w4ilun / ESP8266-Intercom

Using an ESP8266 and a 2-channel relay to control a 4-wire intercom

MIT License

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ESP8266 Intercom

Fritzing

An ESP8266 is connected to a 2-channel relay module.

Channel 1 controls the door, with the relay closed for 2 seconds only
Channel 2 controls the buzzer, it polls a time server every 30 seconds to get the current time. The buzzer is set to on or off based on the "start time" and "end time"