Just a quick post today about how I replaced our doorbell with a custom Zigbee button and Home Assistant, running on an old Raspberry Pi 2 I had sitting in a drawer, which pings our phones when someone presses the button, instead of ringing a regular chime. If this interests you, read on! Whyyy? Good question! Our cat Harry, who we adopted from the shelter a couple of years ago, is terrified of all humans except us.