question about scanning in ble_app_hrs_rscs_relay which is always disconnected with heart rate monitor?

[quentin]

When i use ble_app_hrs to connect with hrs demo(ble_app_hrs example), everything is ok.But when i connect to a heart rate monitor, it always disconnect.The print information is:

[DM]: Disconnect Reason 0x0008

[DM]: --> device_context_store

[DM]:[DI 00]:[CI 00]: -> No update in bonding information.

[DM]: --> gattc_context_store

[DM]: Notifying application of event 0x12

[APPL]: >> DM_EVT_DISCONNECTION

[DM]: >> dm_whitelist_create

[DM]: Created whitelist, number of IRK = 0x00, number of addr = 0x01

[DM]: << dm_whitelist_create

[APPL]: << DM_EVT_DISCONNECTION

[DM]:[CI 0x00]: Freeing connection instance

[DM]:[00]: Freed connection instance.

[DM]: Initializing Connection Instance 0x00000000.

[APPL]: 180d

[DM]: Request to allocation connection instance

[DM]:[00]: Connection Instance Allocated.

[DM]: Searching for device 0xB6 0x99 0x7F 0x04 0xA5 0x78.

[DM]:[DI 0x00]: Device type 0x00.

[DM]: Device Addr 0xB6 0x99 0x7F 0x04 0xA5 0x78.

[DM]: Found device at instance 0x00

[DM]:[00]:[Block ID 0x0003F800]:Loading bond information at 20002f14, size 0x0000001C, offset 0x00000018.

[DM]:[0x00]:[0xFF]: Bond context Event

[DM]: Notifying application of event 0x21

[APPL]: >> DM_EVT_LINK_SECURED

[APPL]: << DM_EVT_DEVICE_CONTEXT_LOADED

[DM]:[00]:Loading service context at 20002f30, size 0x0000000C, offset 0x00000034.

[DM]: --> gattc_context_load

[DM]: Notifying application of event 0x11

[APPL]: >> DM_EVT_CONNECTION

[APPL]:[B6 99 7F 04 A5 78]: Connection Established

[DM]: >> dm_security_setup_req

[DM]: << dm_security_setup_req, 0x00000000

[APPL]: << DM_EVT_CONNECTION

[DM]: >> BLE_GAP_EVT_CONN_SEC_UPDATE, Mode 0x01, Level 0x02

[DM]: --> gattc_context_apply

[DM]: Notifying application of event 0x15

[APPL]: >> DM_LINK_SECURED_IND

[DB]: Starting discovery of service with UUID 0x180d for Connection handle 0

[APPL]: << DM_LINK_SECURED_IND

[DB]: Discovery of service with UUID 0x180d completed with success for Connectionhandle 0

[DB]: Starting discovery of service with UUID 0x180f for Connection handle 0

[DB]: Discovery of service with UUID 0x180f completed with success for Connectionhandle 0

[HRS_C]: Heart Rate Service discovered at peer.

[HRS_C]: Configuring CCCD. CCCD Handle = 19, Connection Handle = 0

[HRS_C]: SD Read/Write API returns Success..

Heart rate service discovered

[BAS_C]: Battery Service discovered at peer.

[APPL]: Battery Service discovered.

[APPL]: Reading battery level.

[BAS_C]: SD Read/Write API returns error. This message sending will be attempted again..

[APPL]: Enabling Battery Level Notification.

[BAS_C]: Configuring CCCD. CCCD Handle = 46, Connection Handle = 0

[BAS_C]: SD Read/Write API returns error. This message sending will be attempted again..

[BAS_C]: SD Read/Write API returns Success..

[APPL]: Battery Level Read as 100 %

Battery = 100 %

[BAS_C]: SD Read/Write API returns Success..

[APPL]: Battery Level received 100 %

Battery = 100 %

What is the problem? Thanks

i use sniffer to get the information below: This is the error information:

This is the heart rate monitor connect with iphone 6(ios 9.3), that is ok

the information file is wireshark format: the err device file:ble_hrm_err.pcapng the ok device fileble_hrm_ok.pcapng

than with the demo "ble_app_hrs_c" of "nRF51_SDK_10.0.0_dc26b5e" and there are something different，when i change the "MAX_CONNECTION_INTERVAL" from "MSEC_TO_UNITS(30, UNIT_1_25_MS)" to MSEC_TO_UNITS(130, UNIT_1_25_MS) after the time increase, i can get a hrm data like this:

Heart rate service discovered Battery = 80 % Battery = 80 % Heart Rate = 73 Heart rate service discovered Battery = 80 % Battery = 80 % Heart Rate = 77

i think there may be some params is error, but i cann't find it.

[quentin]

the sdk version is nRF51_SDK_10.0.0_dc26b5e. I use the demo with keilMDK4.60

[Petter Myhre]

0x08 is BLE_HCI_CONNECTION_TIMEOUT, which probably means that the heart rate monitor stops responding to the packets from the central device. It is difficult say why. A sniffer trace might shed some light on why though. Are you able to sniff?

[quentin]

thank you for your reply. I use sniff to get some information.But didn't have any ideal.

[quentin]

When i change to another heart rate monitor, the data is ok and never disconnect. But the two hear rate monitor can connect to iphone 6. What is the different? Is there any compatibility issues?

[quentin]

The problem is solved.It has been discovered that there is a bug in and older TI CC254x stack that causes parameter update to fail if the window offset is = 0 (as it is in the Nordic stack). "sd_ble_opt_set" change the mode to BLE_GAP_OPT_COMPAT_MODE can solve it.