Description
The DHT-11 Temperature & Humidity Sensor Module is one of the most widely used and beginner-friendly sensors available — perfect for your first Arduino or ESP32 project that needs environmental data. It measures temperature from 0°C to 50°C and relative humidity from 20% to 90% and sends the reading digitally over a single data wire, making it incredibly easy to connect and use.
Already built as a module with onboard pull-up resistor, this DHT-11 board needs just 3 wires — VCC, GND, and DATA — and works directly with Arduino, ESP32, ESP8266, and Raspberry Pi. The most affordable temperature and humidity sensor available in Bangladesh.
⭐ Key Features
Temperature Measurement
Range: 0°C to 50°C — Accuracy: ±2°C
Humidity Measurement
Range: 20% to 90% RH — Accuracy: ±5% RH
Single Wire Digital Output
Only 3 wires needed — VCC, GND and DATA
Module with Pull-up Resistor
Onboard resistor — plug in directly, no extra components
Beginner Friendly
Simple DHT library — working code in minutes
3.3V and 5V Compatible
Works with Arduino (5V) and ESP32/ESP8266 (3.3V)
🚀 What Can You Build With the DHT-11?
🌤️
Weather Stations
Indoor temperature and humidity monitoring
🏠
Smart Home Climate
Monitor room conditions and trigger fan or AC
🌐
IoT Data Logging
Send readings to cloud dashboards and Blynk
📊
OLED Display Projects
Show live temperature and humidity on screen
📚
Student Projects
University IoT and embedded systems assignments
👤 Who Should Buy This?
🎓 Beginners
First sensor project — DHT-11 is the easiest temperature sensor to use with Arduino and ESP32
📚 Students
Lab assignments, IoT projects, weather station builds and university embedded systems coursework
⚙️ Engineers
Rapid prototyping for climate monitoring where ±2°C accuracy is acceptable
🛠️ Hobbyists
DIY smart home builds, greenhouse monitors and room temperature loggers
⚔️ DHT-11 vs DHT-22 vs DS18B20 vs LM35 — Which Sensor Should You Use?
A complete comparison to help you choose the right temperature sensor for your project
| Feature | THIS ITEM DHT-11 | UPGRADE DHT-22 | WATERPROOF DS18B20 | ANALOG LM35 |
|---|---|---|---|---|
| Temp Range | 0°C to 50°C | -40°C to 80°C | -55°C to 125°C | -55°C to 150°C |
| Temp Accuracy | ±2°C | ±0.5°C (Better) | ±0.5°C | ±0.5°C |
| Humidity | ✅ 20–90% RH | ✅ 0–100% RH | ❌ No | ❌ No |
| Output Type | Digital | Digital | Digital (1-Wire) | Analog |
| Waterproof | ❌ No | ❌ No | ✅ Available | ❌ No |
| Best For | Indoor, budget projects | Precise climate sensing | Liquid & outdoor temp | Simple analog reading |
🔧 Features & Specifications
🔧 Library Setup & Quick Start Example
Install DHT Library
Arduino IDE → Sketch → Include Library → Manage Libraries → Search DHT sensor library by Adafruit → Install. Also install Adafruit Unified Sensor when prompted.
Wire the Module
Connect VCC → 3.3V or 5V, GND → GND, DATA → any digital GPIO pin (e.g. D2 on Arduino, GPIO4 on ESP32).
DHT-11 Read Temperature & Humidity Example
#include "DHT.h" #define DHTPIN 4 // GPIO4 on ESP32 / D2 on Arduino #define DHTTYPE DHT11 // DHT-11 type DHT dht(DHTPIN, DHTTYPE); void setup() { Serial.begin(115200); dht.begin(); } void loop() { delay(2000); // DHT-11 needs 2 second delay between reads float humidity = dht.readHumidity(); float temperature = dht.readTemperature(); if (isnan(humidity) || isnan(temperature)) { Serial.println("Failed to read! Check wiring."); return; } Serial.print("Temperature: "); Serial.print(temperature); Serial.println(" °C"); Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %"); }
❓ Frequently Asked Questions
🔗 Other Temperature Sensors From Dream RC
DHT-22 Digital Temperature & Humidity Sensor
Need more accuracy? The DHT-22 offers ±0.5°C accuracy, wider range (-40°C to 80°C), and full 0–100% humidity sensing — a major step up for precise climate projects.
DS18B20 Digital Temperature Sensor (TO-92)
Need to measure liquid or outdoor temperature? The DS18B20 measures from -55°C to 125°C with ±0.5°C accuracy and a waterproof probe option — perfect for water, soil and outdoor use.
LM35 Temperature Sensor
Prefer an analog sensor? The LM35 outputs a voltage directly proportional to temperature — simple, reliable, and works with any microcontroller’s analog input without any library.
📦 Package Includes
1 × DHT-11 Temperature & Humidity Sensor Module
3-pin module with onboard pull-up resistor — jumper wires not included
💬 DHT-11 Sensor Module Price in BD & Why Buy From Dream RC?
The DHT-11 Temperature & Humidity Sensor Module price in BD is 119 BDT. Buy the DHT-11 sensor in Bangladesh from Dream RC — your trusted source for sensors and electronics at the best price with fast delivery and Cash on Delivery nationwide.
Pay after receiving
Quick processing
69 BDT — 24 hrs
129 BDT — 24–72 hrs