ble_db_discovery_start doesn't complete with specific phone

[RobbLev]

My project uses nRF52840-DK to connect, bond and discover a custom service with two characteristics (TX and RX) and RX Characteristic has a CCCD (0x2902).

The flow of the software goes as follow:

1) the nRF connects to the phone

2) the nRF bonds to the phone

3) the nRF starts discovery of the service

4) the nRF reads/writes from/to the phone using the service

This works as expected with different phones I tried (Galaxy S6, S6 Edge and S7, android versions 7.0, 7.0 and 8.0). but when using Galaxy A31 android version 10.0 I can't complete discovery. I added a print to ble_db_discovery_on_ble_evt() and noticed that with the issued phone I don't get the events with BLE_GATTC_EVT_CHAR_DISC_RSP (50) and BLE_GATTC_EVT_DESC_DISC_RSP (51) which I do get with the working phones.

Furthermore, the issued phone gets a disconnect after some time with error BLE_HCI_CONNECTION_TIMEOUT, which I believe happens because the discovery prevents the nRF to maintain the connection (I saw that with out calling  ble_db_discovery_start the connection doesn't disconnect after a long time).

Does anyone have an idea why this happens?

Thanks in advance

Log of working phone:

<debug> ble_db_disc: Starting discovery of service with UUID 0x1101 on connection handle 0x0.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Primary Services Discovery Request
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 48
<debug> ble_db_disc: Found service UUID 0x1101.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 50
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 50
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Descriptor Request
<debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 51
<info> ble_db_disc: 0 cccd_handle 43
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Descriptor Request
<debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 51
<debug> ble_db_disc: Discovery of service with UUID 0x1101 completed with success on connection handle 0x0.
<info> app: Discovery complete.

Log of issued phone:

<debug> ble_db_disc: Starting discovery of service with UUID 0x1101 on connection handle 0x0.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Primary Services Discovery Request
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 48
<debug> ble_db_disc: Found service UUID 0x1101.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
****AFTER A FEW SECONDS*****
<debug> ble_db_disc: XXXX: ble_db_discovery_on_ble_evt 17
<info> app: Disconnected. conn_handle: 0x0, reason: 0x8

[Kenneth]

The disconnect reason is BLE_HCI_CONNECTION_TIMEOUT (0x08), so I suspect that the lfclk tolerance is marginally out of spec.

Can you provide the parameters you have set for the clock_lf_cfg that is passed to sd_softdevice_enable()?

Kenneth

[RobbLev]

Thanks for the reply Kenneth,

I haven't changed the default values and using the SDK nrf_sdh_enable_request(). the params are:

    nrf_clock_lf_cfg_t const clock_lf_cfg =
    {
        .source       = NRF_SDH_CLOCK_LF_SRC,
        .rc_ctiv      = NRF_SDH_CLOCK_LF_RC_CTIV,
        .rc_temp_ctiv = NRF_SDH_CLOCK_LF_RC_TEMP_CTIV,
        .accuracy     = NRF_SDH_CLOCK_LF_ACCURACY
    };

should I have changed any of them?

[RobbLev]

I'm currently getting mixed up with the sniffer so I tried using the nRF connect app to get the log out.

I saw the disconnect happens with the error: Error 8 (0x8): GATT CONN TIMEOUT.

and not BLE_HCI_CONNECTION_TIMEOUT as I wrote.

looking in the forum I saw this post from two years ago and wondered if the bug is a compatibility issue.

https://devzone.nordicsemi.com/f/nordic-q-a/43081/gatt-conn-timeout

[RobbLev]

I would really like to know why the function sd_ble_gattc_characteristics_discover() which I see is called during the discovery process doesn't trigger the BLE_GATTC_EVT_CHAR_DISC_RSP event as the old androids do. This is the only difference I see between the two flows.

Any ideas?

Thanks.

[Kenneth]

A sniffer log should quickly show the reason.

Kenneth

[RobbLev]

Thanks for all help until now.
I did the sniffer with the problematic phone (A31) and with the phone that works as wanted (S6 edge). Not sure how to show you the log. I'm attaching the wireshark captures and logs.

