@Solla-topee 

sure I can try and do this work for you (which additional time lost for me and my job). The problem is, even if there's an issue with my router of wifi, it didn't affect any of my other devices. I have three laptops, twp mobile phones, a dozen Philips Hue lamps, An EightSleet and many other smart connected devices. None of them was impacted and they still operate just fine. I will try this when I can, but this is clearly a Tapo issue.