For any reason, adb (via Wifi) cannot connect to device with error:
unable to connect to <ip address>:<port>
Try to restarts the adbd (on device) daemon listening on TCP on the specified port, by running adb command tcpip, with USB connected to device.
$ ./adb tcpip 5555
then connect again.
$ ./adb connect 192.168.1.111
- Setup Android adb for Wifi debug