Thanks

problematic phone log:

Fullscreen a31_log.txt Download

30389	180.939787	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
30391	180.939787	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	35	Control Opcode: LL_LENGTH_REQ
30392	180.939787	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	35	Control Opcode: LL_SLAVE_FEATURE_REQ
30393	180.955413	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
30394	180.955413	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	35	Control Opcode: LL_LENGTH_RSP
30396	180.955413	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	32	Control Opcode: LL_VERSION_IND
30397	180.971037	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	32	Control Opcode: LL_VERSION_IND
30398	180.971037	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Handle Value Indication, Handle: 0x0003 (Unknown)
30400	180.971037	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	33	Rcvd Exchange MTU Response, Server Rx MTU: 247
30404	180.986660	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
30405	181.002284	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
30406	181.002284	Slave_0x11f6c9b7	Master_0x11f6c9b7	L2CAP	42	Connection Parameter Update Request
30407	181.002284	Master_0x11f6c9b7	Slave_0x11f6c9b7	L2CAP	36	Connection Parameter Update Response (Accepted)
30408	181.002284	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
30409	181.017911	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	38	Control Opcode: LL_CONNECTION_UPDATE_REQ
30411	181.017911	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
30414	181.033530	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
30415	181.033530	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	53	L2CAP Fragment Start
30417	181.033530	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
30420	181.049120	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
30421	181.049120	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
30424	181.064719	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
30425	181.064719	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
30428	181.080343	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
30429	181.080343	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
30432	181.095968	Slave_0x11f6c9b7	Master_0x11f6c9b7	L2CAP	42	Connection Parameter Update Request
30433	181.095968	Master_0x11f6c9b7	Slave_0x11f6c9b7	L2CAP	36	Connection Parameter Update Response (Accepted)
30435	181.095968	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	38	Control Opcode: LL_CONNECTION_UPDATE_REQ
30557	181.971015	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	37	Sent Pairing Request: AuthReq: Bonding | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
30836	184.080333	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	37	Rcvd Pairing Response: AuthReq: Bonding, MITM | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
30837	184.095906	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	47	Sent Pairing Confirm
30840	184.111597	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	47	Rcvd Pairing Confirm
30841	184.127219	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	47	Sent Pairing Random
30844	184.142848	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	47	Rcvd Pairing Random
30847	184.174096	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	49	Control Opcode: LL_ENC_REQ
30850	184.189721	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	39	Control Opcode: LL_ENC_RSP
30852	184.205346	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	27	Control Opcode: LL_START_ENC_REQ
30853	184.220971	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	27	Control Opcode: LL_START_ENC_RSP
30856	184.236596	Slave_0x11f6c9b7	Master_0x11f6c9b7	LE LL	27	Control Opcode: LL_START_ENC_RSP
30858	184.252156	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	47	Rcvd Encryption Information
30860	184.267778	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	41	Rcvd Master Identification
30862	184.283429	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	47	Rcvd Identity Information
30864	184.299052	Slave_0x11f6c9b7	Master_0x11f6c9b7	SMP	38	Rcvd Identity Address Information
30865	184.314677	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	47	Sent Encryption Information
30867	184.314677	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	41	Sent Master Identification
30869	184.314677	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	47	Sent Identity Information
30871	184.314677	Master_0x11f6c9b7	Slave_0x11f6c9b7	SMP	38	Sent Identity Address Information
30940	184.830266	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	39	Rcvd Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
30941	184.830266	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Find By Type Value Response
30944	184.861518	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0xffff
30945	184.861518	Master_0x11f6c9b7	Slave_0x11f6c9b7	LE LL	53	L2CAP Fragment Start
30947	184.877147	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
30950	184.877147	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, Device Name, Handles: 0x0001..0xffff
30951	184.892770	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	39	Sent Read By Type Response, Attribute List Length: 1
30954	184.908429	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0xffff
30955	184.924045	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
31143	186.330238	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	53	Sent Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
31146	186.345877	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	35	Rcvd Find By Type Value Response
31147	186.361552	Master_0x11f6c9b7	Slave_0x11f6c9b7	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x0028..0xffff
31150	186.377177	Slave_0x11f6c9b7	Master_0x11f6c9b7	ATT	74	Rcvd Read By Type Response, Attribute List Length: 2, Unknown, Unknown

working phone log:

