The circuit in question is designed to integrate an ESP8266 NodeMCU microcontroller with an LCD I2C display, an RFID-RC522 module, a single-channel relay module, and a power supply module. The ESP8266 NodeMCU serves as the central processing unit, handling Wi-Fi connectivity, RFID card reading, and user interface display on the LCD. The RFID-RC522 is used for scanning RFID tags, while the relay module controls an AC power source to a socket. The Mini AC-DC converter module steps down AC voltage to 5V required by the microcontroller and other components. The AC source provides the primary power to the system.
#include <SPI.h>
#include <MFRC522.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP8266WiFi.h>
#include "User.h"
#include "LibHelper.h"
// ... (code truncated for brevity)
void setup() {
// Initialization code
}
void loop() {
// Main loop code
}
// ... (additional functions and logic truncated for brevity)
// LibHelper.h
#ifndef LIBHELPER_H
#define LIBHELPER_H
#include <Arduino.h>
#include <ArduinoJson.h>
class LibHelper {
public:
static String postRequest(String link, String body);
};
#endif
The implementation for LibHelper
is not provided in the input code. It is expected to contain the definitions for the declared functions in the header file.
This documentation provides an overview of the circuit, including a description of each component, wiring details, and the embedded code. The code is truncated for brevity, and it is assumed that the full implementation is available in the provided files.