82 lines
3 KiB
Markdown
82 lines
3 KiB
Markdown
# DFRobot_DHT20
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The DHT20 temperature & humidity sensor is the newly upgraded version of the DHT11. The DHT20 features a brand-new ASIC dedicated chip, an improved MEMS semiconductor capacitive humidity sensor element and a standard on-chip temperature element. All sensors are factory calibrated and characterized by low power, high precision & stability, fast response, and strong anti-interference. Moreover, the DHT20 performance parameters of accuracy, power supply voltage, measurement range and response time have been enhanced greatly over the previous generation,making it more cost-effective. Besides that, the DHT20 temperature & humidity sensor employs I2C digital output protocol, which is very suitable for HVAC,automobiles, data loggers, weather stations, home appliances, and other related temperature and humidity detection and controlled areas. <br>
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<img src="https://dfimg.dfrobot.com/nobody/wiki/73694035631036647cd8872b1d083f6c.png" width="450" hegiht="" align=right/>
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## [Product Link](https://www.dfrobot.com/product-2391.html)
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SKU：SEN0497
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## Table of Contents
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* [Summary](#summary)
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* [Installation](#installation)
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* [Methods](#methods)
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* [Compatibility](#compatibility)
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* [History](#history)
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* [Credits](#credits)
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## Summary
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Provide an Arduino library to get Humidity and Temperature by reading data from dht20.
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## Installation
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To use this library, first download the library file, paste it into the \Arduino\libraries directory, then open the examples folder and run the demo in the folder.
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## Methods
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```C++
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/*!
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* @brief Construct the function
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* @param pWire IC bus pointer object and construction device, can both pass or not pass parameters, Wire in default.
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* @param address Chip IIC address, 0x38 in default.
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*/
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DFRobot_DHT20(TwoWire *pWire = &Wire, uint8_t address = 0x38);
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/**
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* @brief init function
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* @return Return 0 if initialization succeeds, otherwise return non-zero and error code.
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*/
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int begin(void);
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/**
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* @brief Get ambient temperature, unit: °C
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* @return ambient temperature, the measurement range is (-40°C ~ 80°C)
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*/
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float getTemperature();
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/**
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* @brief Get relative humidity, unit: %RH.
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* @return Relative humidity, the measurement range is (1-100%)
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*/
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float getHumidity();
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```
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## Compatibility
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MCU | Work Well | Work Wrong | Untested | Remarks
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------------------ | :----------: | :----------: | :---------: | -----
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Arduino Uno | √ | | |
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Mega2560 | √ | | |
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Leonardo | √ | | |
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ESP32 | √ | | |
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ESP8266 | √ | | |
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M0 | √ | | |
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Micro:bit | √ | | |
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## History
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- Date 2021-6-25
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- Version V1.0.0
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## Credits
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Written by fengli(li.feng@dfrobot.com), 2021.7.31 (Welcome to our [website](https://www.dfrobot.com/))
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