DHT11 Digital Temperature & Relative Humidity Sensor Module
The DHT11 is the world’s most popular entry-level climate sensor, available at RoboShop BD. This composite module contains a calibrated digital signal output of both temperature and humidity. By using a dedicated digital-signal-acquisition technique and temperature & humidity sensing technology, it ensures high reliability and excellent long-term stability. It is the perfect choice for students and hobbyists building local weather stations, automatic humidor controls, or home automation systems.
110.00৳ 130.00৳
Reliable Dual-Sensing Technology
The DHT11 utilizes a resistive-type humidity measurement component and an NTC (Negative Temperature Coefficient) thermistor for temperature. These are connected to a high-performance 8-bit microcontroller inside the sensor. At RoboShop BD, we provide the Module Version, which includes the necessary pull-up resistor and filtering capacitor on a breadboard-friendly PCB, allowing you to connect it directly to your Arduino or ESP32 without extra components.
Simple Single-Bus Interface
Communication with the DHT11 is handled via a unique “Single-Bus” serial protocol. This means it only requires one digital pin to transmit 40 bits of data (Humidity + Temperature + Checksum). While it is an ultra-low-cost sensor, it provides pre-calibrated data, saving you the hassle of complex mathematical conversions in your code. Please note that the sensor has a sampling rate of 1Hz (one reading per second), making it ideal for stable environmental monitoring.
Key Features
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Dual Output: Provides both Relative Humidity (%RH) and Temperature (°C) data.
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Module Convenience: Includes a power indicator LED and a pre-soldered 3-pin header.
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Digital Calibration: Calibration coefficients are stored in internal OTP memory.
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Wide Voltage Range: Compatible with both 3.3V and 5V logic levels.
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Low Power Consumption: Minimal current draw during measurement (max 2.5mA).
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Long-Distance Signal: Capable of transmitting data over cables up to 20 meters.
Technical Specifications
| Specification | Details |
| Operating Voltage | 3.3V – 5.5V DC |
| Humidity Range | 20% – 90% RH |
| Humidity Accuracy | ± 5.0% RH |
| Temperature Range | 0°C – 50°C |
| Temperature Accuracy | ± 2.0°C |
| Sampling Period | 1 Second (Min) |
| Output Type | Digital (Single-Bus) |
| Dimensions | 15.5mm x 12mm x 5.5mm |
Pinout (Module Version)
| Pin | Label | Function |
| 1 | S / Out | Digital Data Output |
| 2 | VCC | Power Supply (3.3V – 5V) |
| 3 | GND | Ground |
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