SDK16.0 NUS service sometimes connecting timeout

[roy yao]

Hi,

    I am using SDK16.0(ble_app_uart) program to sending dates between the phone and board.When I use my iphone xs max,it works on well.But it come out some faults when it connecting iphone 6s.Plese tell me how can I change my code to fix it.

[roy yao]

Hi Edvin,

   Thanks again for helping me find the problem.

   After searching the same questions in community,I have solved problem.I change the external crystal oscillator to internal oscillator.It works on well now.

  Here is my change code:

NRF_SDH_CLOCK_LF_SRC = 0
NRF_SDH_CLOCK_LF_RC_CTIV = 16    //4S
NRF_SDH_CLOCK_LF_RC_TEMP_CTIV = 2
NRF_SDH_CLOCK_LF_ACCURACY = 1  //500ppm

   The thing that really confuses me is there have been so many same problems happen,why nordic did't change it?