zunoSendWakeUpNotification()Sends wakeup notification to network controller. This starts transmission between slave & controller. If you need to apply settings, update firmware on sleeping device you have to send notification to controller. By default Z-Uno sends notification automatically when you wakeup it using button or when wakeup interval is triggered. This function provide a way to send wakeup notification anytime you need it. Function doesn't send notification immediately. It will send notification after zunoSendDeviceToSleep() is called.