I try to use hcidump, capture CSR dongle on ubuntu14.4. I can find SDK8.1.1 s110 keypad demo create connection fail.
HCI Event: Command Complete (0x0e) plen 4 LE Set Scan Enable (0x08|0x000c) ncmd 1 status 0x00 HCI Event: LE Meta Event (0x3e) plen 40 LE Advertising Report ADV_IND - Connectable undirected advertising (0) bdaddr EE:30:98:D1:71:21 (Random) Complete local name: 'Nordic_Keyboard' Unknown type 0x19 with 2 bytes data Flags: 0x05 Complete service classes: 0x1812 RSSI: -87
< HCI Command: LE Create Connection (0x08|0x000d) plen 25 bdaddr EE:30:98:D1:71:21 type 1 interval 96 window 48 initiator_filter 0 own_bdaddr_type 0 min_interval 40 max_interval 56 latency 0 supervision_to 42 min_ce 0 max_ce 0
HCI Event: Command Status (0x0f) plen 4 LE Create Connection (0x08|0x000d) status 0x00 ncmd 1 < HCI Command: LE Create Connection Cancel (0x08|0x000e) plen 0 HCI Event: Command Complete (0x0e) plen 4 LE Create Connection Cancel (0x08|0x000e) ncmd 1 0000: 00 . HCI Event: LE Meta Event (0x3e) plen 19 LE Connection Complete status 0x02 handle 0, role master bdaddr EE:30:98:D1:71:21 (Random)