Introducing DHT20 Temperature and Humidity Sensor and Comparing it with DHT11!

(Update) Grove – Temperature & Humidity Sensor DHT20 V2.0 Released!

Following the release of the brand new DHT20 by Aosong Electronics, Seeed had upgraded our Grove – Temperature & Humidity Sensor DHT20! 

Similar to its predecessor DHT11, the Grove – Temperature & Humidity Sensors V2.0 based on DHT20 aims to provide high-quality features at a lost cost! The sensor is part of our Grove product series that aims to make assembling electronics easy using a building block approach. Continue reading to find out more about the brand new performance and reliability upgrade that sets itself apart from other sensors! 

DHT11 has been discontinued. Get your hands on a brand new DHT20 with extra high-quality features! 


Intro

With the advancement of advanced MEMS technology in sensor applications, Aosong Electronics has introduced us to a new temperature and humidity sensor module, the DHT20! 

The DHT20 is an upgraded version of the DHT11, equipped with a new temperature and humidity sensor chip. Following the newly released upgraded version, Seeed also upgraded our sensor that uses DHT11 to the new DHT20! Here’s what you need to know!


All-rounded Performance Upgrades across the board!

Aosong Electronics, the developer of DHT20 and DHT11, has over 20 years of research and development experience in the sensor manufacturing industry. Furthermore, Aosong Electronics sensors are used in many different industries such as agriculture and even the medical industry. With that, you can be assured that the DHT20 was developed by the most experienced people with utmost meticulousness! 

DHT20DHT11Remarks
Supply VoltageDC : 2.0 – 5.5VDC : 3.3 – 5.5VWider voltage range bringing more range of applications.
Measuring Range (Temperature)-40 ~ + 80 ℃-20 ~ + 60 ℃DHT20 features a wider range of measurement with more precision!
Measuring Range (Humidity)0 ~ 100% RH5 ~ 95% RH
Temperature Accuracy± 0.5 ℃± 1 ℃
Humidity Accuracy± 3 % RH ( 25 ℃ )± 5 % RH ( 25 ℃ )
Output SignalI2C signal1-WireDHT20 uses I2C signal output.

DHT20 features a brand-new ASIC dedicated chip, an improved MEMS semiconductor capacitive humidity module, and a standard on-chip temperature element. Besides its performance, the efficiency of DHT20 has also improved over the previous generation, making it more cost-effective. Following the miniaturization and changes, the DHT20 is proven to be more robust in harsher conditions!

DHT20 is also more versatile with its I2C signal which supports multiple masters!


Wide Range of Applications 

With the wider and more precise range of measurement, the DHT20 will be more than suitable for various IoT uses, especially for cases such as precision farming and quality control! Each DHT20 sensor is factory calibrated and tested to ensure that it maintains its stable performance in the long-term for the years to come.

With its rigidity, reliability, and performance, the DHT20 is very suitable for HVAC, automobiles, data loggers, weather stations, home appliances, and even medical uses and other related temperature and humidity detection and controlled areas. 


Seeed’s DHT20 Sensor Upgrade

Here at Seeed, our Grove product line consist of a temperature and humidity sensor that uses the DHT11 module. 

Grove – Temperature & Humidity Sensor (DHT11)

Grove’s DHT11 Temperature and Humidity Sensor is a high-quality, low-cost digital temperature and humidity sensor that uses the DHT11 module. This sensor is part of Seeed’s Grove System. Grove is a modular, open-source, and ready-to-use toolset. Electronics are assembled using a building block approach. Learn more about Grove at Seeed’s Wiki page!


I2C Output

As mentioned, the new DHT20 features I2C signal output, which brings its various advantages such as multiple masters, flow control and easier diagnosis and debugging! However, only a single DHT20 can be connected to the I2C bus, and other I2C devices cannot be connected.

Fret not. Here at Seeed, we have a Grove I2C Hub for you to connect more I2C devices to your device!

Grove – I2C Hub

I2C Hub Grove is a Grove extension module that allows you to attach several I2C devices to the Grove Base Shield. It connects up to 7 I2C devices using a Universal 4 Pin to X2 4 Pin cable, which should cover most development needs!

Grove – I2C Hub (6 Port)

The Grove I2C Hub also comes in a 6 port version, two more extra connectors, for the same size! This version was released after gathering feedback from our customers stating that 4 ports are not enough.

You can connect this I2C hub with another I2C hub for even more I2C devices to be plugged in!

Grove – 8 Channel I2C Multiplexer/I2C Hub (TCA9548A)

If 6 ports are still not enough, there is also an 8 channel version with a multiplexer chip supporting the use of 8 I2C devices with the same I2C address.

The multiplexer chip adopts a time-division multiplexing technology to enable the control of 8 I2C devices with the same address. Therefore, you don’t need to worry about any address conflicts occurring!

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