My smarrthub has worked for 2 years and I have made no changes to my network. The hub now goes offline. I have reset my router and smarthub. Cycled the router on first, plugged the smarthub back into router and then powered up the smarthub. It will return me back on line for about 24 hours and then drops off line again. This has happened 3 or 4 times. Any suggestions.