The logic runs on an ESP8266 microcontroller instead of a Raspberry Pi Zero, all of which means the electronics inside can be purchased for less than €10. This

The logic runs on an ESP8266 microcontroller instead of a Raspberry Pi Zero, all of which means the electronics inside can be purchased for less than €10. This looks like the type of application which, if mass-produced, would have the electronics done on a $0.10 mask-programmed COB.