RAK1906_Environment_BME680.ino

/**
   @file RAK1906_Environment_BEM680.ino
   @author rakwireless.com
   @brief Setup and read values from bme680 sensor
   @version 0.1
   @date 2020-12-28
   @copyright Copyright (c) 2020
**/

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME680.h> // Click to install library: http://librarymanager/All#Adafruit_BME680

Adafruit_BME680 bme;
// Might need adjustments
#define SEALEVELPRESSURE_HPA (1010.0)

void bme680_init()
{
  Wire.begin();

  if (!bme.begin(0x76)) {
    Serial.println("Could not find a valid BME680 sensor, check wiring!");
    return;
  }

  // Set up oversampling and filter initialization
  bme.setTemperatureOversampling(BME680_OS_8X);
  bme.setHumidityOversampling(BME680_OS_2X);
  bme.setPressureOversampling(BME680_OS_4X);
  bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
  bme.setGasHeater(320, 150); // 320*C for 150 ms
}

void bme680_get()
{
  Serial.print("Temperature = ");
  Serial.print(bme.temperature);
  Serial.println(" *C");

  Serial.print("Pressure = ");
  Serial.print(bme.pressure / 100.0);
  Serial.println(" hPa");

  Serial.print("Humidity = ");
  Serial.print(bme.humidity);
  Serial.println(" %");

  Serial.print("Gas = ");
  Serial.print(bme.gas_resistance / 1000.0);
  Serial.println(" KOhms");

  Serial.println();
}

void setup()
{
  // Initialize the built in LED
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);

  // Initialize Serial for debug output
  Serial.begin(115200);

  time_t serial_timeout = millis();
  // On nRF52840 the USB serial is not available immediately
  while (!Serial)
  {
    if ((millis() - serial_timeout) < 5000)
    {
      delay(100);
      digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
    }
    else
    {
      break;
    }
  }

  bme680_init();
}

void loop()
{
  if (! bme.performReading())
  {
    Serial.println("Failed to perform reading :(");
  }
  bme680_get();
  delay(5000);
}