Nanoclick is a small IOT device which contains of only one button for interaction. It can control every smart device which you can think of. Wifi is provided by the ESP8285 mcu. The best part of it is, that it doesn't make use of the deep sleep functionality, which results in awesome battery lifetime. For more informations to the device, you can check out my Octoclick post, which is the same with just three buttons instead of one. There will be an own post once the project is completed. https://makermoekoe.com/2020/04/28/a-dashbutton-for-the-internet-of-things-called-octoclick/