random disconnect reason 0x08

[strengthstrong]

I use the ble_uart sdk14.2.0 example, I just open the pwm, and then accept the data, I did not deal with the data received from nus, just a connection, a connection error 0x08 random, my configuration of sdk.config just the agreement Stack clock to the internal rc, NRF_SDH_CLOCK_LF_RC_CTIV = 16, NRF_SDH_CLOCK_LF_RC_TEMP_CTIV = 2, NRF_SDH_CLOCK_LF_XTAL_ACCURACY, CLOCK_ENABLE main.cif this has no effect,

[Petter Myhre]

0x08 is BLE_HCI_CONNECTION_TIMEOUT, and this happens because the supervision timeout is hit (no packets from the peer is received in x seconds).

Is this a custom board? Have you tried the same code on the nRF52 DK? Does it happen there?

What value does NRF_SDH_CLOCK_LF_XTAL_ACCURACY have? Try setting it to 1.

What kind of central device are you connecting to?

[strengthstrong]

central is android phone and i use nrf52810 , when i use external crystal ,Good effect,Connection 12 hours did not disconnect, but again test, there is a timeout, did not appear after, I do not know why this is. No problem with my timeout parameter, NRF_SDH_CLOCK_LF_XTAL_ACCURACY = 7

[strengthstrong]

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) 
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) 
#define SLAVE_LATENCY 0 
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) 

#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) 
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) 
#define MAX_CONN_PARAMS_UPDATE_COUNT 2 

#define DEFAULT_ADV_INTERVAL 10
#define DEFAULT_ADV_TIMEOUT 0

[Petter Myhre]

So it works if you use low frequency crystal? And not if you use RC oscillator? If you use RC oscillator, please try to set NRF_SDH_CLOCK_LF_XTAL_ACCURACY to 1.

I'm not sure what kind of timeout you are talking about, could you elaborate?