Fermion: SHTC3 Humidity & Temperature Sensor Wiki

Introduction

The SHTC3 digital humidity sensor from Sensirion builds on the success of the proven SHTC1 sensor and offers consistent high accuracy within measuring range.
The sensor covers a humidity measurement range of 0 to 100%RH and a temperature detection range of -40°C to 125°C with a typical accuracy of ±2％RH and ±0.2℃.
The board supply voltage of 3.3V to 5V and an current consumption below 0.15mA in low power mode make the SHTC3 perfectly suitable for mobile or wireless battery-driven applications.

Features

High Accuracy
Low Power Comsumption
Small Size
Fast Response

Applications

Intelligent Buidings and Furniture
Weather Station
Warehouses
Animals and Plants Culture
Animal Incubator
Germinating Box for plant seed

Specification

Operating Voltage: 3.3V~5V
Operating Current: 0.45mA
Communication Interface: I2C
Humidity Measurement Range: 0~100%RH
Humidity Measurement Accuracy: ±2%
Temperature Measurement Range: -40~+125℃ (-40 to +275℉)
Temperature Measurement Range: ±0.2℃
Response Time: 8s(tau63%)
Dimension: 14×17mm/0.55×0.67”
Mounting Hole Size: M2 (2mm)
Mounting Hole Pitch: 10mm

Board Overview

NO.	Silkscreen	Function
1	VCC	Positive Pole
2	GND	Negative Pole
3	SCL	I2C ClockLine
4	SDA	I2C Data Line

Tutorial

Requirements

Hardware
- DFRduino UNO R3 (or similar) x 1
- SHTC3 Digital Temperature and Humudity Sensor x 1#
- M-M/F-M/F-F Jumper wires
Software
- Arduino IDE
- Download and install the SHT Library. (About how to install the library?)
API Functions

    /**
   * @brief  初始化Wire,并且对传感器进行软件复位,然后使传感器进入睡眠状态,需要使用时,在对其进行唤醒。
   */
  void begin();

  /**
   * @brief  获取温度数据
   * @return 温度值,单位：摄氏度
   */
  float getTemperature();

  /**
   * @brief  获取湿度数据
   * @return 湿度值,单位：%RH
   */
  float getHumidity();

  /**
   * @brief  获取温湿度数据
   * @param   tem  存放温度数据的引用
   * @param   hum  存放湿度数据的引用
   */
  void  getTemHum(float &tem, float &hum);

  /**
   * @brief  设置传感器工作模式
   * @param  mode  传感器的工作模式
   * @n            SHTC3：
   * @n                    PRECISION_HIGH_CLKSTRETCH_ON                              Clock Stretching Enabled 
   * @n                    PRECISION_HIGH_CLKSTRETCH_OFF                             Clock Stretching Disabled 
   * @n                    PRECISION_LOW_CLKSTRETCH_ON                               Clock Stretching Enabled & Low Power
   * @n                    PRECISION_LOW_CLKSTRETCH_OFF                              Clock Stretching Disabled & Low Power
   * @n            SHT40:
   * @n                    PRECISION_HIGH_HEATER_OFF                                 measure T & RH with high precision (high repeatability) 
   * @n                    PRECISION_MID_HEATER_OFF                                  measure T & RH with medium precision (medium repeatability)
   * @n                    PRECISION_LOW_HEATER_OFF                                  measure T & RH with lowest precision (low repeatability) 
   * @n                    PRECISION_HIGH_HEATER_1S                                  activate highest heater power & high precis. meas. (typ. 200mW @ 3.3V) for 1s 
   * @n                    PRECISION_HIGH_HEATER_100MS                               activate highest heater power & high precis. meas. (typ. 200mW @ 3.3V) for 0.1s
   * @n                    PRECISION_MID_HEATER_1S                                   activate medium heater power  & high precis. meas. (typ. 110mW @ 3.3V) for 1s 
   * @n                    PRECISION_MID_HEATER_100MS                                activate medium heater power  & high precis. meas. (typ. 110mW @ 3.3V) for 0.1s 
   * @n                    PRECISION_LOW_HEATER_1S                                   activate lowest heater power  & high precis. meas. (typ. 20mW @ 3.3V) for 1s 
   * @n                    PRECISION_LOW_HEATER_100MS                                activate lowest heater power  & high precis. meas. (typ. 20mW @ 3.3V) for 0.1s 
   */
   void setMode(uint16_t mode) ;

