To interface motor using relay with Node MCU ESP8266 and write a program to ‘turn ON’ motor when push button is pressed.

 Objecti ve:  To interface motor using relay with Node MCU ESP8266 and write a program to ‘turn ON’ motor when push button is pressed.

 

 

 Code:

 

#include <ESP32Servo.h>

int buttonpin= 13;

int relaypin = 2;

int last_state= HIGH;

long pos=0;

 

Servo myservo;  // Create Servo object to control servo long pos = 0;   //var to store servo position

void setup()

{

   Serial.begin(115200);                  

       pinMode(buttonpin,INPUT_PULLUP);

    pinMode(relaypin, OUTPUT);

    myservo.attach(5);    // attaches the servo on pin 9 to the servo object

}

 

void loop() {

int value=digitalRead(buttonpin); if(last_state!=value)

{

          last_state=value;    

if(value==HIGH)

{

digitalWrite(relaypin,LOW); Serial.println("released"); for(pos=0;pos<=180;pos+=1)

{

        myservo.write(pos);  

        delay(15);

}

for(pos=180;pos>=0;pos-=1)

{

    myservo.write(pos); delay(15);

}

}

else{

digitalWrite(relaypin,HIGH);

Serial.println("pressed");

}

}

}

 

 

 

 

 Output: