DHT11 4-Pin Digital Temperature and Humidity Sensor Module

A cost-effective entry point for temperature and humidity sensing

The DHT11 module is a reliable and cost-effective environmental sensing module designed to measure temperature and relative humidity accurately, and it remains one of the most commonly used starter sensors for exactly that purpose in beginner Arduino and Raspberry Pi projects. It's factory-calibrated, meaning the readings it produces are already accurate without needing any manual calibration step in code, and its single-wire digital interface keeps the wiring and reading logic straightforward.

Its temperature range covers 0C to 50C, with humidity measured from 20% to 90% relative humidity, both with 16-bit resolution and an accuracy of ±1C and ±1% respectively, figures that make it well suited to typical indoor environmental monitoring rather than more extreme outdoor or industrial temperature ranges.

Power and connectivity

Operating current is just 0.3mA while actively measuring, dropping to a very low 60uA in standby, which matters for any battery-powered or always-on IoT project where power budget is a real constraint. Operating voltage spans 3.5V to 5.5V, and the module's single-wire digital interface is described as offering easy and fast integration compared to more complex sensor protocols.

It's compatible with Arduino, ESP32, ESP8266 and Raspberry Pi, covering essentially all the common hobbyist microcontroller platforms, and its compact 4-pin design keeps the physical footprint small for whatever enclosure or PCB it's mounted on.

Who it suits

Beginners building their first temperature and humidity monitoring project, or anyone on a tight budget who needs basic indoor environmental readings without the wider range or higher precision of a DHT22, will find the DHT11 a well-documented, low-cost starting point.

Questions buyers ask

What temperature and humidity range does it cover?

0C to 50C temperature, and 20% to 90% relative humidity.

Is the output pre-calibrated?

Yes, it's factory-calibrated.

How much power does it draw?

0.3mA while measuring, and just 60uA in standby.