₹75.00
Overview
The DHT11 is a basic, ultra-low-cost digital temperature and humidity sensor. It utilizes a capacitive humidity sensor and a thermistor to measure the surrounding air, outputting a digital signal on the data pin (no analog input pins needed). It is widely used in beginner electronics, IoT projects, and environmental monitoring systems due to its simplicity, reliability, and low power consumption.
Pinout Configuration (Module vs Sensor)
As shown in the reference image, the DHT11 comes in two primary configurations: a 3-pin Breakout Board Module and a 4-pin Standalone Sensor IC.
| Pin No. | 3-Pin Module Board | 4-Pin Standalone Sensor | Description |
| 1 | VCC (+) | VCC | Power Supply (3.3V – 5.5V DC) |
| 2 | Data (S) | Data | Digital Signal Output / Input |
| 3 | GND (-) | NC | Module: Ground | Standalone: Not Connected |
| 4 | — | GND | Ground Connection (Standalone Sensor) |
Key Specifications
| Parameter / Feature | Specification Details |
| Operating Voltage | 3.3V to 5.5V DC |
| Measuring Range (Humidity) | 20% to 90% RH (Relative Humidity) |
| Measuring Range (Temperature) | 0°C to 50°C (32°F to 122°F) |
| Accuracy (Humidity) | ±5% RH |
| Accuracy (Temperature) | ±2°C |
| Resolution | 1% RH (Humidity), 1°C (Temperature) |
| Sampling Rate / Output Interval | 1 Hz (One reading every 1 second) |
| Communication Protocol | Single-wire custom digital signal / 1-Wire protocol |
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