  /**
   * @brief  获取传感器的唯一标识符
   * @return 获取成功返回传感器的唯一标识符,失败返回0
   */
   uint32_t getDeviceID();

  /**
   * @brief  software reset
   */
   void softwareReset() ;

  /**
   * @brief  Obtain raw data of temperature and humidity
   * @param  temp Pointer to the address of the original value of the temperature
   * @param  hun   Pointer to the address of the original value of the humidity
   * @return Is the data obtained correct? return true  The data is correct ; return false  The data  is incorrect
   */
   bool getTandRHRawData(uint16_t *temp, uint16_t *hum);
   
  /**
   * @brief  当传感器处于睡眠模式时,在进行任何进一步的通信之前,需要唤醒
   */
  void wakeup();
  
  /**
   * @brief  设置传感器为睡眠模式,设置后,在未唤醒前无法进行数据采集
   */
  void sleep();

Connection Diagram

Sample Code - Read Data

Record program and read the current temperature and humidity data.

    /**
   * @brief  初始化Wire,并且对传感器进行软件复位,然后使传感器进入睡眠状态,需要使用时,在对其进行唤醒。
   */
  void begin();

  /**
   * @brief  获取温度数据
   * @return 温度值,单位：摄氏度
   */
  float getTemperature();

  /**
   * @brief  获取湿度数据
   * @return 湿度值,单位：%RH
   */
  float getHumidity();

  /**
   * @brief  获取温湿度数据
   * @param   tem  存放温度数据的引用
   * @param   hum  存放湿度数据的引用
   */
  void  getTemHum(float &tem, float &hum);

  /**
   * @brief  设置传感器工作模式
   * @param  mode  传感器的工作模式
   * @n            SHTC3：
   * @n                    PRECISION_HIGH_CLKSTRETCH_ON                              Clock Stretching Enabled 
   * @n                    PRECISION_HIGH_CLKSTRETCH_OFF                             Clock Stretching Disabled 
   * @n                    PRECISION_LOW_CLKSTRETCH_ON                               Clock Stretching Enabled & Low Power
   * @n                    PRECISION_LOW_CLKSTRETCH_OFF                              Clock Stretching Disabled & Low Power
   * @n            SHT40:
   * @n                    PRECISION_HIGH_HEATER_OFF                                 measure T & RH with high precision (high repeatability) 
   * @n                    PRECISION_MID_HEATER_OFF                                  measure T & RH with medium precision (medium repeatability)
   * @n                    PRECISION_LOW_HEATER_OFF                                  measure T & RH with lowest precision (low repeatability) 
   * @n                    PRECISION_HIGH_HEATER_1S                                  activate highest heater power & high precis. meas. (typ. 200mW @ 3.3V) for 1s 
   * @n                    PRECISION_HIGH_HEATER_100MS                               activate highest heater power & high precis. meas. (typ. 200mW @ 3.3V) for 0.1s
   * @n                    PRECISION_MID_HEATER_1S                                   activate medium heater power  & high precis. meas. (typ. 110mW @ 3.3V) for 1s 
   * @n                    PRECISION_MID_HEATER_100MS                                activate medium heater power  & high precis. meas. (typ. 110mW @ 3.3V) for 0.1s 
   * @n                    PRECISION_LOW_HEATER_1S                                   activate lowest heater power  & high precis. meas. (typ. 20mW @ 3.3V) for 1s 
   * @n                    PRECISION_LOW_HEATER_100MS                                activate lowest heater power  & high precis. meas. (typ. 20mW @ 3.3V) for 0.1s 
   */
   void setMode(uint16_t mode) ;

  /**
   * @brief  获取传感器的唯一标识符
   * @return 获取成功返回传感器的唯一标识符,失败返回0
   */
   uint32_t getDeviceID();

  /**
   * @brief  software reset
   */
   void softwareReset() ;

  /**
   * @brief  Obtain raw data of temperature and humidity
   * @param  temp Pointer to the address of the original value of the temperature
   * @param  hun   Pointer to the address of the original value of the humidity
   * @return Is the data obtained correct? return true  The data is correct ; return false  The data  is incorrect
   */
   bool getTandRHRawData(uint16_t *temp, uint16_t *hum);

  /**
   * @brief  当传感器处于睡眠模式时,在进行任何进一步的通信之前,需要唤醒
   */
  void wakeup();

  /**
   * @brief  设置传感器为睡眠模式,设置后,在未唤醒前无法进行数据采集
   */
  void sleep();

Expected Results

Open the serial port to display the current temperature and humidity data.

FAQ

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