Notes

#include <DHT.h>

#define DHTPIN 13 // Pin connected to the DHT11 sensor
#define DHTTYPE DHT11 // Type of the sensor

DHT dht(DHTPIN, DHTTYPE);

// Array to store the segments for displaying digits 0-9
const byte segments[10] = {
B11111100, // 0
B01100000, // 1
B11011010, // 2
B11110010, // 3
B01100110, // 4
B10110110, // 5
B10111110, // 6
B11100000, // 7
B11111110, // 8
B11110110 // 9
};

// Pins connected to the segments of the display
const int segmentPins[7] = {3, 4, 5, 6, 7, 8, 9};

void setup() {
// Start communication with the temperature sensor
Serial.begin(9600);
dht.begin();

// Initialize the display pins as outputs
for (int i = 0; i < 7; i++) {
pinMode(segmentPins[i], OUTPUT);
}
}

void loop() {
// Read temperature and humidity from the DHT11 sensor
float temperatureC = dht.readTemperature();
float humidity = dht.readHumidity();

// Display temperature and humidity on 7-segment display
displayTemperature(temperatureC);
displayHumidity(humidity);

// Print temperature and humidity to serial monitor
Serial.print("Temperature: ");
Serial.print(temperatureC);
Serial.print(" °C, Humidity: ");
Serial.print(humidity);
Serial.println(" %");

delay(2000); // Wait for a short duration
}

void displayDigit(int digit, int value) {
// Turn off all segments
for (int i = 0; i < 7; i++) {
digitalWrite(segmentPins[i], LOW);
}

// Turn on segments based on the value to display
byte segmentsToDisplay = segments[value];
for (int i = 0; i < 7; i++) {
digitalWrite(segmentPins[i], bitRead(segmentsToDisplay, i));
}

// Enable the corresponding digit
digitalWrite(segmentPins[digit], HIGH);
}

void displayTemperature(float tempC) {
int tempInt = int(tempC);

int tensDigit = tempInt / 10; // Get the tens digit
int onesDigit = tempInt % 10; // Get the ones digit

// Display digits on the 7-segment display
displayDigit(1, tensDigit); // Display tens digit on the leftmost segment
displayDigit(0, onesDigit); // Display ones digit on the rightmost segment
}

void displayHumidity(float humidity) {
// Convert humidity to integer
int humidityInt = int(humidity);

int tensDigit = humidityInt / 10; // Get the tens digit
int onesDigit = humidityInt % 10; // Get the ones digit

// Display digits on the 7-segment display
displayDigit(5, tensDigit); // Display tens digit on the leftmost segment
displayDigit(4, onesDigit); // Display ones digit on the rightmost segment
}