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DHT11 Temperature and Humidity Sensor – Bare 4-Pin, 3.3V/5V

DHT11 Temperature and Humidity Sensor – Bare 4-Pin, 3.3V/5V to Pinterest (opens in a new window)
DHT11 Temperature and Humidity Sensor - Bare 4-Pin, 3.3V/5V

Brand NZN Electronics CLICK IT SKU CLICK-IT-794640 Category Components

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  • Brand NZN Electronics

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Overview

A bare DHT11 temperature and humidity sensor with 4 pins at 2.54 mm, so it fits a breadboard, stripboard or your own PCB. It sends both readings over one data wire to an Arduino, ESP32 or Raspberry Pi, on 3.3V or 5V. As a bare part it needs a pull-up resistor on the DATA pin, and pin 3 is not connected.

Specifications

SensorDHT11, single-wire digital output
Pinout1 VCC, 2 DATA, 3 NC, 4 GND (grille towards you, leads down)
Supply3.3 to 5.5V, works on 3.3V and 5V boards
Humidity20 to 80% RH, ±5% RH, 1% steps
Temperature0 to 50°C, ±2°C, 1°C steps
Read intervalEvery 2 seconds or slower
Data lineNeeds a 4.7k to 10k pull-up to VCC (not included)
SizeAbout 12 x 15.5 x 5.5 mm, leads about 8 mm
Lead pitch2.54 mm, breadboard friendly

Datasheets

Full technical datasheet
PDF

What’s in the box

1×
DHT11 temperature and humidity sensor, bare 4-pin

Loose sensor in an anti-static bag. The pull-up resistor and wires are not included.

Great for

Logging room temperature and humidity with an ESP32 and Home Assistant
A first temperature and humidity sketch on an Arduino Uno
Turning on a fan or dehumidifier relay when a room gets damp
Keeping an eye on a cupboard, garage or sheltered shed
Classroom and STEM sensor projects on a breadboard
Building your own sensor board on stripboard or a PCB

Wiring & getting started

  1. Find the pins

    Hold the sensor with the grille towards you and the leads pointing down. From left to right the pins are 1 VCC, 2 DATA, 3 NC and 4 GND. Pin 3 is not connected inside, so leave it free.

  2. Power it from your board’s logic voltage

    Connect VCC to 5V on an Arduino Uno or Nano, or to 3.3V on an ESP32 or Raspberry Pi, and GND to GND. On 3.3V keep the wires to the sensor under about 1 m.

  3. Add the pull-up

    Fit a 4.7k to 10k resistor between DATA and VCC, then connect DATA to a digital pin, such as D2 on an Arduino or GPIO4 on an ESP32. Our 600pc resistor kit has both values. If you would rather skip the resistor, our DHT22 module has the pull-up fitted.

  4. Read it

    In the Arduino IDE install the DHT sensor library, set the type to DHT11 and open the DHTtester example. In ESPHome use the dht platform with model DHT11. Read every 2 seconds or slower, and ignore the first reading after power-up.

Note: The housing is vented, not sealed. Keep it out of rain, direct sun and condensation, and away from regulators or other warm parts, which push the temperature up and the humidity down.

Specification

Specification for DHT11 Temperature and Humidity Sensor - Bare 4-Pin, 3.3V/5V
CLICK IT SKU CLICK-IT-794640
Brand NZN Electronics

Features

A bare DHT11 temperature and humidity sensor with 4 pins at 2.54 mm, so it fits a breadboard, stripboard or your own PCB. It sends both readings over one data wire to an Arduino, ESP32 or Raspberry Pi, on 3.3V or 5V. As a bare…

  • Brand NZN Electronics

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