我在服务器中监听蓝牙连接：
rfcomm listen rfcomm1 1
然后我连接我的蓝牙客户端并显示以下消息：
Connection from XX:XX:XX:XX:XX:XX to /dev/rfcomm1 Press CTRL-C for hangup
这意味着一切都好……
然后我通过在服务器或客户端中执行Ctrl C来完成连接.
在此之后,我又做了一次：
rfcomm listen rfcomm1 1
但这次,当我连接客户端时,我收到此消息：
Can't create RFCOMM TTY: Address already in use
所以我去检查哪些连接是打开的：
rfcomm -a
rfcomm1: XX:XX:XX:XX:XX:XX -> XX:XX:XX:XX:XX:XX channel 1 closed [reuse-dlc release-on-hup ]
最奇怪的是,有时断开连接是成功的,我可以毫无问题地重新连接.
EDIT@H_403_33@
我意识到当设备保持连接大约10秒或更长时间时,断开连接成功.但是当此时间较短(快速连接/断开)时,会出现问题.
如果失败发生,我会这样做：
dmesg
打印出来：
[11800.001527] Bluetooth: TIOCGSERIAL is not supported [11800.033063] Bluetooth: TIOCGSERIAL is not supported [11926.708438] Bluetooth: TIOCGSERIAL is not supported [11934.918197] Bluetooth: TIOCGSERIAL is not supported [11934.926194] Bluetooth: TIOCGSERIAL is not supported [11934.926284] ------------[ cut here ]------------ [11934.926297] WARNING: cpu: 1 PID: 2316 at /build/linux-Pcn0xK/linux-4.4.0/drivers/tty/tty_port.c:143 tty_port_destructor+0x7a/0x80() [11934.926300] Modules linked in: minidriver(OE) nls_utf8 isofs rfcomm bnep arc4 ath5k snd_hda_codec_realtek uvcvideo ath mac80211 snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel videobuf2_vmalloc snd_hda_codec samsung_laptop videobuf2_memops snd_hda_core btusb videobuf2_v4l2 btrtl snd_hwdep videobuf2_core coretemp btbcm cfg80211 snd_pcm v4l2_common btintel snd_seq_midi joydev videodev bluetooth snd_seq_midi_event serio_raw media snd_rawmidi input_leds snd_seq snd_seq_device snd_timer snd soundcore shpchp lpc_ich mac_hid binfmt_misc parport_pc ppdev lp parport autofs4 hid_logitech ff_memless uas usb_storage hid_generic usbhid hid amdkfd amd_iommu_v2 radeon psmouse pata_acpi i2c_algo_bit ttm sky2 drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops video fjes drm [last unloaded: minidriver] [11934.926401] cpu: 1 PID: 2316 Comm: kworker/1:1 Tainted: G W OE 4.4.0-97-generic #120-Ubuntu [11934.926404] Hardware name: SAMSUNG ELECTRONICS CO.,LTD. R520/R522/R620 /R520/R522/R620,BIOS 05LL.M025.20090916.Jay 09/16/20 [11934.926410] Workqueue: events release_one_tty [11934.926413] 0000000000000286 c977cef9c84bca31 ffff88012ea3fd48 ffffffff813fabe3 [11934.926419] 0000000000000000 ffffffff81d386c0 ffff88012ea3fd80 ffffffff810812e2 [11934.926425] ffff8800b5153800 ffff8800b67f6400 ffff8800b67f6400 ffffffffc06dc840 [11934.926430] Call Trace: [11934.926438] [<ffffffff813fabe3>] dump_stack+0x63/0x90 [11934.926445] [<ffffffff810812e2>] warn_slowpath_common+0x82/0xc0 [11934.926450] [<ffffffff8108142a>] warn_slowpath_null+0x1a/0x20 [11934.926455] [<ffffffff8150357a>] tty_port_destructor+0x7a/0x80 [11934.926460] [<ffffffff81503ce8>] tty_port_put+0x28/0x30 [11934.926471] [<ffffffffc06d5fa8>] rfcomm_tty_cleanup+0x68/0x70 [rfcomm] [11934.926475] [<ffffffff814f91fb>] release_one_tty+0x3b/0xc0 [11934.926481] [<ffffffff8109a635>] process_one_work+0x165/0x480 [11934.926486] [<ffffffff8109a99b>] worker_thread+0x4b/0x4c0 [11934.926491] [<ffffffff8109a950>] ? process_one_work+0x480/0x480 [11934.926496] [<ffffffff810a0c75>] kthread+0xe5/0x100 [11934.926500] [<ffffffff810a0b90>] ? kthread_create_on_node+0x1e0/0x1e0 [11934.926507] [<ffffffff81843b8f>] ret_from_fork+0x3f/0x70 [11934.926511] [<ffffffff810a0b90>] ? kthread_create_on_node+0x1e0/0x1e0 [11934.926515] ---[ end trace a33c33d1fdbe410d ]--- [11936.001325] Bluetooth: TIOCGSERIAL is not supported [11936.033194] Bluetooth: TIOCGSERIAL is not supported
当一切正常(10秒或更长时间)时,只显示以下消息：
[11936.001325] Bluetooth: TIOCGSERIAL is not supported [11936.033194] Bluetooth: TIOCGSERIAL is not supported [11936.001325] Bluetooth: TIOCGSERIAL is not supported [11936.033194] Bluetooth: TIOCGSERIAL is not supported
解决方法
你试过使用发布吗？
sudo rfcomm release 0
或者直接将设备添加到/ etc / bluetooth / rfcomm中,然后将其绑定,然后在完成后尝试发布.
sudo rfcomm bind 0
