DHT11 Digital Temperature and Humidity Sensor Module

Description

Digital Temperature and Humidity Sensor Module DHT11

Tutorial: How to Use DHT11

The DHT11 is a digital sensor for measuring temperature and humidity. Ideal for humidity and temperature projects.

What you need

• DHT11
• Arduino
• Pull-up Resistor (10kΩ)
• Power Cable

Steps

1. 1. Assemble the DHT11: Connect VCC to 5V, GND to GND, and DATA to a digital pin on Arduino.
2. 2. Add a pull-up resistor (10kΩ) between DATA and VCC.
3. 3. Load the Arduino code.
4. 4. Check the datasheet for the recommended read frequency.
5. 5. Read the data with a loop in Arduino.
6. 6. Print the values on Serial Monitor.
7. 7. Verify the stability of the data.
8. 8. Adapt the code if necessary.

Example code

```cpp
#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  delay(2000);
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  Serial.print("Temperatura: ");
  Serial.print(t);
  Serial.print("°C, Umidità: ");
  Serial.print(h);
  Serial.println("%");
}
```

Mini project

Create an environmental humidity monitor in 30 minutes using an LCD display and a DHT11.

Common mistakes

• Negligence in pull-up connection.
• Incorrect power supply (not 5V).
• Unstable data due to incorrect baud rate.
• Error in Arduino code.

Recommended accessories

• LCD Display
• Arduino UNO
• 10kΩ Resistor
• Power Supply Cable

Frequently asked questions

Does DHT11 work with Arduino Uno?
Yes, DHT11 works with Arduino Uno.

How can I verify data stability?
Perform multiple measurements and compare values.

Which Arduino pins can I use?
Any digital pin on Arduino.