S130 and scan performance potential issue

[Fabien Comte]

Hello,

I use S130 with NUS style connections as central and device at same time. It works nice and performance is good but when i run scan, performance become very poor.

I need active scan to see any iBeacon in proximity area and / or any new potential device.

Is there any way to fix that ? Fast "passive" scan at same time that fast connections ?

edit:

Performance is a "ping" latency (question from nRF51 board A to nRF51 board B then response from B to A)

define MIN_CONNECTION_INTERVAL (1 * BLE_GAP_CP_MIN_CONN_INTVL_MIN)

define MAX_CONNECTION_INTERVAL (1 * BLE_GAP_CP_MIN_CONN_INTVL_MIN)

define SLAVE_LATENCY 0

define SUPERVISION_TIMEOUT MSEC_TO_UNITS(1000, UNIT_10_MS)

define SCAN_INTERVAL MSEC_TO_UNITS(10, UNIT_0_625_MS)

define SCAN_WINDOW MSEC_TO_UNITS(5, UNIT_0_625_MS)

=> 20 to 30 ms (10 ms resolution)

define MIN_CONNECTION_INTERVAL (1 * BLE_GAP_CP_MIN_CONN_INTVL_MIN)

define MAX_CONNECTION_INTERVAL (1 * BLE_GAP_CP_MIN_CONN_INTVL_MIN)

define SLAVE_LATENCY 0

define SUPERVISION_TIMEOUT MSEC_TO_UNITS(1000, UNIT_10_MS)

define SCAN_INTERVAL MSEC_TO_UNITS(10, UNIT_0_625_MS)

define SCAN_WINDOW MSEC_TO_UNITS(10, UNIT_0_625_MS)

=> 200 ms (10 ms resolution)

Thank you.

[Petter Myhre]

You are not very specific. Could you please include what connection and scan parameters you are using? What do you mean by performance? Throughput? Latency? What are your requirements? What kind of performance do you expect? What are fast scan and fast connections?