peripheral + observer : scanning problem.

If your connection interval is faster than your scan window, scanning will not work because the device will not be able to scan without missing connection events. You might want to try tweaking your parameters.

One way to actually verify what the CC254x is doing is to have a setup with an oscilloscope such as is described in this app note: http://www.ti.com/lit/an/swra347a/swra347a.pdf. By doing this you can clearly see the connection events and scanning events as they occur.

Thank you for your answer.

I still have questions.

The point of my question is the relation of DEFAULT_SCAN_DURATION and connection.

I checked sleep mode timing by GPIO test port and oscilloscope.

Please check attatched file.

 0385.the wave form.xlsx

1. in adversting mode,   

    scan is always working well.   

    the sleep timing is working as my configuration (scan window, interval, duration)

2. in connection mode (if DEFAULT_SCAN_DURATION is 3000)

   scan is always working well.   

   the sleep timing is working as my configuration (scan window, interval, duration)

3. in connection mode (if DEFAULT_SCAN_DURATION is 1000)   

    scan works somtimes and fail sometims.   

    the sleep timing works irregularly.

    please tell me the relation of DEFAULT_SCAN_DURATION and connection.

my seettings are as follows:

the advertise interval is 1000msec.   

GAP_SetParamValue( TGAP_GEN_DISC_ADV_INT_MIN, 1600);   

GAP_SetParamValue( TGAP_GEN_DISC_ADV_INT_MAX, 1600 );

the connection interval is 2000msec.          

DEFAULT_DESIRED_MIN_CONN_INTERVAL =  200          

DEFAULT_DESIRED_MAX_CONN_INTERVAL = 1600          

DEFAULT_ENABLE_UPDATE_REQUEST = TRUE

the scan window timing is 200msec.

the scan interval timing is 300msec.     

#define TIME_SCAN_INT          (300/0.625)     

#define TIME_SCAN_WIND          (200/0.625)  

GAP_SetParamValue ( TGAP_GEN_DISC_SCAN_INT,  TIME_SCAN_INT);  

GAP_SetParamValue  (TGAP_GEN_DISC_SCAN_WIND, TIME_SCAN_WIND);  

GAP_SetParamValue ( TGAP_LIM_DISC_SCAN_INT,  TIME_SCAN_INT);  

GAP_SetParamValue  (TGAP_LIM_DISC_SCAN_WIND, TIME_SCAN_WIND);

GAP_SetParamValue ( TGAP_CONN_SCAN_INT,  TIME_SCAN_INT);  

GAP_SetParamValue  (TGAP_CONN_SCAN_WIND, TIME_SCAN_WIND);

the interval of GAPObserverRole_StartDiscovery() is 5sec.

how to only listen for advertising packets, and receive payload data?

http://e2e.ti.com/support/wireless_connectivity/f/538/p/345382/1242144.aspx#1242144