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simple-temperature-and-humidity-sensor-dd1b3a-en.md

I'm trying to learn Arduino and decided to make a simple thermometer with a seven-segment display and a button to change from temperature to humidity and vice versa.

About the 4 digits 7 segment display, the one I used has 12 pins (A to G pin, DP pin and the Digit pins). In the schematic:

the top row, in order from left to right: DG1, A, F, DG2, DG3, B

the bottom row, in order from left to right: E, D, DP, C, G, DG4

EXPANDED TECHNICAL DETAILS

Standard Environmental Monitoring

The foundational project for understanding climate data acquisition.

  • DHT11/DHT22 Interfacing: Uses the standard One-Wire protocol to fetch a 40-bit data packet. The DHT22 is recommended for this build due to its higher accuracy (+/- 0.5°C) and expanded range.
  • Data Parsing: The Arduino library handles the timing-critical pulses, separating the humidity integer and temperature decimal parts.

UI Presentation

  • I2C LCD Display: Results are shown in real-time on a blue-backlit 16x2 character display.
  • Unit Conversion: Included code allows the user to toggle between Celsius and Fahrenheit by pressing a simple momentary tactile switch connected to a digital input.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Simple Temperature and Humidity Sensor!"
description: "Find how hot or cold is your room with this simple temperature and humidity sensor with a DHT11!"
author: "sgongo"
category: ""
tags:
  - "monitoring"
views: 5367
likes: 2
price: 699
difficulty: "Easy"
components:
  - "1x Pushbutton"
  - "1x Breadboard (generic)"
  - "1x DHT11 Temperature & Humidity Sensor (4 pins)"
  - "1x 4 digit 7 segment display"
  - "1x Arduino Mega 2560"
  - "1x Resistor 220 ohm"
  - "1x Jumper wires (generic)"
tools: []
apps:
  - "1x Arduino IDE"
downloadableFiles:
  - "https://projects.arduinocontent.cc/c0f64a2c-fa74-423a-a0d6-8fb629eaaaa4.ino"
documentationLinks: []
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seoDescription: "Build a simple Temperature and Humidity Sensor using DHT11 and Arduino to monitor your room's climate easily."
videoLinks: []
heroImage: "https://cdn.jsdelivr.net/gh/bigboxthailand/arduino-assets@main/images/projects/simple-temperature-and-humidity-sensor-dd1b3a_cover.jpg"
lang: "en"