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how-to-use-dht11-366877-en.md

If you use 3 pin DHT11; make sure your DHT11 module face is looking at you like this

A photo of a DHT11 sensor

EXPANDED TECHNICAL DETAILS

Environmental Sensing Basics

The DHT11 is a composite sensor that includes a resistive humidity component and an NTC temperature measurement component.

  • One-Wire Protocol: The DHT11 uses a custom single-wire serial protocol. Each transmission consists of 40 bits (5 bytes) of data including an 8-bit checksum for error detection.
  • Sampling Rate: The sensor has a sampling rate of 1Hz (once per second). Rapid polling is avoided to ensure sensor stability.

Data Interpretation

  • Library Abstraction: Uses the DHT.h or SimpleDHT libraries to handle the complex timing required for the start-signal and data-bit interpretation.
  • Display Output: The Arduino formats the 8-bit integer data into a readable string (e.g., "Temp: 25°C, Hum: 60%") sent to the Serial Monitor or a character LCD.

ข้อมูล Frontmatter ดั้งเดิม 

title: "How to use DHT11"
description: "DHT11 Tutorial, That is all I got to say."
author: "the_com3_port"
category: ""
tags:
  - "weather"
  - "arduino"
  - "arduino"
views: 2345
likes: 0
price: 99
difficulty: "Easy"
components:
  - "1x Jumper wires (generic)"
  - "1x Resistor 10k ohm"
  - "1x Arduino UNO"
  - "1x Breadboard (generic)"
  - "1x DHT11 Temperature & Humidity Sensor (4 pins)"
tools: []
apps:
  - "1x Arduino IDE"
downloadableFiles:
  - "https://projects.arduinocontent.cc/faf8d480-931d-46e0-94b0-09c62c1db977.ino"
  - "https://projects.arduinocontent.cc/faf8d480-931d-46e0-94b0-09c62c1db977.ino"
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seoDescription: "Learn how to use the DHT11 Sensor with Arduino to measure temperature and humidity. Complete tutorial with wiring and code."
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