN_CONN_INTERVAL==MAX_CONN_INTERVAL==7.5ms and see if it helps. It may also be helpful to capture a sniffer trace to compare the two (nRF sniffer).

[bear_xiong]

hi. thanks very much. setting MIN_CONN_INTERVAL==MAX_CONN_INTERVAL ==7.5ms., i see bushound usb time is about 8ms most payloads.

i have some questions:

1. if MIN=MAX =7.5ms. have some problem for different system( andor or mac)?

2.  how many mouses (with same code) can be connected for one pc?  pc or mouse have  astrict?