I am trying to connect to an Android device with Marshmallow for wireless debugging.
C:\...\sdk\platform-tools>adb connect 192.168.1.103:5555
unable to connect to 192.168.1.103:5555: cannot connect to 192.168.1.103:5555:
No connection could be made because the target machine actively refused it. (10061)
adb connect "192.168.1.103:5556"
"adb connect 192.168.1.103"
I am also using the One Plus two and updated to marshmallow 2 weeks ago . i have the same issue
try to kill your adb sever then try again .
you should use 5556 port number not 5555 anymore
if its not working connect your phone via usb cable then restart the adb into wireless mode
adb tcpip 5556
then try to connect your phone with the port no 5556 (eg ip:5556) after connected you can remove your usb cable
it worked for me