I am trying to pair with a BLE device from a RPI device. The first few
packets seem fine (Pairing Request, Pairing Response, LE Start
Encryption, Signing Information...) but in the end I get a "Pairing
Failed" SMP packet, with reason "Unspecified reason" :(
Any explanation what could be the ... reason ;) and how to solve this please?
Thanks!
PS. This is the btmon log:
< HCI Command: Reset (0x03|0x0003) plen 0
[hci0] 298.154979
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 298.157882
Reset (0x03|0x0003) ncmd 1
Status: Success (0x00)
< HCI Command: Set Event Filter (0x03|0x0005) plen 1
[hci0] 298.171262
Type: Clear All Filters (0x00)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 298.171657
Set Event Filter (0x03|0x0005) ncmd 1
Status: Success (0x00)
< HCI Command: Write Connection Accept Timeout (0x03|0x0016) plen 2
[hci0] 298.185592
Timeout: 20000.000 msec (0x7d00)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 298.186005
Write Connection Accept Timeout (0x03|0x0016) ncmd 1
Status: Success (0x00)
< HCI Command: Set Event Mask (0x03|0x0001) plen 8
[hci0] 298.198904
Mask: 0x3dbff807fffbffff
Inquiry Complete
Inquiry Result
Connection Complete
Connection Request
Disconnection Complete
Authentication Complete
Remote Name Request Complete
Encryption Change
Change Connection Link Key Complete
Master Link Key Complete
Read Remote Supported Features Complete
Read Remote Version Information Complete
QoS Setup Complete
Command Complete
Command Status
Hardware Error
Flush Occurred
Role Change
Mode Change
Return Link Keys
PIN Code Request
Link Key Request
Link Key Notification
Loopback Command
Data Buffer Overflow
Max Slots Change
Read Clock Offset Complete
Connection Packet Type Changed
QoS Violation
Page Scan Mode Change
Page Scan Repetition Mode Change
Flow Specification Complete
Inquiry Result with RSSI
Read Remote Extended Features Complete
Synchronous Connection Complete
Synchronous Connection Changed
Sniff Subrating
Extended Inquiry Result
Encryption Key Refresh Complete
IO Capability Request
IO Capability Request Reply
User Confirmation Request
User Passkey Request
Remote OOB Data Request
Simple Pairing Complete
Link Supervision Timeout Changed
Enhanced Flush Complete
User Passkey Notification
Keypress Notification
Remote Host Supported Features Notification
LE Meta
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 298.199255
Set Event Mask (0x03|0x0001) ncmd 1
Status: Success (0x00)
< HCI Command: Write LE Host Supported (0x03|0x006d) plen 2
[hci0] 298.214150
Supported: 0x01
Simultaneous: 0x01
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 298.214499
Write LE Host Supported (0x03|0x006d) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create Connection (0x08|0x000d) plen 25
[hci0] 302.516667
Scan interval: 60.000 msec (0x0060)
Scan window: 30.000 msec (0x0030)
Filter policy: White list is not used (0x00)
Peer address type: Random (0x01)
Peer address: D2:A7:4C:76:F3:E0 (Static)
Own address type: Public (0x00)
Min connection interval: 50.00 msec (0x0028)
Max connection interval: 70.00 msec (0x0038)
Connection latency: 0x0000
Supervision timeout: 420 msec (0x002a)
Min connection length: 0.000 msec (0x0000)
Max connection length: 0.000 msec (0x0000)
> HCI Event: Command Status (0x0f) plen 4 [hci0] 302.517237
LE Create Connection (0x08|0x000d) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 19 [hci0] 302.658079
LE Connection Complete (0x01)
Status: Success (0x00)
Handle: 64
Role: Master (0x00)
Peer address type: Random (0x01)
Peer address: D2:A7:4C:76:F3:E0 (Static)
Connection interval: 67.50 msec (0x0036)
Connection latency: 0.00 msec (0x0000)
Supervision timeout: 420 msec (0x002a)
Master clock accuracy: 0x00
> ACL Data RX: Handle 64 flags 0x02 dlen 16 [hci0] 307.789579
LE L2CAP: Connection Parameter Update Request (0x12) ident 2 len 8
Min interval: 6
Max interval: 12
Slave latency: 0
Timeout multiplier: 400
< HCI Command: LE Connection Update (0x08|0x0013) plen 14
[hci0] 307.813788
Handle: 64
Min connection interval: 7.50 msec (0x0006)
Max connection interval: 15.00 msec (0x000c)
Connection latency: 0x0000
Supervision timeout: 4000 msec (0x0190)
