ESP32-CONTROLLING LED BRIGHTNESS

ESP32-CONTROLLING LED BRIGHTNESS

Aim:

To vary the intensity of LED using potentiometer.

Description:

This experiment shows how to read an analog input value connected to onboard pot and display it on the serial monitor of the Arduino Software (IDE).

Hardware required:

ESP32-Microcontroller development board

Pin connection:

Pin Mapping:

Development Board	ESP32
Potentiometer	I034
LED	I05

Procedure:

1.        The above pin connection shows how to control the brightness of LED using potentiometer in ESP32 board.

2.        Do the connections as shown in the pin diagram and pin mapping.

3.        Connect the USB cable to the board.

4.        Open Arduino IDE .Select DOIT ESP32 DEVKIT V1in boards and select COM port.

5.        Verify the program and Upload it.

6.        Open the serial monitor to observe the values.

7.        Now using a screw driver rotate the potentiometer. The LED will be very bright at the highest point and low as you turn the potentiometer in the opposite direction.

Program:

void setup(void)

{

/* set baud rate */

Serial.begin(9600);

/* Initialize the input pin */ pinMode(34,INPUT);

/* Initialize the output pin */ pinMode(5,OUTPUT);

}

/* the loop function runs over and over again forever */ 
void loop(void)

{

int outputvalue=analogRead(34);

int value=map(outputvalue,0,1023,0,255); 
analogWrite(5,outputvalue);

/* Print a value on the serial monitor */ Serial.println(outputvalue); delay(1000);

}