Interphone Upgrade

This instruction describe how to upgrade standard intercom, to allow you open the door by smartphone.

Step 1: Components Needed

  • ESP8266
  • PCB Adapter for ESP8266
  • Low-Dropout Linear Regulator LM1117 3.3V
  • Capacitor 10uF
  • Capacitor 100nF
  • Capacitor 100uF
  • Resistor 300R
  • Resistor 1K
  • 3x Resistor 10K (you can skip R2 and R3 resistors if you use PCB adapter)
  • Transistor BC547
  • Micro relay
  • 5V power supply
  • Universal PCB
  • Gold pins

Step 2: Schematic Diagram​

Connect all the components as per the schematic diagram

Step 3: Software

Flash ESP8266 using this firmware

Step 4: Installation

Open interphone case and connect relay to the electric lock trigger.


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    2 years ago

    Good idea. My interphone has video, would it be posible to sen video and/or audio to the smartphone too?