I'm running a Raspberry Pi with Raspbian Wheezy. I have a BT (Bluetooth) dongle attached to one of the USB ports (I have a model B RPi), I've downloaded and installed the following packages: bluez-utils, blueman, bluetooth and libbluetooth-dev, and all works fine.

But I have a question: is it possible to disable the PIN request on my RPi side when I try to connect from a mobile phone?

I know how to configure the PIN for the mobile phone, but I don't want my RPi asking for a PIN to pair the mobile phone.

2 Answers 2


Here is an approach, which I found to have worked.

  • ps aux | grep applet (identify the blueman process) and then kill it. This will kill the GUI application. This has to done on every reboot.

  • Open the /usr/bin/bluez-simple-agent and change KeyboardDisplay or DisplayYesNo (based on whatever you have there) to NoInputNoOutput. Run bluez-simple-agent in background and foreground.

  • Although reboot is not essentially needed from my experience it is advisable.

Hope this solves your problem.


Take a look at the section on pairing a device with your computer in this article titled: Bluetooth Headset - ArchLinux Wiki for tips on how to do this. I do not have a bluetooth device to confirm this but the steps described there may work for you as well.


  • Thank you @sim, but where is that file located? I think that it is no longer used, at least in Raspbian... bugs.debian.org/cgi-bin/bugreport.cgi?bug=539555
    – neutrino
    Feb 19, 2014 at 15:56
  • @neutrino - Sorry about that, it does appear to be obsolete. I'll continue to look.
    – slm
    Feb 19, 2014 at 15:59
  • Thank you again, @sim. But unfortunately, the device I am using does not allow incoming connections. It is designed to search and connect to any device supporting the SPP profile, with a given service name. And hence the problem: the BlueZ stacks ask the device for a PIN, and the device is not prepared to send it.
    – neutrino
    Feb 19, 2014 at 16:20
  • 2
    If you are using bluez-simple-agent, add capability=NoInputNoOutput in the file, will work only for 2.1 and above devices, also check link as well
    – ashish
    Feb 20, 2014 at 9:33
  • @ashish Thanks! But this command: /usr/local/bin/simple-agent fail with the message: Can't set Simple Pairing mode on hci0: Input/output error (5)
    – neutrino
    Feb 20, 2014 at 13:34

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