Fullscreen s6_log.txt Download

28401	262.933643	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
28402	262.933643	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
28404	262.933643	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	35	Control Opcode: LL_LENGTH_REQ
28407	262.949267	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	35	Control Opcode: LL_SLAVE_FEATURE_REQ
28408	262.949267	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
28411	262.949267	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
28415	262.964891	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	33	Rcvd Exchange MTU Response, Server Rx MTU: 247
28419	262.980585	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	32	Control Opcode: LL_VERSION_IND
28420	262.996208	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	32	Control Opcode: LL_VERSION_IND
28473	263.183703	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
28474	263.199267	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
28479	263.214887	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
28480	263.214887	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
28483	263.230557	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
28484	263.230557	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	53	L2CAP Fragment Start
28486	263.230557	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
28489	263.246140	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
28490	263.246140	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
28493	263.261764	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
28494	263.261764	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
28499	263.277386	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
28500	263.277386	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
28672	263.933649	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	37	Sent Pairing Request: AuthReq: Bonding | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
28687	263.980563	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	37	Rcvd Pairing Response: AuthReq: Bonding, MITM | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
28688	263.996187	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	47	Sent Pairing Confirm
28693	264.011812	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	47	Rcvd Pairing Confirm
28694	264.011812	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	47	Sent Pairing Random
28697	264.027372	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	47	Rcvd Pairing Random
28700	264.043017	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	49	Control Opcode: LL_ENC_REQ
28703	264.043017	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	39	Control Opcode: LL_ENC_RSP
28707	264.058618	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	27	Control Opcode: LL_START_ENC_REQ
28708	264.058618	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	27	Control Opcode: LL_START_ENC_RSP
28711	264.074242	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	27	Control Opcode: LL_START_ENC_RSP
28715	264.089933	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	47	Rcvd Encryption Information
28717	264.089933	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	41	Rcvd Master Identification
28719	264.089933	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	47	Rcvd Identity Information
28721	264.089933	Slave_0x9027eb1f	Master_0x9027eb1f	SMP	38	Rcvd Identity Address Information
28722	264.089933	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	47	Sent Encryption Information
28724	264.105492	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	41	Sent Master Identification
28726	264.105492	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	47	Sent Identity Information
28728	264.105492	Master_0x9027eb1f	Slave_0x9027eb1f	SMP	38	Sent Identity Address Information
28867	264.621107	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	39	Rcvd Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
28868	264.621107	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Find By Type Value Response
28875	264.636731	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0xffff
28876	264.652356	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	53	L2CAP Fragment Start
28878	264.652356	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
28887	264.683672	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0xffff
28888	264.683672	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
28899	264.730546	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
28900	264.730546	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
28903	264.746169	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, Device Name, Handles: 0x0001..0xffff
28904	264.746169	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	39	Sent Read By Type Response, Attribute List Length: 1
28907	264.761794	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
28908	264.761794	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
28911	264.777353	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
28912	264.777353	Master_0x9027eb1f	Slave_0x9027eb1f	LE LL	53	L2CAP Fragment Start
28914	264.777353	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
28917	264.792979	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
28918	264.792979	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
28921	264.808603	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
28922	264.808603	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
28925	264.824233	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
28926	264.824233	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
29318	266.292947	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	53	Sent Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
29321	266.308574	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	35	Rcvd Find By Type Value Response
29322	266.308574	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x0028..0xffff
29325	266.308574	Slave_0x9027eb1f	Master_0x9027eb1f	LE LL	53	L2CAP Fragment Start
29327	266.324198	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	47	Rcvd Read By Type Response, Attribute List Length: 2, Unknown, Unknown
29328	266.324198	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x002e..0xffff
29331	266.324198	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Attribute Profile: Unknown: Unknown)
29332	266.339879	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Find Information Request, Handles: 0x002b..0x002b
29335	266.339879	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	36	Rcvd Find Information Response, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
29336	266.355454	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Find Information Request, Handles: 0x002e..0xffff
29339	266.355454	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Attribute Profile: Unknown: Unknown)
29412	266.636758	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	35	Sent Write Request, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
29419	266.667968	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	31	Rcvd Write Response, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
29692	267.683570	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	53	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
29717	267.777354	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29718	267.792917	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29723	267.808544	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29724	267.808544	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29731	267.824166	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29732	267.839858	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29739	267.855443	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29740	267.871042	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29745	267.886695	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29746	267.886695	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29751	267.902317	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29752	267.917941	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29757	267.933569	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29758	267.933569	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29761	267.949203	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	37	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29762	267.949203	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29771	267.980413	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29772	267.996038	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29777	268.011662	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29778	268.011662	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29783	268.027289	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29784	268.027289	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29786	268.042916	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
29789	268.042916	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29790	268.058538	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29795	268.074163	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29796	268.074163	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29801	268.089788	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29802	268.105414	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29809	268.121037	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29810	268.136663	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29815	268.152308	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29816	268.152308	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29821	268.167911	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29822	268.167911	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29827	268.183535	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29828	268.199160	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29833	268.214785	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29834	268.214785	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29839	268.230409	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29840	268.246033	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29845	268.261662	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29846	268.261662	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29851	268.277284	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29852	268.292908	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29857	268.308534	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29858	268.308534	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29863	268.324164	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29864	268.339783	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29869	268.355406	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29870	268.355406	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29877	268.371031	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29878	268.386655	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29883	268.402295	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29884	268.402295	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29889	268.417934	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29890	268.433556	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29897	268.449183	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29898	268.464839	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29903	268.480404	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29904	268.480404	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29906	268.480404	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
29911	268.496029	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29912	268.511653	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29933	268.574191	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29934	268.589792	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29989	268.792964	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29990	268.792964	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
29995	268.808548	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
29996	268.824212	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30043	268.996078	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30044	268.996078	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30097	269.199181	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30098	269.199181	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30106	269.230445	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
30147	269.386643	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30148	269.386643	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30203	269.589757	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30204	269.605382	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30259	269.808502	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30260	269.808502	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30265	269.824127	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30266	269.839790	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30306	269.980431	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
30309	269.996055	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30310	269.996055	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30363	270.199179	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30364	270.199179	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30413	270.386681	Slave_0x9027eb1f	Master_0x9027eb1f	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
30414	270.386681	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
30506	270.730424	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
30706	271.480367	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
30906	272.230394	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
31106	272.980351	Master_0x9027eb1f	Slave_0x9027eb1f	ATT	42	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)

