Is there a way to reduce the link loss detection time?

[nordicdev]

ble_gap.hHi, At the moment, when a link loss is detected (in a connected mode), it takes around 3 seconds for it to be identified (with DISCONNECTED event). Is there a way to reduce this link loss detection time from 3 seconds to less than a second? Thanks.

[nordicdev]

Thanks for the reply, endnode. You are correct. Found this in ble_gap.h : "The Supervision_Timeout in milliseconds shall be larger than (1 + Conn_Latency) * Conn_Interval_Max * 2, where Conn_Interval_Max is given in milliseconds." .

My max conn interval is 30msec and conn latency is 0.

hash define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(30, UNIT_1_25_MS)
hash define SLAVE_LATENCY 0
hash define SUPERVISION_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)

Hence, I can reduce my supervision timeout from 4 seconds to 1 second. This works! Now, I get link loss indication after 1 second the link is actually lost. Thanks, again Endnode!