He reasoned that he could tap into the low-voltage side of the doorbell transformer and watch for the telltale fluctuations that would indicate the bell was doing its thing. The ESP8266 has an ADC ...
If you're in the market for one of the best video doorbells on the market ... It comes in at a relatively compact 6.19 cm x 2.30 cm x 12.65 cm (4.98 in x 2.44 in x 0.91 in), in either Satin ...