a31_withbond.pcapng s6_withbond.pcapng

[RobbLev]

In sdk_config.c:

// <o> NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size. 
#ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE
#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247
#endif

When changing NRF_SDH_BLE_GATT_MAX_MTU_SIZE to 200 or 100 fixes the issue and discovery is completed. though not understanding why it did so yet so if someone does have an idea I will love to hear.

[Kenneth]

That was strange, likely you avoid some race condition on the peer. Would be interesting to try to add just a fixed nrf_delay_ms(100); on the connected event (e.g. in nrf_ble_gatt_on_ble_evt() in nrf_ble_gatt.c try to add a 100ms delay between BLE_GAP_EVT_CONNECTED and on_connected_evt().

Kenneth

[RobbLev]

I tried this but it didn't solve the issue. tried with 100 and 500 ms delay, same result.

[RobbLev]

A new issue rose after the changed MTU. Again, only in the new android, I see that indication is enabled but data from the phone to the nRF isn't read. I send data via the nrf connect app which is connected, bonded and indication enabled, but nothing is triggered in the nRF.

In rare times it does work so I believe this is a race condition issue. maybe you have a better idea?

[Kenneth]

Maybe you can share sniffer log of when it works vs. when it doesn't work with the a31 & indication? So I may try to compare the two.

Does notification works as expected? There is no real need to use indication, you can solve the same with notification.

Kenneth

[RobbLev]

I'm using indicate because the app I'm trying to copy does indicate and I'm trying to simulate it as close as I can.

