DHT-11 Temperature & Humidity Sensor Module

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 MeasurementRange: 0°C to 50°C — Accuracy: ±2°C��Humidity MeasurementRange: 20% to 90% RH — Accuracy: ±5% RH��Single Wire Digital OutputOnly 3 wires needed — VCC, GND and DATA��Module with Pull-up ResistorOnboard resistor — plug in directly, no extra components��Beginner FriendlySimple DHT library — working code in minutes��3.3V and 5V CompatibleWorks with Arduino (5V) and ESP32/ESP8266 (3.3V)�� What Can You Build With the DHT-11?��️Weather StationsIndoor temperature and humidity monitoring��Smart Home ClimateMonitor room conditions and trigger fan or AC��IoT Data LoggingSend readings to cloud dashboards and Blynk��OLED Display ProjectsShow live temperature and humidity on screen��Student ProjectsUniversity IoT and embedded systems assignments�� Who Should Buy This?�� BeginnersFirst sensor project — DHT-11 is the easiest temperature sensor to use with Arduino and ESP32�� StudentsLab assignments, IoT projects, weather station builds and university embedded systems coursework⚙️ EngineersRapid prototyping for climate monitoring where ±2°C accuracy is acceptable��️ HobbyistsDIY 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 projectFeatureTHIS ITEMDHT-11UPGRADEDHT-22WATERPROOFDS18B20ANALOGLM35Temp Range0°C to 50°C-40°C to 80°C-55°C to 125°C-55°C to 150°CTemp Accuracy±2°C±0.5°C (Better)±0.5°C±0.5°CHumidity✅ 20–90% RH✅ 0–100% RH❌ No❌ NoOutput TypeDigitalDigitalDigital (1-Wire)AnalogWaterproof❌ No❌ No✅ Available❌ NoBest ForIndoor, budget projectsPrecise climate sensingLiquid & outdoor tempSimple analog reading�� Features & SpecificationsFeature ⚙️Details��️ Product TypeDHT-11 Temperature & Humidity Sensor Module��️ Temperature Range0°C to 50°C�� Temperature Accuracy±2°C�� Humidity Range20% to 90% RH�� Humidity Accuracy±5% RH�� InterfaceSingle wire digital (1-Wire)⚡ Operating Voltage3.3V – 5V⏱️ Sampling Rate1 reading per second (max)�� Module Type3-pin module with pull-up resistor onboard�� Compatible WithArduino, ESP32, ESP8266, Raspberry Pi�� Library Setup & Quick Start Example1Install DHT LibraryArduino IDE → Sketch → Include Library → Manage Libraries → Search DHT sensor library by Adafruit → Install. Also install Adafruit Unified Sensor when prompted.2Wire the ModuleConnect 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❓ DHT-11 or DHT-22 — which one should I buy?Choose DHT-11 for indoor, budget projects where ±2°C accuracy is fine — perfect for beginners and learning. Choose DHT-22 for more precise measurements (±0.5°C), wider temperature range (-40°C to 80°C), and better humidity sensing. The code is nearly identical — just change DHT11 to DHT22.❓ My DHT-11 keeps returning “nan” — how do I fix it?This usually means the sensor is not reading correctly. Check: (1) Wiring — make sure DATA pin is correctly connected. (2) Delay — add at least delay(2000) between reads. (3) Module version — the 3-pin module has an onboard resistor, the bare 4-pin sensor needs an external 10kΩ pull-up resistor on the data line.❓ What is the DHT-11 price in Bangladesh?The DHT-11 Temperature & Humidity Sensor Module price in BD is 119 BDT from Dream RC — the best price in Bangladesh with fast delivery and Cash on Delivery nationwide.�� Other Temperature Sensors From Dream RC DHT-22 Digital Temperature & Humidity SensorNeed 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. View DHT-22 → 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. View DS18B20 → LM35 Temperature SensorPrefer 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. View LM35 →�� Package Includes ��1 × DHT-11 Temperature & Humidity Sensor Module3-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.✅ COD AvailablePay after receiving⚡ Fast DispatchQuick processing�� Inside Dhaka69 BDT — 24 hrs�� Outside Dhaka129 BDT — 24–72 hrs