One such IoT devotee is [Sasa Karanovic], who writes in to tell us about his very impressive custom IoT LED dimmer based on the ESP8266. Rather than rely on a commercial lighting controller ...
If you already have a ton of smart home devices and you're wondering what to do next, I recommend picking up an ESP8266.
His meter might not have an LED, but it did have a magnet attached ... At regular intervals throughout the day, the ESP8266 polls the ATtiny13 to pull the stored sensor pulses and voltage measurement.