I didn't manage to reproduce the working flow on the a31 so I did the working flow with S6. I also did a time delay of 10 seconds between the discovery to the indicate enabling and another 10 seconds between the indicate enable to the writing to the MPA (which initializes the MPAs data transfer to the nRF).

A31 - not working:

4761	64.949278	Master_0	Slave_0	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
4763	64.949278	Master_0	Slave_0	LE LL	35	Control Opcode: LL_LENGTH_REQ
4764	64.964848	Slave_0	Master_0	LE LL	35	Control Opcode: LL_SLAVE_FEATURE_REQ
4765	64.964848	Master_0	Slave_0	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
4766	64.964848	Slave_0	Master_0	LE LL	35	Control Opcode: LL_LENGTH_RSP
4767	64.964848	Master_0	Slave_0	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
4768	64.964848	Slave_0	Master_0	LE LL	35	Control Opcode: LL_LENGTH_RSP
4770	64.980528	Slave_0	Master_0	LE LL	32	Control Opcode: LL_VERSION_IND
4771	64.980528	Master_0	Slave_0	LE LL	32	Control Opcode: LL_VERSION_IND
4772	64.980528	Slave_0	Master_0	ATT	37	Rcvd Handle Value Indication, Handle: 0x0003 (Unknown)
4774	64.996154	Slave_0	Master_0	ATT	33	Rcvd Exchange MTU Response, Server Rx MTU: 247
4778	65.011730	Slave_0	Master_0	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
4779	65.011730	Master_0	Slave_0	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
4780	65.011730	Slave_0	Master_0	L2CAP	42	Connection Parameter Update Request
4781	65.011730	Master_0	Slave_0	L2CAP	36	Connection Parameter Update Response (Accepted)
4782	65.027346	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
4783	65.027346	Master_0	Slave_0	LE LL	38	Control Opcode: LL_CONNECTION_UPDATE_REQ
4785	65.043022	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
4788	65.043022	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
4789	65.043022	Master_0	Slave_0	LE LL	53	L2CAP Fragment Start
4791	65.058597	Master_0	Slave_0	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
4794	65.058597	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
4795	65.058597	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
4798	65.074237	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
4799	65.074237	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
4802	65.089845	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
4803	65.089845	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
4806	65.105488	Slave_0	Master_0	L2CAP	42	Connection Parameter Update Request
4807	65.105488	Master_0	Slave_0	L2CAP	36	Connection Parameter Update Response (Accepted)
4809	65.121152	Master_0	Slave_0	LE LL	38	Control Opcode: LL_CONNECTION_UPDATE_REQ
4917	65.886763	Master_0	Slave_0	SMP	37	Sent Pairing Request: AuthReq: Bonding | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
4918	65.902385	Master_0	Slave_0	SMP	37	Sent Pairing Request: AuthReq: Bonding | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
5198	67.996093	Slave_0	Master_0	SMP	37	Rcvd Pairing Response: AuthReq: Bonding, MITM | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
5199	68.011720	Master_0	Slave_0	SMP	47	Sent Pairing Confirm
5362	69.230440	Slave_0	Master_0	SMP	47	Rcvd Pairing Confirm
5363	69.246067	Master_0	Slave_0	SMP	47	Sent Pairing Random
