Object Detection using IR Sensor and NodeMCU ESP8266

In this article we will implement object detection using IR sensor and NodeMCU ESP8266. If your are new to Internet of Things (IoT), learn about IoT by visiting our Internet of Things tutorial for beginners.

Watch this video to learn about object detection using IR sensor and NodeMCU:

Aim of Experiment

To implement object detection using IR sensor.

Components Required

• NodeMCU – 1
• LED – 1
• 330 Ω Resistor – 2
• Active IR Sensor – 1
• Active Buzzer – 1
• Breadboard – 1

Connections Diagram (Schematic)

Code (C++/Arduino IDE)

//Set the pins for IR sensors, LED and Buzzer
const int IR_pin = D1;
const int LED_pin = D0;
const int Buzzer_pin = D3;
int value = 0;

void setup() {
  // put your setup code here, to run once:
  //Set the pin mode for IR sensor, LED and Buzzer
  pinMode(IR_pin, INPUT);
  pinMode(LED_pin, OUTPUT);
  pinMode(Buzzer_pin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  //Read the value of IR sensor
  value = digitalRead(IR_pin);
  if(value == 1)
  {
    //Turn the LED on
    digitalWrite(LED_pin, HIGH);
    //Play the buzzer with 1KHz sound
    tone(Buzzer_pin, 1000);
  }
  else
  {
    //Turn off LED
    digitalWrite(LED_pin, LOW);
    //Turn off Buzzer
    noTone(Buzzer_pin);
  }
  delay(100);
}

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.