Solved this issue. The remote device apparently disconnects depending on what is in the write request before. Don't bother any longer. On Mon, Aug 5, 2019 at 4:56 PM Axelle <aafortinet@xxxxxxxxx> wrote: > > I managed to pair, by a mix of factory reset + ensuring that other > devices previously paired were unpaired. > > Now, I can pair. However I continue to experience disconnections. Typically, > > - I connect, I pair > - I send a Write Request > - I receive a Write Response which looks > - Immediately after I also receive a Disconnect Complete with reason > "Remote User Terminated Connection". This is not meant to happen. > > Can I do something about this? > > This behaviour is exactly the same on two different hosts: Linux Mint, > and a Rpi 3. Using Bluez 5.50. > > < ACL Data TX: Hand.. flags 0x00 dlen 15 #47 [hci0] 2019-08-05 16:37:27.290456 > ATT: Write Request (0x12) len 10 > Handle: 0x0014 > Data: xxxxxxxxxxxxxxxx > > HCI Event: Number of C.. (0x13) plen 5 #48 [hci0] 2019-08-05 16:37:27.295258 > Num handles: 1 > Handle: 70 > Count: 1 > > ACL Data RX: Handl.. flags 0x02 dlen 5 #49 [hci0] 2019-08-05 16:37:27.324637 > ATT: Write Response (0x13) len 0 > > HCI Event: Disconnect... (0x05) plen 4 #50 [hci0] 2019-08-05 16:37:27.341258 > Status: Success (0x00) > Handle: 70 > > Reason: Remote User Terminated Connection (0x13) > > Thanks > > -- Axelle > > On Thu, Aug 1, 2019 at 4:10 PM Axelle <aafortinet@xxxxxxxxx> wrote: > > > > Hello list, > > > > I (again) face problems pairing with a BLE device. > > > > Using bluetoothctl (v5.50), I connected to the device (connect). Then > > I try to pair but it fails (org.bluez.Error.AuthenticationCanceled). > > The hcidump show a connection timeout. > > > > NB: > > - I have a registered agent (although I do not think it is useful in my case) > > - I am using Linux Mint 19.1. The same error occurs on a Raspberry Pi > > 3 with Raspbian. > > - I have some bluez distrib packages v5.48 installed. Can this be an issue? > > - I got this to work a while ago with the help of someone of bluez on > > IRC, doing power off/power on, but this is not working this time... > > > > Thanks > > > > -- Axelle > > > > What bluetoothctl says: > > > > [D2A74C76F3E0]# pair D2:A7:4C:76:F3:E0 > > Attempting to pair with D2:A7:4C:76:F3:E0 > > [CHG] Device D2:A7:4C:76:F3:E0 ServicesResolved: no > > [CHG] Device D2:A7:4C:76:F3:E0 Connected: no > > Failed to pair: org.bluez.Error.AuthenticationCanceled > > > > The corresponding hcidump shows that the connection times out: > > > > < ACL data: handle 71 flags 0x00 dlen 11 > > SMP: Pairing Request (0x01) > > capability 0x04 oob 0x00 auth req 0x2d > > max key size 0x10 init key dist 0x0d resp key dist 0x0f > > Capability: KeyboardDisplay (OOB data not present) > > Authentication: Bonding (MITM Protection) > > Initiator Key Distribution: LTK CSRK > > Responder Key Distribution: LTK IRK CSRK > > > HCI Event: Number of Completed Packets (0x13) plen 5 > > handle 71 packets 1 > > > HCI Event: Disconn Complete (0x05) plen 4 > > status 0x00 handle 71 reason 0x08 > > Reason: Connection Timeout