5366	69.261693	Slave_0	Master_0	SMP	47	Rcvd Pairing Random
5369	69.292889	Master_0	Slave_0	LE LL	49	Control Opcode: LL_ENC_REQ
5372	69.308509	Slave_0	Master_0	LE LL	39	Control Opcode: LL_ENC_RSP
5374	69.324131	Slave_0	Master_0	LE LL	27	Control Opcode: LL_START_ENC_REQ
5375	69.324131	Master_0	Slave_0	LE LL	27	Control Opcode: LL_START_ENC_RSP
5378	69.339760	Slave_0	Master_0	LE LL	27	Control Opcode: LL_START_ENC_RSP
5380	69.355384	Slave_0	Master_0	SMP	47	Rcvd Encryption Information
5382	69.371033	Slave_0	Master_0	SMP	41	Rcvd Master Identification
5384	69.386688	Slave_0	Master_0	SMP	47	Rcvd Identity Information
5386	69.402314	Slave_0	Master_0	SMP	38	Rcvd Identity Address Information
5387	69.417941	Master_0	Slave_0	SMP	47	Sent Encryption Information
5389	69.433505	Master_0	Slave_0	SMP	41	Sent Master Identification
5391	69.433505	Master_0	Slave_0	SMP	47	Sent Identity Information
5393	69.433505	Master_0	Slave_0	SMP	38	Sent Identity Address Information
5443	69.792873	Master_0	Slave_0	ATT	53	Sent Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
5446	69.808557	Slave_0	Master_0	ATT	35	Rcvd Find By Type Value Response
5447	69.824150	Master_0	Slave_0	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x0028..0xffff
5450	69.839807	Slave_0	Master_0	LE LL	50	L2CAP Fragment Start
5452	69.855430	Slave_0	Master_0	ATT	50	Rcvd Read By Type Response, Attribute List Length: 2, Unknown, Unknown
5453	69.871054	Master_0	Slave_0	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x002e..0xffff
5456	69.886678	Slave_0	Master_0	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Attribute Profile: Unknown: Unknown)
5457	69.902306	Master_0	Slave_0	ATT	35	Sent Find Information Request, Handles: 0x002b..0x002b
5460	69.917926	Slave_0	Master_0	ATT	36	Rcvd Find Information Response, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
5461	69.933511	Master_0	Slave_0	ATT	35	Sent Find Information Request, Handles: 0x002e..0xffff
5462	69.933511	Slave_0	Master_0	ATT	39	Rcvd Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
5463	69.949137	Master_0	Slave_0	ATT	35	Sent Find By Type Value Response
5464	69.949137	Slave_0	Master_0	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Access Profile: Unknown: Unknown)
5466	69.964761	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0xffff
5467	69.980387	Master_0	Slave_0	LE LL	53	L2CAP Fragment Start
5469	69.980387	Master_0	Slave_0	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
5472	69.996011	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0xffff
5473	70.011676	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
5476	70.027299	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, Device Name, Handles: 0x0001..0xffff
5477	70.042924	Master_0	Slave_0	ATT	39	Sent Read By Type Response, Attribute List Length: 1
6795	79.964595	Master_0	Slave_0	ATT	35	Sent Write Request, Handle: 0x002b (Generic Access Profile: Unknown: Client Characteristic Configuration)
6798	79.980221	Slave_0	Master_0	ATT	31	Rcvd Write Response, Handle: 0x002b (Generic Access Profile: Unknown: Client Characteristic Configuration)
8163	90.339321	Master_0	Slave_0	ATT	53	Sent Write Command, Handle: 0x002d (Generic Access Profile: Unknown)
9625	101.354779	Slave_0	Master_0	LE LL	28	Control Opcode: LL_TERMINATE_IND

