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dht11-temperature-and-humidity-sensor-using-arduino-in-2020-85d854-en.md

Environmental Intelligence: Networking with DHT11 and Ethernet

In the era of smart homes, knowing the temperature and humidity of your room is just the beginning. The real value lies in being able to access that data from anywhere on your local network. This project moves beyond a simple sensor readout by integrating the Arduino Uno with an Ethernet W5100 Shield, creating a wired IoT node capable of environmental data logging.

Advanced Sensing: Beneath the DHT11 Shell

The DHT11 is a composite sensor that provides calibrated digital signal output.

  • Dual-Sensing Physics: It combines a resistive-type humidity measurement component (a moisture-holding substrate between two electrodes) and an NTC (Negative Temperature Coefficient) thermistor for temperature.
  • On-board Signal Processing: Unlike analog sensors, the DHT11 contains an 8-bit microcontroller that handles the analog-to-digital conversion and outputs a 40-bit data packet (8-bit integral RH, 8-bit decimal RH, 8-bit integral T, 8-bit decimal T, and an 8-bit checksum). This ensures high reliability and excellent long-term stability.

Wired Reliability: The W5100 Ethernet Shield

While WiFi is common, wired Ethernet remains the gold standard for stability in industrial and permanent home automation installs.

  • Dedicated Hardware TCP/IP Stack: The W5100 chip handles the complex networking protocols (TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE) internally, freeing up the Arduino's processor to focus on sensor logic.
  • Web Server Implementation: By using the Ethernet.h library, the Arduino can serve a simple HTML page to any device on the network. When you type the Arduino's IP address into your browser, it responds with a real-time table of the current temperature and humidity.

Portable Power and Deployment

To make the system truly versatile, the project includes a 9V Battery Clip, enabling mobile deployment in areas without easy access to power outlets, such as greenhouses or attics. Mounted on a standard breadboard, this setup serves as a fundamental building block for advanced HVAC controllers, server room monitors, or automated plant care systems.

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May 13, 2020

This video contains a brief introduction, working, required components and connections of the project on TEMPERATURE AND HUMIDITY SENSOR using...

https://www.youtube.com/watch?v=3BOXO-61ZjA

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ข้อมูล Frontmatter ดั้งเดิม 

title: "Dht11 temperature and humidity sensor using arduino in 2020"
description: "This Project is Quite Simple anyone can made it at home."
author: "SAROSH_AHMAD"
category: ""
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views: 1973
likes: 0
price: 870
difficulty: "Intermediate"
components:
  - "1x Jumper wires (generic)"
  - "1x Arduino UNO"
  - "1x  Arduino Ethernet W5100 Shield for UNO"
  - "1x 9V Battery Clip"
  - "1x 9V battery (generic)"
  - "1x Jumper wires (generic)"
  - "1x Breadboard (generic)"
  - "1x DHT11 Temperature & Humidity Sensor (4 pins)"
tools: []
apps:
  - "1x Arduino IDE"
downloadableFiles:
  - "https://projects.arduinocontent.cc/1022f6aa-8686-4b4c-b4b4-12e0921b14af.docx"
documentationLinks: []
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seoDescription: "Learn how to use Dht11 temperature and humidity Sensor with Arduino. A simple DIY project for beginners to build at home."
videoLinks:
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lang: "en"