raspberrypi 到 raspberrypi /bluetooth/errorcode 111，连接被拒绝

Question

I'm studying rasp pi3 b+

I want to communication rasp pi - rasp pi by Bluetooth

already set pair, connect each other in cmd ( a strange situation: (command)scan on >Relative address doesn't appear, but pair add, connect add is a success)

and

I entered the cording as below

From Bluetooth import*

client_socket=BluetoothSocket(RFCOMM)
client_socket.connect(("Add , port"))

while True:
      msg = client_socket.recv(1024)
      print("receive msg: {}".format(msg))
client_socket.close()

    enter code here
    enter code here
    enter code here

----------------

another one

same ...
while True:
      msg=raw_input("send")
      print(msg)
      clinet_socket.send(msg)
client_socket.close()

after input "python filename.penter code herey " in cmd

error occurred

bluetooth.btcommon.BluetoothError: (111, "connection refused')

help me plz...

Answer 1

What is the device on the other end of the link?

Does the remote device support RFCOMM or Serial Port Profile (SPP)?

You can see the list of services for the remote device with:

bluetoothctl info <mac_address_of_remote_Device>