S6 - working:

2964	39.728968	Master_0	Slave_0	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
2965	39.728968	Master_0	Slave_0	ATT	33	Sent Exchange MTU Request, Client Rx MTU: 247
2967	39.728968	Master_0	Slave_0	LE LL	35	Control Opcode: LL_LENGTH_REQ
2970	39.744593	Slave_0	Master_0	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
2974	39.760280	Slave_0	Master_0	LE LL	35	Control Opcode: LL_SLAVE_FEATURE_REQ
2975	39.760280	Master_0	Slave_0	LE LL	28	Control Opcode: LL_UNKNOWN_RSP
2978	39.760280	Slave_0	Master_0	ATT	33	Rcvd Exchange MTU Response, Server Rx MTU: 247
2982	39.775847	Slave_0	Master_0	LE LL	32	Control Opcode: LL_VERSION_IND
2983	39.791466	Master_0	Slave_0	LE LL	32	Control Opcode: LL_VERSION_IND
3038	39.994645	Slave_0	Master_0	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
3039	39.994645	Master_0	Slave_0	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
3046	40.025840	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
3047	40.025840	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
3050	40.041463	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
3051	40.041463	Master_0	Slave_0	LE LL	53	L2CAP Fragment Start
3053	40.041463	Master_0	Slave_0	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
3058	40.057086	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
3059	40.072711	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
3062	40.072711	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
3063	40.088334	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
3066	40.088334	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
3067	40.103961	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
3068	40.103961	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
3144	40.385264	Master_0	Slave_0	SMP	37	Sent Pairing Request: AuthReq: Bonding | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
3157	40.432119	Slave_0	Master_0	SMP	37	Rcvd Pairing Response: AuthReq: Bonding, MITM | Initiator Key(s): LTK, IRK | Responder Key(s): LTK, IRK
3158	40.447759	Master_0	Slave_0	SMP	47	Sent Pairing Confirm
3165	40.463333	Slave_0	Master_0	SMP	47	Rcvd Pairing Confirm
3166	40.479025	Master_0	Slave_0	SMP	47	Sent Pairing Random
3169	40.479025	Slave_0	Master_0	SMP	47	Rcvd Pairing Random
3172	40.494591	Master_0	Slave_0	LE LL	49	Control Opcode: LL_ENC_REQ
3175	40.494591	Slave_0	Master_0	LE LL	39	Control Opcode: LL_ENC_RSP
3179	40.510203	Slave_0	Master_0	LE LL	27	Control Opcode: LL_START_ENC_REQ
3180	40.525840	Master_0	Slave_0	LE LL	27	Control Opcode: LL_START_ENC_RSP
3183	40.525840	Slave_0	Master_0	LE LL	27	Control Opcode: LL_START_ENC_RSP
3187	40.541491	Slave_0	Master_0	SMP	47	Rcvd Encryption Information
3189	40.557078	Slave_0	Master_0	SMP	41	Rcvd Master Identification
3191	40.557078	Slave_0	Master_0	SMP	47	Rcvd Identity Information
3193	40.557078	Slave_0	Master_0	SMP	38	Rcvd Identity Address Information
3194	40.557078	Master_0	Slave_0	SMP	47	Sent Encryption Information
3196	40.557078	Master_0	Slave_0	SMP	41	Sent Master Identification
3198	40.557078	Master_0	Slave_0	SMP	47	Sent Identity Information
3200	40.557078	Master_0	Slave_0	SMP	38	Sent Identity Address Information
3204	40.572750	Master_0	Slave_0	ATT	37	Sent Read By Type Request, Central Address Resolution, Handles: 0x0001..0xffff
3207	40.572750	Slave_0	Master_0	ATT	35	Rcvd Read By Type Response, Attribute List Length: 1
3208	40.588390	Master_0	Slave_0	ATT	33	Sent Read Request, Handle: 0x001a (Generic Attribute Profile: Unknown: Central Address Resolution)
3211	40.588390	Slave_0	Master_0	ATT	32	Rcvd Read Response, Handle: 0x001a (Generic Attribute Profile: Unknown: Central Address Resolution)
3339	41.072747	Slave_0	Master_0	ATT	39	Rcvd Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
3340	41.072747	Master_0	Slave_0	ATT	35	Sent Find By Type Value Response
3342	41.088325	Master_0	Slave_0	ATT	53	Sent Find By Type Value Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
3347	41.103996	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0xffff
3348	41.103996	Master_0	Slave_0	LE LL	53	L2CAP Fragment Start
3350	41.103996	Master_0	Slave_0	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
3351	41.119597	Slave_0	Master_0	ATT	35	Rcvd Find By Type Value Response
3352	41.119597	Master_0	Slave_0	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x0028..0xffff
3359	41.135247	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0xffff
3361	41.135247	Slave_0	Master_0	LE LL	53	L2CAP Fragment Start
3362	41.135247	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
3363	41.150811	Slave_0	Master_0	ATT	47	Rcvd Read By Type Response, Attribute List Length: 2, Unknown, Unknown
3364	41.150811	Master_0	Slave_0	ATT	37	Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x002e..0xffff
3369	41.166496	Slave_0	Master_0	ATT	37	Rcvd Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff
3371	41.166496	Slave_0	Master_0	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Access Profile: Unknown: Unknown)
3372	41.166496	Master_0	Slave_0	ATT	44	Sent Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile
3374	41.166496	Master_0	Slave_0	ATT	35	Sent Find Information Request, Handles: 0x002b..0x002b
3377	41.182122	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, Device Name, Handles: 0x0001..0xffff
3378	41.182122	Master_0	Slave_0	ATT	39	Sent Read By Type Response, Attribute List Length: 1
3379	41.182122	Slave_0	Master_0	ATT	36	Rcvd Find Information Response, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
3380	41.197703	Master_0	Slave_0	ATT	35	Sent Find Information Request, Handles: 0x002e..0xffff
3381	41.197703	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x0001..0x0009
3382	41.197703	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0001 (Generic Access Profile)
3383	41.197703	Slave_0	Master_0	ATT	35	Rcvd Error Response - Attribute Not Found, Handle: 0x002e (Generic Attribute Profile: Unknown: Unknown)
3385	41.213320	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0001..0x0009
3386	41.213320	Master_0	Slave_0	LE LL	53	L2CAP Fragment Start
3388	41.213320	Master_0	Slave_0	ATT	33	Sent Read By Type Response, Attribute List Length: 4, Device Name, Appearance, Peripheral Preferred Connection Parameters, Central Address Resolution
