🌡️ DHT‑11 Temperature and Humidity Sensor

📌 Description

The DHT‑11 is a digital sensor that measures temperature and humidity. It’s simple, inexpensive, and widely used in beginner projects. The sensor sends data in digital form, making it easy for microcontrollers to read.

🎯 Use

In our projects, the DHT‑11 is used to:

• Monitor room temperature and humidity.
• Trigger fans or heaters when conditions change.
• Collect environmental data for smart robots or IoT systems.

👉 Think of the DHT‑11 as the robot’s weather station — it tells the robot how hot and humid the environment is.

Module parameters

Pin name	Description
G	GND (Power Input Negative)
V	VCC (Power Input Cathode)
S	Digital signal pins

• Supply voltage: 3.3V/5V
• Connection: PH2.0 terminal wire
• Installation method: double screw fixing

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🖥️ Code Explanation

import machine
import dhtx
import time

while True:
    print(dhtx.DHT11(17).temperature(), end="")   # Read temperature
    print('℃    ', end="")                        # Print unit
    print(dhtx.DHT11(17).humidity(), end="")      # Read humidity
    print('%  ')                                  # Print unit
    time.sleep_ms(200)                            # Wait 0.2 seconds

Step by Step

1. import machine, dhtx, time → Tools for pins, DHT‑11 driver, and timing.
2. dhtx.DHT11(17) → Initializes the DHT‑11 sensor on pin 17.
3. .temperature() → Reads the temperature in Celsius.
4. .humidity() → Reads the humidity percentage.
5. print(...) → Displays the values with units (℃ and %).
6. time.sleep_ms(200) → Adds a short delay before the next reading.

👉 Together, this program prints the temperature and humidity every 0.2 seconds.

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✅ Conclusion of the Test

• If the program prints temperature (℃) and humidity (%) values that change with the environment, the sensor is working correctly.
• This test shows how the robot can measure environmental conditions and report them digitally.
• Later, the DHT‑11 could be used to control fans, activate humidifiers, or log data for smart monitoring systems.