arduinoprojects

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Example6_TwentyMinuteTest.ino (3467B)

      1 /******************************************************************************
      2   Run for 20 minutes
      3 
      4   Nathan Seidle @ SparkFun Electronics
      5   Marshall Taylor @ SparkFun Electronics
      6 
      7   April 4, 2017
      8 
      9   https://github.com/sparkfun/CCS811_Air_Quality_Breakout
     10   https://github.com/sparkfun/SparkFun_CCS811_Arduino_Library
     11 
     12   Hardware Connections (Breakoutboard to Arduino):
     13   3.3V to 3.3V pin
     14   GND to GND pin
     15   SDA to A4
     16   SCL to A5
     17 
     18   Calculates the current run time and indicates when 20 minutes has passed
     19 
     20   Read the TVOC and CO2 values from the SparkFun CSS811 breakout board
     21 
     22   A new sensor requires at 48-burn in. Once burned in a sensor requires
     23   20 minutes of run in before readings are considered good.
     24 
     25   Resources:
     26   Uses Wire.h for i2c operation
     27 
     28   Development environment specifics:
     29   Arduino IDE 1.8.1
     30 
     31   This code is released under the [MIT License](http://opensource.org/licenses/MIT).
     32 
     33   Please review the LICENSE.md file included with this example. If you have any questions
     34   or concerns with licensing, please contact techsupport@sparkfun.com.
     35 
     36   Distributed as-is; no warranty is given.
     37 ******************************************************************************/
     38 #include <Wire.h>
     39 
     40 #include "SparkFunCCS811.h" //Click here to get the library: http://librarymanager/All#SparkFun_CCS811
     41 
     42 #define CCS811_ADDR 0x5B //Default I2C Address
     43 //#define CCS811_ADDR 0x5A //Alternate I2C Address
     44 
     45 CCS811 myCCS811(CCS811_ADDR);
     46 
     47 void setup()
     48 {
     49   Serial.begin(115200);
     50   Serial.println("20 minute test");
     51 
     52   Wire.begin();
     53 
     54   //This begins the CCS811 sensor and prints error status of .beginWithStatus()
     55   CCS811Core::CCS811_Status_e returnCode = myCCS811.beginWithStatus();
     56   Serial.print("CCS811 begin exited with: ");
     57   Serial.println(myCCS811.statusString(returnCode));
     58 }
     59 
     60 void loop()
     61 {
     62   if (myCCS811.dataAvailable())
     63   {
     64     myCCS811.readAlgorithmResults();
     65 
     66     Serial.print("CO2[");
     67     Serial.print(myCCS811.getCO2());
     68     Serial.print("] tVOC[");
     69     Serial.print(myCCS811.getTVOC());
     70     Serial.print("] millis[");
     71     Serial.print(millis());
     72     Serial.print("] ");
     73     printRunTime();
     74     Serial.println();
     75   }
     76   else if (myCCS811.checkForStatusError())
     77   {
     78     printSensorError();
     79   }
     80 
     81   delay(1000); //Wait for next reading
     82 }
     83 
     84 //Prints the amount of time the board has been running
     85 //Does the hour, minute, and second calcs
     86 void printRunTime()
     87 {
     88   char buffer[50];
     89 
     90   unsigned long runTime = millis();
     91 
     92   int hours = runTime / (60 * 60 * 1000L);
     93   runTime %= (60 * 60 * 1000L);
     94   int minutes = runTime / (60 * 1000L);
     95   runTime %= (60 * 1000L);
     96   int seconds = runTime / 1000L;
     97 
     98   sprintf(buffer, "RunTime[%02d:%02d:%02d]", hours, minutes, seconds);
     99   Serial.print(buffer);
    100 
    101   if (hours == 0 && minutes < 20)
    102     Serial.print(" Not yet valid");
    103 }
    104 
    105 //printSensorError gets, clears, then prints the errors
    106 //saved within the error register.
    107 void printSensorError()
    108 {
    109   uint8_t error = myCCS811.getErrorRegister();
    110 
    111   if (error == 0xFF) //comm error
    112   {
    113     Serial.println("Failed to get ERROR_ID register.");
    114   }
    115   else
    116   {
    117     Serial.print("Error: ");
    118     if (error & 1 << 5)
    119       Serial.print("HeaterSupply");
    120     if (error & 1 << 4)
    121       Serial.print("HeaterFault");
    122     if (error & 1 << 3)
    123       Serial.print("MaxResistance");
    124     if (error & 1 << 2)
    125       Serial.print("MeasModeInvalid");
    126     if (error & 1 << 1)
    127       Serial.print("ReadRegInvalid");
    128     if (error & 1 << 0)
    129       Serial.print("MsgInvalid");
    130     Serial.println();
    131   }
    132 }