RFCOMM 连接被拒绝，因为 pin

Question

我在连接树莓派上的串口转蓝牙设备时遇到问题。

在 bluetoothctl 中，我扫描 ip 并尝试配对（在信任之后），但我被拒绝了，我从来没有收到过输入密码的提示。

我也试过了

rfcomm connect /dev/rfcomm1 <bt_addr> 1

我检查 hci 转储并查看 hci 事件

HCI Command: PIN Code request

然后在我看到的下面

HCI Command: PIN Code request Negative reply

但我从来没有选择放入我的别针。我已经连接到其他蓝牙设备没有这个问题，但由于某种原因我在这个项目上看到了这个enter link description here

我正在使用更新版本的 bluez，因此 hcid.conf 不再存在，不幸的是，我的大多数搜索都涉及该文件作为解决方案。如何使用最新的 bluez 版本解决此问题？当我尝试连接时，有没有办法注入该引脚？

我能够连接安卓设备和 Windows 操作系统并读取数据，但由于某种原因 linux 给了我一个问题

谢谢

Answer 1

您缺少在 bluetoothctl 中注册代理以进行提示。您可以按顺序尝试以下命令。

总之，

hciconfig hci0 up
systemctl start bluetooth
bluetoothctl
[bluetooth]# discoverable on
[bluetooth]# pairable on
[bluetooth]# agent NoInputNoOutput
[bluetooth]# scan on
[bluetooth]# scan off #after you found the device
[bluetooth]# trust 44:D8:84:02:A3:17
[bluetooth]# pair 44:D8:84:02:A3:17
[bluetooth]# connect 44:D8:84:02:A3:17

“agent”有多种可能的选项。检查以下日志。

root@mx6q:~# hciconfig    
hci0:   Type: BR/EDR  Bus: USB
    BD Address: 00:02:72:A9:B6:45  ACL MTU: 1021:7  SCO MTU: 64:1
    UP RUNNING PSCAN 
    RX bytes:1038 acl:0 sco:0 events:50 errors:0
    TX bytes:1405 acl:0 sco:0 commands:49 errors:0

root@mx6q:~# hciconfig hci0 up
root@mx6q:~# systemctl start bluetooth
root@mx6q:~# ps -ef | grep bluetooth
root       324     1  0 00:07 ?        00:00:00 /usr/lib/bluez5/bluetooth/bluetoothd
root       339   314  0 04:25 pts/0    00:00:00 grep bluetooth
root@mx6q:~# 
root@mx6q:~# bluetoothctl 
[NEW] Controller 00:02:72:A9:B6:45 BlueZ 5.33 [default]
[bluetooth]# discoverable on
Changing discoverable on succeeded
[CHG] Controller 00:02:72:A9:B6:45 Discoverable: yes
[bluetooth]# pairable on
Changing pairable on succeeded
[bluetooth]# agent 
DisplayOnly      DisplayYesNo     KeyboardDisplay  KeyboardOnly     NoInputNoOutput  off              on               
[bluetooth]# agent NoInputNoOutput 
Agent registered
[bluetooth]# scan on
Discovery started
[CHG] Controller 00:02:72:A9:B6:45 Discovering: yes
[NEW] Device 44:D8:84:02:A3:17 Parthiban
[bluetooth]# scan off
[CHG] Device 44:D8:84:02:A3:17 RSSI is nil
Discovery stopped
[CHG] Controller 00:02:72:A9:B6:45 Discovering: no
[bluetooth]# trust 44:D8:84:02:A3:17
[CHG] Device 44:D8:84:02:A3:17 Trusted: yes
Changing 44:D8:84:02:A3:17 trust succeeded
[bluetooth]# pair 44:D8:84:02:A3:17
Attempting to pair with 44:D8:84:02:A3:17
[CHG] Device 44:D8:84:02:A3:17 Connected: yes
[CHG] Device 44:D8:84:02:A3:17 Modalias: usb:v05ACp12A0d0930
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 00000000-deca-fade-deca-deafdecacafe
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 00001000-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 0000110a-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 00001116-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 0000111f-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 0000112f-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 00001132-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
[CHG] Device 44:D8:84:02:A3:17 Paired: yes
Pairing successful
[CHG] Device 44:D8:84:02:A3:17 Connected: no
[bluetooth]#