I fail to understand what is happening here and I would appreciate your help.
I'm able to see my nearby device (NRF51822DK) with the "scan on" command.
However when calling "connect F1:6F:DE:EC:F1:D6" from bluetoothctl, I
get a "connect failed" error...
And from times to times, it magically works... meaning it gets a
connect failed but eventually create a connection with a single
"connect" command by the way.
Here's a btmon trace below.
Bluetooth monitor ver 5.35
= New Index: A4:17:31:78:A6:04 (BR/EDR,USB,hci0)
[hci0] 0.753884
< HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
[hci0] 22.180529
Type: Passive (0x00)
Interval: 60.000 msec (0x0060)
Window: 30.000 msec (0x0030)
Own address type: Public (0x00)
Filter policy: Ignore not in white list (0x01)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 22.181008
LE Set Scan Parameters (0x08|0x000b) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
[hci0] 22.181041
Scanning: Enabled (0x01)
Filter duplicates: Enabled (0x01)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 22.182008
LE Set Scan Enable (0x08|0x000c) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 36 [hci0] 22.264099
LE Advertising Report (0x02)
Num reports: 1
Event type: Connectable undirected - ADV_IND (0x00)
Address type: Random (0x01)
Address: F1:6F:DE:EC:F1:D6 (Static)
Data length: 24
Flags: 0x05
LE Limited Discoverable Mode
BR/EDR Not Supported
Name (complete): Espruino NRF51822DK
RSSI: -49 dBm (0xcf)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
[hci0] 22.264224
Scanning: Disabled (0x00)
Filter duplicates: Disabled (0x00)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 22.265029
LE Set Scan Enable (0x08|0x000c) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create Connection (0x08|0x000d) plen 25
[hci0] 22.265139
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: F1:6F:DE:EC:F1:D6 (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] 22.266017
LE Create Connection (0x08|0x000d) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create Connection Cancel (0x08|0x000e) plen 0
[hci0] 24.269467
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 24.271009
LE Create Connection Cancel (0x08|0x000e) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 19 [hci0] 24.272993
LE Connection Complete (0x01)
Status: Unknown Connection Identifier (0x02)
Handle: 32
Role: Master (0x00)
Peer address type: Random (0x01)
Peer address: F1:6F:DE:EC:F1:D6 (Static)
Connection interval: 67.50 msec (0x0036)
Connection latency: 0.00 msec (0x0000)
Supervision timeout: 420 msec (0x002a)
Master clock accuracy: 0x00
@ Connect Failed: F1:6F:DE:EC:F1:D6 (2) status 0x02
< HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
[hci0] 24.282482
Type: Passive (0x00)
Interval: 60.000 msec (0x0060)
Window: 30.000 msec (0x0030)
Own address type: Public (0x00)
Filter policy: Ignore not in white list (0x01)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 24.282992
LE Set Scan Parameters (0x08|0x000b) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
[hci0] 24.283021
Scanning: Enabled (0x01)
Filter duplicates: Enabled (0x01)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 24.283990
LE Set Scan Enable (0x08|0x000c) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 36 [hci0] 26.283994
LE Advertising Report (0x02)
Num reports: 1
Event type: Connectable undirected - ADV_IND (0x00)
Address type: Random (0x01)
Address: F1:6F:DE:EC:F1:D6 (Static)
Data length: 24
Flags: 0x05
LE Limited Discoverable Mode
BR/EDR Not Supported
Name (complete): Espruino NRF51822DK
RSSI: -46 dBm (0xd2)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
[hci0] 26.284088
Scanning: Disabled (0x00)
Filter duplicates: Disabled (0x00)
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 26.284989
LE Set Scan Enable (0x08|0x000c) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create Connection (0x08|0x000d) plen 25
[hci0] 26.285068
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: F1:6F:DE:EC:F1:D6 (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] 26.285982
LE Create Connection (0x08|0x000d) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create Connection Cancel (0x08|0x000e) plen 0
[hci0] 28.289490
> HCI Event: Command Complete (0x0e) plen 4 [hci0] 28.290991
LE Create Connection Cancel (0x08|0x000e) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 19 [hci0] 28.292966
LE Connection Complete (0x01)
Status: Unknown Connection Identifier (0x02)
Handle: 32
Role: Master (0x00)
Peer address type: Random (0x01)
Peer address: F1:6F:DE:EC:F1:D6 (Static)
Connection interval: 67.50 msec (0x0036)
Connection latency: 0.00 msec (0x0000)
Supervision timeout: 420 msec (0x002a)
Master clock accuracy: 0x00
@ Connect Failed: F1:6F:DE:EC:F1:D6 (2) status 0x02
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