Min connection length: 0.000 msec (0x0000)
Max connection length: 0.000 msec (0x0000)
> HCI Event: Command Status (0x0f) plen 4 [hci0] 307.814226
LE Connection Update (0x08|0x0013) ncmd 1
Status: Success (0x00)
< ACL Data TX: Handle 64 flags 0x00 dlen 10
[hci0] 307.837601
LE L2CAP: Connection Parameter Update Response (0x13) ident 0 len 2
Result: Connection Parameters accepted (0x0000)
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 308.157176
Num handles: 1
Handle: 64
Count: 1
> HCI Event: LE Meta Event (0x3e) plen 10 [hci0] 308.272198
LE Connection Update Complete (0x03)
Status: Success (0x00)
Handle: 64
Connection interval: 15.00 msec (0x000c)
Connection latency: 0.00 msec (0x0000)
Supervision timeout: 4000 msec (0x0190)
< ACL Data TX: Handle 64 flags 0x00 dlen 11
[hci0] 315.133782
SMP: Pairing Request (0x01) len 6
IO capability: KeyboardOnly (0x02)
OOB data: Authentication data not present (0x00)
Authentication requirement: Bonding, MITM, Legacy, No Keypresses (0x05)
Max encryption key size: 16
Initiator key distribution: EncKey Sign (0x05)
Responder key distribution: EncKey Sign (0x05)
> ACL Data RX: Handle 64 flags 0x02 dlen 11 [hci0] 315.157207
SMP: Pairing Response (0x02) len 6
IO capability: NoInputNoOutput (0x03)
OOB data: Authentication data not present (0x00)
Authentication requirement: Bonding, No MITM, Legacy, No
Keypresses (0x01)
Max encryption key size: 16
Initiator key distribution: Sign (0x04)
Responder key distribution: EncKey (0x01)
< HCI Command: Read BD ADDR (0x04|0x0009) plen 0
[hci0] 315.165422
> HCI Event: Command Complete (0x0e) plen 10 [hci0] 315.165792
Read BD ADDR (0x04|0x0009) ncmd 1
Status: Success (0x00)
Address: B8:27:EB:15:50:70 (Raspberry Pi Foundation)
< ACL Data TX: Handle 64 flags 0x00 dlen 21
[hci0] 315.183781
SMP: Pairing Confirm (0x03) len 16
Confim value: 12e170d20c0bb8beb6d7c59bb006acd0
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 315.187419
Num handles: 1
Handle: 64
Count: 2
> ACL Data RX: Handle 64 flags 0x02 dlen 21 [hci0] 315.202330
SMP: Pairing Confirm (0x03) len 16
Confim value: 6e0be0cc5a8f08ffc98a88c25167aa2f
< ACL Data TX: Handle 64 flags 0x00 dlen 21
[hci0] 315.219695
SMP: Pairing Random (0x04) len 16
Random value: 25498f1cc873d7450460df3b5ce2ab7e
> ACL Data RX: Handle 64 flags 0x02 dlen 21 [hci0] 315.247316
SMP: Pairing Random (0x04) len 16
Random value: 9e7769acf6f4c19706f9abde25d4749f
< HCI Command: LE Start Encryption (0x08|0x0019) plen 28
[hci0] 315.256836
Handle: 64
Random number: 0x0000000000000000
Encrypted diversifier: 0x0000
Long term key: 7689a6b5371537b24f2c7c7805688df6
> HCI Event: Command Status (0x0f) plen 4 [hci0] 315.257310
LE Start Encryption (0x08|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Encryption Change (0x08) plen 4 [hci0] 315.337302
Status: Success (0x00)
Handle: 64
Encryption: Enabled with AES-CCM (0x01)
> ACL Data RX: Handle 64 flags 0x02 dlen 21 [hci0] 315.367776
SMP: Encryption Information (0x06) len 16
Long term key: b22ef80c481a8b4929e7159e0c2b0ba3
> ACL Data RX: Handle 64 flags 0x02 dlen 15 [hci0] 315.397264
SMP: Master Identification (0x07) len 10
EDIV: 0x02ee
Rand: 0x0720e828075f93eb
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 315.407288
Num handles: 1
Handle: 64
Count: 1
< ACL Data TX: Handle 64 flags 0x00 dlen 21
[hci0] 315.416056
SMP: Encryption Information (0x06) len 16
Long term key: ffeeddccbbaa99887766554433221100
< ACL Data TX: Handle 64 flags 0x00 dlen 15
[hci0] 315.425880
SMP: Master Identification (0x07) len 10
EDIV: 0x000c
Rand: 0x8877665544332211
< ACL Data TX: Handle 64 flags 0x00 dlen 21
[hci0] 315.433926
SMP: Signing Information (0x0a) len 16
Signature key: ffeeddccbbaa99887766554433221100
> ACL Data RX: Handle 64 flags 0x02 dlen 6 [hci0] 315.442266
SMP: Pairing Failed (0x05) len 1
Reason: Unspecified reason (0x08)
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 315.442543
Num handles: 1
Handle: 64
Count: 2
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 315.532771
Num handles: 1
Handle: 64
Count: 1
> HCI Event: Disconnect Complete (0x05) plen 4 [hci0] 315.532868
Status: Success (0x00)
Handle: 64
Reason: Remote User Terminated Connection (0x13)
