ESPEasy/lib/SparkFun SCD4x Arduino Library/examples/Example2_LowPowerReadings/Example2_LowPowerReadings.ino

/*
  Reading CO2, humidity and temperature from the SCD4x in Low Power mode
  By: Paul Clark
  Based on earlier code by: Nathan Seidle
  SparkFun Electronics
  Date: June 3rd, 2021
  License: MIT. See license file for more information but you can
  basically do whatever you want with this code.

  Feel like supporting open source hardware?
  Buy a board from SparkFun! https://www.sparkfun.com/products/18365

  This example prints the current CO2 level, relative humidity, and temperature in C.

  Hardware Connections:
  Attach RedBoard to computer using a USB cable.
  Connect SCD40/41 to RedBoard using Qwiic cable.
  Open Serial Monitor at 115200 baud.
*/

#include <Wire.h>

#include "SparkFun_SCD4x_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_SCD4x
SCD4x mySensor;

void setup()
{
  Serial.begin(115200);
  Serial.println(F("SCD4x Example"));
  Wire.begin();

  //mySensor.enableDebugging(); // Uncomment this line to get helpful debug messages on Serial

  //.begin will start periodic measurements for us (see the later examples for details on how to override this)
  if (mySensor.begin() == false)
  {
    Serial.println(F("Sensor not detected. Please check wiring. Freezing..."));
    while (1)
      ;
  }

  //By default, the SCD4x has data ready every five seconds.
  //We can enable low power operation and receive a reading every ~30 seconds

  //But first, we need to stop periodic measurements otherwise startLowPowerPeriodicMeasurement will fail
  if (mySensor.stopPeriodicMeasurement() == true)
  {
    Serial.println(F("Periodic measurement is disabled!"));
  }  

  //Now we can enable low power periodic measurements
  if (mySensor.startLowPowerPeriodicMeasurement() == true)
  {
    Serial.println(F("Low power mode enabled!"));
  }

  //The SCD4x has data ready every thirty seconds
}

void loop()
{
  if (mySensor.readMeasurement()) // readMeasurement will return true when fresh data is available
  {
    Serial.println();

    Serial.print(F("CO2(ppm):"));
    Serial.print(mySensor.getCO2());

    Serial.print(F("\tTemperature(C):"));
    Serial.print(mySensor.getTemperature(), 1);

    Serial.print(F("\tHumidity(%RH):"));
    Serial.print(mySensor.getHumidity(), 1);

    Serial.println();
  }
  else
    Serial.print(F("."));

  delay(1000);
}