I am trying to connect two raspberry pi via Bluetooth these days. The Bluetooth I use is the Plugable USB Bluetooth. I want to set one pi to receive data sent from the other one so it can plot the data dynamically. However, I followed some instructions online and failed to make it. Here is my method:

  1. Install everything needed including bluez, blueman, etc.
  2. Modified /etc/bluetooth/rfcomm.conf like:
    # RFCOMM configuration file.
    rfcomm0 {
     # Automatically bind the device at startup
     bind yes;
    # Bluetooth address of the device
     device XX:XX:XX:XX:XX:XX;
    # RFCOMM channel for the connection
     channel 1;
    # Description of the connection
     comment "XXX";
  1. Type "rfcomm connect 0" on the pi that is going to send data. (I even try typing "rfcomm listen 0" on the receiving side.)

However, every time I only get "Can't connect RFCOMM socket: Connection refused". Can anyone help me with this problem? I managed to send data from PC to gumstix before using blueman in Ubuntu but this time is different. Thanks!

  • are you running as root? i.e. sudo <command>
    – rob
    Mar 4, 2015 at 7:43
  • Hello rob, I did run as root. I search it online and I guess it may have something to do with the pincodes file. However, I make one but it still does not work. Maybe I am missing some steps. I will try more after I finish my dues before spring break... If the problem can be solved before that, it will be fantastic. Thank you for your reply.
    – funnytao
    Mar 5, 2015 at 14:08

1 Answer 1


Look at this link is a present to connection 2 raspberry in Serial Port Profile in Bluetooth ;) https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=181682

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