# DHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor

**Type:** Product page · **SKU:** ADA5183 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/dht20-aht20-pin-module-i2c-temperature-and-humidity-sensor.html ([markdown](https://core-electronics.com.au/dht20-aht20-pin-module-i2c-temperature-and-humidity-sensor.html.md))

The DHT20 is a nice but inexpensive temperature and humidity sensor from the same folks that brought us the DHT22.This little sensor looks an awful...

## Pricing

- **Price:** $7.90 (inc GST) — $7.18 AUD, exc GST
- **Quantity discounts:** 10+ $6.96 (exc GST) · 50+ $6.82 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 28 and Sep 01.

## Description

The DHT20 is a nice but inexpensive temperature and humidity sensor [from the same folks that brought Adafruit the DHT22](https://core-electronics.com.au/dht22-temperature-humidity-sensor-extras.html).

This little sensor looks an *awful lot* like the popular DHT11/DHT22 temperature and humidity sensors, but unlike classic DHT sensors, it has an I²C interface! That's right, you do not need to use a bit-bang timing-specific protocol to talk to the DHT20, it uses plain-old-I²C. And, you can power it with anything from 2.5V to 5.5V so it's good with 3V or 5V microcontrollers. Whew, that makes things a little easier, doesn't it?

[Inside is the AHT20](https://core-electronics.com.au/adafruit-aht20-temperature-humidity-sensor-breakout-board-stemma-qt-qwiic.html). You can take sensor readings as often as you like, and it uses standard I2C so its super easy to use with any Arduino or Linux/Raspberry Pi board.

This sensor has a typical accuracy of ±2% relative humidity, and ±0.3 °C at 20-80% RH and 20-60 °C. There is only one I2C address so it's not a good option when you need multiple humidity sensors.

That said, for maker and IoT projects? You can't beat the simplicity and price! And Adafruit have got ready-to-go working Arduino and CircuitPython code to use it. **[Check out Adafruit's detailed guide for library code, datasheet, and more](https://learn.adafruit.com/adafruit-aht20)**

Each order comes with one DHT20 pin module sensor with built-in pullups. You just provide any microcontroller that can run Adafruit's Arduino or CircuitPython library.

## Technical Details 

- I2C address 0x38 (cannot be changed)
- 2.5V to 5.5V power and logic level
- Pin order from Left to Right: Power, SDA, Ground, SCL
- Built in 4.7K I2C pullup resistors.
- Usage Humidity: 0... 100%RH
- Usage Temperature: -40ºC – 80ºC
- Typical accuracy of ±2% relative humidity, and ±0.3 °C at 20-80% RH and 20-60 °C
- Overall accuracy of ±3% relative humidity, and ±0.5 °C

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/5193_DHT20_1160062c972.pdf)

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## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_877.jpg)