Grove多通道气体传感器不适用于Arduino mkr wifi 1010

Question

我的Grove多通道气体传感器有问题。当我尝试从传感器获取气体浓度时，它在串行监视器中返回"invalid ppm“(<0)。当我使用我的Arduino Uno时，它工作正常。它只给我带来了MKR的问题。我不明白为什么。我不是专家，但我没想到会这么难。代码如下：

#include <Wire.h>
#include "MutichannelGasSensor.h"

void setup()
{
  Serial.begin(115200); // start for output
  while (!SerialUSB) {

  }
  Serial.println("power on!");
  gas.begin(0x04);//the default I2C address of the slave is 0x04
  gas.powerOn();
  Serial.print("Firmware Version = ");
  Serial.println(gas.getVersion());
}

void loop()
{
  float c;

  c = -gas.measure_NH3();
  Serial.print("The concentration of NH3 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_CO();
  Serial.print("The concentration of CO is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_NO2();
  Serial.print("The concentration of NO2 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_C3H8();
  Serial.print("The concentration of C3H8 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_C4H10();
  Serial.print("The concentration of C4H10 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_CH4();
  Serial.print("The concentration of CH4 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_H2();
  Serial.print("The concentration of H2 is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  c = -gas.measure_C2H5OH();
  Serial.print("The concentration of C2H5OH is ");
  if (c >= 0) Serial.print(c);
  else Serial.print("invalid");
  Serial.println(" ppm");

  delay(1000);
  Serial.println("...");
}

Answer 1

尝试替换

c = -gas.measure..

使用

c =  gas.measure..