Cirkit Designer LogoCirkit DesignerYour all-in-one circuit design IDE Launch Cirkit Designer App

NodeMCU ESP8266-Based Smart Lift System with IR Sensors and Voice Commands

View and Edit Project In Cirkit DesignerImage of NodeMCU ESP8266-Based Smart Lift System with IR Sensors and Voice Commands

Circuit Documentation

Summary

This circuit is an IoT-based smart lift system designed for blind and disabled individuals. It integrates various components such as IR sensors, pushbuttons, an LCD screen, a DFPlayer module, and a VC-02 module to provide floor information and voice input capabilities. The IR sensors detect finger presence, and the system announces the corresponding floor through the speaker and displays it on the LCD. Voice commands can also be given to select a floor.

Component List

  1. VC-02 Module

    • Pins: NC, TCK OR IOB0, TMS OR IOB1, GND, Vcc, DAC_L, DAS_R, 3.3V O, SDA_5V, SCL_5V, SDA OR IOB3, SCL OR IOB2, IOA27, IOB8, RX(IOB6), TX(IOB7)
    • Description: Voice command module

  2. IR Sensor

    • Pins: out, gnd, vcc
    • Description: Infrared sensor for detecting finger presence

  3. DFPlayer MINI

    • Pins: VCC, BUSY, RX, USB -, TX, USB +, DAC_R, K2/ADC_KEY, DAC_L, K1/ADC_KEY, SPK1, IO 2, GND, SPK2, IO 1
    • Description: MP3 player module

  4. NodeMCU V3 ESP8266

    • Pins: A0, GND, VU, S3, S2, S1, SC, S0, SK, 3V3, EN, RST, Vin, D0, D1, D2, D3, D4, D5, D6, D7, D8, RX, TX
    • Description: Microcontroller for IoT applications

  5. Resistor (1k Ohms)

    • Pins: pin1, pin2
    • Description: Resistor with 1k Ohms resistance

  6. Resistor (10k Ohms)

    • Pins: pin1, pin2
    • Description: Resistor with 10k Ohms resistance

  7. Speaker

    • Pins: +, -
    • Description: Speaker for audio output

  8. Condenser Microphone

    • Pins: pin1, pin2
    • Description: Microphone for audio input

  9. Loudspeaker

    • Pins: pin1, pin2
    • Description: Loudspeaker for audio output

  10. LCD Screen 16x2 I2C

    • Pins: SCL, SDA, VCC, GND
    • Description: LCD screen for displaying information

  11. Pushbutton

    • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)
    • Description: Pushbutton for user input

Wiring Details

VC-02 Module

IR Sensor (1)

IR Sensor (2)

DFPlayer MINI

NodeMCU V3 ESP8266

Resistor (1k Ohms)

Resistor (10k Ohms) (1)

Resistor (10k Ohms) (2)

Speaker

LCD Screen 16x2 I2C

Pushbutton (1)

Pushbutton (2)

Documented Code

NodeMCU V3 ESP8266 Code

/*
 * IoT-Based Smart Lift System for Blind and Disabled Individuals
 * This code interfaces with IR sensors, pushbuttons, an LCD screen, a DFPlayer
 * module, and a VC-02 module to provide floor information and voice input
 * capabilities. The IR sensors detect finger presence, and the system announces
 * the corresponding floor through the speaker and displays it on the LCD.
 * Voice commands can also be given to select a floor.
 */

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>

// Pin definitions
#define IR_SENSOR_1_PIN D0
#define IR_SENSOR_2_PIN D2
#define BUTTON_1_PIN D6
#define BUTTON_2_PIN D8
#define LCD_SDA_PIN D5
#define LCD_SCL_PIN D7
#define VC02_RX_PIN D3
#define VC02_TX_PIN D4
#define DFPLAYER_RX_PIN TX
#define DFPLAYER_TX_PIN RX

// LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2);

// DFPlayer setup
SoftwareSerial dfPlayerSerial(DFPLAYER_RX_PIN, DFPLAYER_TX_PIN);

// VC-02 setup
SoftwareSerial vc02Serial(VC02_RX_PIN, VC02_TX_PIN);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  dfPlayerSerial.begin(9600);
  vc02Serial.begin(9600);

  // Initialize LCD
  lcd.begin();
  lcd.backlight();

  // Initialize pins
  pinMode(IR_SENSOR_1_PIN, INPUT);
  pinMode(IR_SENSOR_2_PIN, INPUT);
  pinMode(BUTTON_1_PIN, INPUT);
  pinMode(BUTTON_2_PIN, INPUT);

  // Welcome message
  lcd.setCursor(0, 0);
  lcd.print("Smart Lift System");
  delay