3391	41.228940	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x0009..0x0009
3392	41.228940	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x0009 (Generic Access Profile: Central Address Resolution)
3395	41.244594	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Include Declaration, Handles: 0x000a..0xffff
3396	41.244594	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
3399	41.244594	Slave_0	Master_0	ATT	37	Rcvd Read By Type Request, GATT Characteristic Declaration, Handles: 0x000a..0xffff
3400	41.260194	Master_0	Slave_0	ATT	35	Sent Error Response - Attribute Not Found, Handle: 0x000a (Generic Attribute Profile)
6044	51.213164	Master_0	Slave_0	ATT	35	Sent Write Request, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
6053	51.244403	Slave_0	Master_0	ATT	31	Rcvd Write Response, Handle: 0x002b (Generic Attribute Profile: Unknown: Client Characteristic Configuration)
8790	61.572323	Master_0	Slave_0	ATT	53	Sent Write Command, Handle: 0x002d (Generic Attribute Profile: Unknown)
8819	61.681636	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8820	61.681636	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8827	61.697264	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8828	61.712885	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8843	61.759812	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8844	61.775444	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8849	61.791069	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8850	61.791069	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8855	61.806652	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8856	61.822317	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8859	61.822317	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8860	61.837943	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8865	61.853567	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8866	61.853567	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8869	61.869134	Slave_0	Master_0	ATT	37	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8870	61.869134	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8877	61.900421	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8878	61.900421	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8883	61.916067	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8884	61.916067	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8889	61.931693	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8890	61.947273	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8895	61.962939	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8896	61.962939	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8903	61.994150	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8904	61.994150	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8909	62.009772	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8910	62.025441	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8915	62.041005	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8916	62.041005	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8921	62.056630	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8922	62.056630	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8927	62.072294	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8928	62.087879	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8933	62.103564	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8934	62.103564	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8939	62.119187	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8940	62.134811	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8945	62.150437	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8946	62.150437	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8951	62.166061	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8952	62.181630	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8957	62.197270	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8958	62.197270	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8963	62.212895	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8964	62.228519	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8969	62.244125	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8970	62.244125	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8975	62.259749	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8976	62.259749	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8981	62.275407	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8982	62.291017	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8987	62.306643	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8988	62.306643	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8993	62.322307	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
8994	62.337934	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
8999	62.353516	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9000	62.353516	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9005	62.369182	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9006	62.384806	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9011	62.400387	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9012	62.400387	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9031	62.462932	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9032	62.478553	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9089	62.681673	Slave_0	Master_0	ATT	53	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9090	62.697301	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9097	62.712884	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9098	62.728530	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9099	62.728530	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)
9136	62.869129	Slave_0	Master_0	ATT	42	Rcvd Handle Value Indication, Handle: 0x002a (Generic Attribute Profile: Unknown)
9137	62.869129	Master_0	Slave_0	ATT	31	Sent Handle Value Confirmation, Handle: 0x002a (Generic Attribute Profile: Unknown)

as well I'm attaching the raw wireshark capturess6_no_indication_read_1.pcapnga31_no_indication_read_3.pcapng