Aside from smart devices, Homey also supports a number of 'dumb' devices. Learn how to connect them in this article.
Unfortunately, Homey does not do magic, so devices do need a wireless control method.
For devices without wireless controls, like your trusted coffee machine or regular lights, workarounds are available. Add, for instance, a relatively cheap socket switch to these devices and include them in your Homey ecosystem without having to buy a completely new device!