Ubuntu/Windows下免PIN码配对noinputnooutput远程蓝牙设备

阿华AIGC实验室

2026-5-25

Got it, let's tackle this head-on. When pairing a Bluetooth device set to noinputnooutput (no keyboard or display), the default PIN-based flow just won't cut it. Here's how to enable PIN-less pairing on both Ubuntu 17.10 and Windows:

Ubuntu 17.10 配置方法

First, make sure the Bluetooth service is running:
```
sudo systemctl start bluetooth
```
Launch the Bluetooth command-line tool:
```
bluetoothctl
```
Initialize the Bluetooth controller:
```
power on
agent on
default-agent
```
Start scanning for your target device to get its MAC address (look for your device name in the scan results):
```
scan on
```
Once you have the MAC address (e.g., AA:BB:CC:DD:EE:FF), first trust the device, then attempt pairing directly—this skips the PIN prompt for devices with no IO capabilities:
```
trust AA:BB:CC:DD:EE:FF
pair AA:BB:CC:DD:EE:FF
```
If the above still triggers a PIN request, modify the Bluetooth security config:
1. Open the main config file with a text editor:
```
sudo nano /etc/bluetooth/main.conf
```
2. Find the Security line, uncomment it, and set it to:
```
Security = none
```
3. Save the file (Ctrl+O, then Enter) and exit (Ctrl+X), then restart the Bluetooth service:
```
sudo systemctl restart bluetooth
```
4. Repeat the pairing steps in bluetoothctl again.
Note: Setting Security = none reduces Bluetooth security, so revert this change after pairing if you don't need it for other devices.

Windows 系统配置方法

First, update your Bluetooth adapter drivers: Outdated drivers often don't support PIN-less pairing for no-input/no-output devices. Head to your adapter manufacturer's website to grab the latest drivers and install them.
Check adapter advanced settings:
1. Open Device Manager (right-click Start Menu → Device Manager).
2. Expand the "Bluetooth" section, right-click your adapter, and select "Properties".
3. Go to the "Advanced" tab—look for an option like "Allow PIN-less pairing" or "Support noinputnooutput devices" and enable it. The exact wording varies by adapter.
Registry tweak (if no adapter setting exists):
1. Press Win+R, type regedit, and hit Enter to open the Registry Editor.
2. Navigate to this path:
```
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BTHPORT\Parameters
```
3. Right-click the Parameters folder, select "New → DWORD (32-bit) Value", and name it DisableNoInputNoOutput.
4. Double-click the new value, set "Value data" to 0 (0 = allow PIN-less pairing, 1 = disable), then click OK.
5. Restart your PC, then try pairing the device again.
Alternative quick test: When the PIN prompt pops up during pairing, click "Skip" or "Cancel"—some Windows setups will automatically fall back to PIN-less pairing if the device advertises noinputnooutput capabilities.