Please try the following steps:
Power off the device(unplug the power adapter)
Wait for 2 seconds, replug the power back in
Wait for 3 minutes for the device to start up
Press the reset button for less than 1 seconds to do a soft reset
Wait for 5 seconds. This should set the light to slow blinking.
Then you can go to the Netro app -> settings-> controller -> change wifi network/password.
If it still does not work. Please contact through email@example.com