1. DHT11 Sensor Connections:
   • Connect U1:VDD to A1:+5V_1.
   • Connect U1:GND to A1:GND1.
   • Connect U1:DATA to A1:2.
2. LED Connections:
   • Add a 220-ohm resistor with one end connected to digital pin 9 and the other end to the anode of the LED. However, the resistor is not listed in the project; I'll assume a placeholder R1 for clarity.
   • Connect R1:1 to A1:9.
   • Connect R1:2 to LED1:A.
   • Connect LED1:K to A1:GND1.

1. Power Connections:
   • Connect A1:5 (+5V_1) to U1:1 (VDD).
   • Connect A1:6 (GND1) to U1:4 (GND).
2. DHT11 Sensor:
   • Connect U1:2 (DATA) to a digital pin on the Arduino Mega 2560, for example, A1:4 (assuming this pin is configured correctly in your code).
3. LED Connection:
   • Connect the anode LED1:2 (A) to a series resistor (e.g., 220Ω) to limit the current and prevent the LED from burning out. Connect the other end of the resistor to a digital pin on the Arduino Mega 2560, for example, A1:13.
   • Connect the cathode LED1:1 (K) to A1:6 (GND1).

Cpp
#include <DHT.h>

#define DHTPIN 4           // DHT11 data pin connected to digital pin 4
#define DHTTYPE DHT11      // DHT 11 
#define LEDPIN 13          // LED connected to digital pin 13

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(LEDPIN, OUTPUT); // Set LED pin as output
  dht.begin();
}

void loop() {
  delay(2000); // Wait a few seconds between measurements
  float temperature = dht.readTemperature();
  
  if (temperature > 30) {
    digitalWrite(LEDPIN, HIGH); // Turn LED on
  } else {
    digitalWrite(LEDPIN, LOW);  // Turn LED off
  }
}

• The LED1 is a basic LED with a forward voltage of 1.85V.
• A typical resistor value of 220Ω is suggested for the LED.
• The data pin and LED pin numbers can be adjusted based on your specific design setup.