**Help needed with programming**

Projects Programming
1

Hey there !!!!
I am having a problem in the understanding this piece of code. Please help me to understand what this code does.

#include <Servo.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SoftwareSerial.h>

#define DHTPIN 2
#define DHTTYPE DHT11

#define OLED_RESET -1
Adafruit_SSD1306 display(OLED_RESET);

#define SERVO_PIN 9
Servo myservo;

DHT dht(DHTPIN, DHTTYPE);

SoftwareSerial BTSerial(4, 5); // RX, TX

const int ledPin = 13;
const int buttonPin = 3;
int buttonState = 0;
int previousButtonState = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  Serial.begin(9600);
  dht.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setCursor(0,0);
  display.println("Arduino Project");
  display.display();
  myservo.attach(SERVO_PIN);
  BTSerial.begin(9600);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(humidity);
  Serial.println("%");

  display.setCursor(0,16);
  display.print("Temp: ");
  display.print(temperature);
  display.print("C, Hum: ");
  display.print(humidity);
  display.display();

  int sensorValue = analogRead(A0);
  int servoPosition = map(sensorValue, 0, 1023, 0, 180);
  myservo.write(servoPosition);

  buttonState = digitalRead(buttonPin);
  if (buttonState != previousButtonState) {
    if (buttonState == HIGH) {
      digitalWrite(ledPin, HIGH);
      BTSerial.write("LED ON");
    } else {
      digitalWrite(ledPin, LOW);
      BTSerial.write("LED OFF");
    }
    previousButtonState = buttonState;
  }

  delay(2000);
}
2

What previous example would that be and where did you get the sketch from ?

The explanation of what it does is in bullet points 1 to 8 of your post

What more do you need to know ?

3

When the assignment is due.

4

What is the task description you received from your teacher.

5

@UKHeliBob
Which points are you talking about sir?

6

@paulpaulson
my teacher told me to identify the real use of this code.

7

@anon56112670
assignment is due to Be submitted on the next Monday.

8

Why did you have modified the starting post?

9

The ones that you deleted from your original post soon after posting it

10

you removed this from your first post

There is a brief hint for you all

This program builds upon the previous example and includes even more features:

  1. It includes the Servo library, which allows the program to control a servo motor.
  2. It includes the Adafruit_SSD1306 library, which allows the program to display text on an OLED screen.
  3. It defines several additional constants, including the servo pin and OLED reset pin.
  4. In the setup function, it initializes the OLED screen, servo motor, and Bluetooth communication.
  5. In the loop function, it reads the temperature and humidity values from the DHT sensor and displays them on the OLED screen.
  6. It reads the value from a potentiometer connected to analog pin 0 and maps the value to a servo position, which it then sets using the myservo.write() function.
  7. It reads the state of a button connected to the Arduino and turns on or off the LED depending on the button state. It also sends a message over Bluetooth to indicate the LED state.
  8. The program includes a 2-second delay between each loop iteration.

Overall, this program demonstrates how to incorporate multiple sensors, displays, and communication modules into an Arduino project, while still maintaining good coding practices such as modular code organization, meaningful variable names, and comments

11

You are looking for a use case?

It´s a weatherstation with controlled flaps and remote controlled illumination maybe?

12

actually not controlled, just status is shared (over BT probably)

and with a button that will be a pain to use (because of the 2s delay at the end of the loop)

2 Likes
13

@J-M-L , @UKHeliBob and @paulpaulson
Sire, I would like to classify that it was a mistake that had been taken from another text. It does not relate to the post, so I deleted it.

14

No - it does describe exactly what the code does.

seems you got the answer to your question from somewhere

15

from chatBot....

16

Why did you decide to ask the forum rather than make YOUR assignment yourself? What will be point of your learning if all your assignments will be done by somebody, but not you?

17

@b707
Actually,
it is not kind of an assignment, it is more like my teacher needed help from me. And I was not able to figure it out

So I would like to request you to not to give moral science classes here.

and I would also like to ask that what is 'Chatbot'

18

well

long story short the text that you removed describes what the code does.

19

Google's your friend. "Chatbot"

20

I´m out.

Have a nice day and enjoy coding in C++.