Where should I connect Ezlo Atom?

You can plug in Ezlo Atom about anywhere there’s a USB port to power it (note: the power supply requirement is 5V/1A). Assuming you want the controller on at all times so as to be able to control your devices, it’s best to keep it plugged into something that’s always connected to electricity, such as an appliance or a USB power adapter that you can leave plugged in.