零知开源分享-使用SPG30模块进行空气质量监测

零知实验室-roc

空气质量监测-SGP30模块VOC CO2
http://www.lingzhilab.com/forum. ... d&tid=485&fromuid=2
(出处: 零知实验室)

使用SGP30模块对空气中的VOC和CO2进行监测，获取空气质量状况。
1、硬件：

• 零知-标准板
• SGP30多像素气体传感器模块
  
  

注意：模块的供电标准为1.8V，所以使用时需要接电平转换才可以接到开发板中。
2、测试demo：
[mw_shl_code=cpp,true]/*
*        空气质量：VOC,CO2测量
*         零知开源-www.lingzhilab.com
*/

#include "Adafruit_SGP30.h"

Adafruit_SGP30 sgp;

/* return absolute humidity [mg/m^3] with approximation formula
* @param temperature [°C]
* @param humidity [%RH]
*/
uint32_t getAbsoluteHumidity(float temperature, float humidity) {
    // approximation formula from Sensirion SGP30 Driver Integration chapter 3.15
    const float absoluteHumidity = 216.7f * ((humidity / 100.0f) * 6.112f * exp((17.62f * temperature) / (243.12f + temperature)) / (273.15f + temperature)); // [g/m^3]
    const uint32_t absoluteHumidityScaled = static_cast<uint32_t>(1000.0f * absoluteHumidity); // [mg/m^3]
    return absoluteHumidityScaled;
}

void setup() {
  Serial.begin(9600);
  Serial.println("SGP30 test");

  if (! sgp.begin()){
    Serial.println("Sensor not found ");
    while (1);
  }
  Serial.print("Found SGP30 serial #");
  Serial.print(sgp.serialnumber[0], HEX);
  Serial.print(sgp.serialnumber[1], HEX);
  Serial.println(sgp.serialnumber[2], HEX);

  // If you have a baseline measurement from before you can assign it to start, to 'self-calibrate'
  //sgp.setIAQBaseline(0x8E68, 0x8F41);  // Will vary for each sensor!
}

int counter = 0;
void loop() {
  // If you have a temperature / humidity sensor, you can set the absolute humidity to enable the humditiy compensation for the air quality signals
  //float temperature = 22.1; // [°C]
  //float humidity = 45.2; // [%RH]
  //sgp.setHumidity(getAbsoluteHumidity(temperature, humidity));

  if (! sgp.IAQmeasure()) {
    Serial.println("Measurement failed");
    return;
  }
  Serial.print("TVOC "); Serial.print(sgp.TVOC); Serial.print(" ppb\t");
  Serial.print("eCO2 "); Serial.print(sgp.eCO2); Serial.println(" ppm");
  delay(1000);

  counter++;
  if (counter == 30) {
    counter = 0;

    uint16_t TVOC_base, eCO2_base;
    if (! sgp.getIAQBaseline(&eCO2_base, &TVOC_base)) {
      Serial.println("Failed to get baseline readings");
      return;
    }
    Serial.print("****Baseline values: eCO2: 0x"); Serial.print(eCO2_base, HEX);
    Serial.print(" & TVOC: 0x"); Serial.println(TVOC_base, HEX);
  }
}[/mw_shl_code]

3、测试结果：



4、完整的工程源码请看这里：工程源码。

5、需要模块的，模块购买渠道：http://www.lingzhilab.com/index.php/home/goods/introduction?gid=550

芯片购买渠道：在芯间官方-http://www.zaixinjian.com/search?keyword=sgp30&value=product&page=1更多详细资料可到零知实验室官网免费获取。

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