CO2-Ampel-DIY-Octopus-SCD30.ino

/* This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details. */
#include <SparkFun_SCD30_Arduino_Library.h>
#include <Wire.h>
#include <ESP8266WiFi.h>

int CO2 = 0 ;
//Reading CO2, humidity and temperature from the SCD30 By: Nathan Seidle SparkFun Electronics 

//https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library

SCD30 airSensorSCD30; // Objekt SDC30 Umweltsensor

void setup(){ // Einmalige Initialisierung
  WiFi.forceSleepBegin(); // Wifi off
  pinMode( 12 , OUTPUT);
  pinMode( 13 , OUTPUT);
  pinMode( 14 , OUTPUT);
  Wire.begin(); // ---- Initialisiere den I2C-Bus 

  if (Wire.status() != I2C_OK) Serial.println("Something wrong with I2C");

  if (airSensorSCD30.begin() == false) {
    Serial.println("The SCD30 did not respond. Please check wiring."); 
    while(1) {
      yield(); 
      delay(1);
    } 
  }

  airSensorSCD30.setAutoSelfCalibration(false); // Sensirion no auto calibration

  airSensorSCD30.setMeasurementInterval(2);     // CO2-Messung alle 5 s

  Serial.begin(115200);
  Serial.println();
  digitalWrite( 12 , LOW );

  digitalWrite( 13 , LOW );

  digitalWrite( 14 , LOW );

  Wire.setClock(100000L);            // 100 kHz SCD30 
  Wire.setClockStretchLimit(200000L);// CO2-SCD30
}

void loop() { // Kontinuierliche Wiederholung 
  CO2 = airSensorSCD30.getCO2() ;
  Serial.print("CO2:"+String(String(CO2)));
  Serial.println();
  if (( ( CO2 ) < ( 1000 ) ))
  {
    digitalWrite( 12 , LOW );
    digitalWrite( 13 , LOW );
    digitalWrite( 14 , HIGH );
    Serial.print("green");
    Serial.println();
  }
  else
  {
    if (( ( CO2 ) < ( 1400 ) ))
    {
      digitalWrite( 12 , LOW );
      digitalWrite( 13 , HIGH );
      digitalWrite( 14 , LOW );
      Serial.print("yellow");
      Serial.println();
    }
    else
    {
      digitalWrite( 12 , HIGH );
      digitalWrite( 13 , LOW );
      digitalWrite( 14 , LOW );
      Serial.print("red");
      Serial.println();
    }
  }
  delay( 2000 );
}