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libraries/DFRobot_DHT20/README.md

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+# DFRobot_DHT20
+
+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>
+
+<img src="https://dfimg.dfrobot.com/nobody/wiki/73694035631036647cd8872b1d083f6c.png" width="450" hegiht="" align=right/>
+
+
+## [Product Link](https://www.dfrobot.com/product-2391.html)
+    SKU：SEN0497
+## Table of Contents
+
+* [Summary](#summary)
+* [Installation](#installation)
+* [Methods](#methods)
+* [Compatibility](#compatibility)
+* [History](#history)
+* [Credits](#credits)
+
+## Summary
+
+
+Provide an Arduino library to get Humidity and Temperature by reading data from dht20.
+
+## Installation
+
+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.
+
+## Methods
+```C++
+
+  /*!
+   * @brief Construct the function
+   * @param pWire IC bus pointer object and construction device, can both pass or not pass parameters, Wire in default.
+   * @param address Chip IIC address, 0x38 in default.
+   */
+  DFRobot_DHT20(TwoWire *pWire = &Wire, uint8_t address = 0x38);
+
+  /**
+   * @brief init function
+   * @return Return 0 if initialization succeeds, otherwise return non-zero and error code.
+   */
+  int begin(void);
+    
+  /**
+   * @brief Get ambient temperature, unit: °C
+   * @return ambient temperature, the measurement range is (-40°C ~ 80°C)
+   */
+  float getTemperature();
+    
+  /**
+   * @brief Get relative humidity, unit: %RH. 
+   * @return Relative humidity, the measurement range is (1-100%)
+   */
+  float getHumidity();
+```
+
+## Compatibility
+
+MCU                | Work Well    | Work Wrong   | Untested    | Remarks
+------------------ | :----------: | :----------: | :---------: | -----
+Arduino Uno        |      √       |              |             | 
+Mega2560        |      √       |              |             | 
+Leonardo        |      √       |              |             | 
+ESP32        |      √       |              |             | 
+ESP8266        |      √       |              |             | 
+M0        |      √       |              |             | 
+Micro:bit        |      √       |              |             | 
+
+## History
+
+- Date 2021-6-25
+- Version V1.0.0
+
+
+## Credits
+
+Written by fengli(li.feng@dfrobot.com), 2021.7.31 (Welcome to our [website](https://www.dfrobot.com/))
+
+
+
+
+