This project implements a distributed door access control system using multiple ESP8266 nodes communicating over MQTT.

System Overview

The system consists of three ESP8266 nodes:

• ESP1 – RFID & Motion Handles RFID authentication, LCD feedback, and motion sensing.
• ESP2 – Keypad Handles PIN entry and reports keypad interaction.
• ESP3 – Door Actuator Controls the door lock servo, LEDs, and buzzer.

A shared WiFiMqttClient library provides a unified abstraction for WiFi and MQTT communication.

The pin maps of ESP2866MOD: https://lastminuteengineers.com/esp8266-pinout-reference/