# BME280
Arduino Source for the Bosch [BME280 MOD-1022 Weather Multi Sensor](http://www.embeddedadventures.com/bme280_weather_multi_sensor_mod-1022.html)


# Using the Library

 ```
 // need to read the NVM compensation parameters
 
  BME280.readCompensationParams();
  
  // Need to turn on 1x oversampling, default is os_skipped, which means it doesn't measure anything
  
  BME280.writeOversamplingPressure(os1x);  // 1x over sampling (ie, just one sample)
  BME280.writeOversamplingTemperature(os1x);
  BME280.writeOversamplingHumidity(os1x);
  
  // example of a forced sample.  After taking the measurement the chip goes back to sleep
  
  BME280.writeMode(smForced);
  while (BME280.isMeasuring()) {
    Serial.println("Measuring...");
    delay(50);
  }
  Serial.println("Done!");
  
  // read out the data - must do this before calling the getxxxxx routines
  
  BME280.readMeasurements();
  Serial.print("Temp=");
  Serial.println(BME280.getTemperature());  // must get temp first
  Serial.print("Humidity=");
  Serial.println(BME280.getHumidity());
  Serial.print("Pressure=");
  Serial.println(BME280.getPressure());
  Serial.print("PressureMoreAccurate=");
  Serial.println(BME280.getPressureMoreAccurate());  // use int64 calculcations
  Serial.print("TempMostAccurate=");
  Serial.println(BME280.getTemperatureMostAccurate());  // use double calculations
  Serial.print("HumidityMostAccurate=");
  Serial.println(BME280.getHumidityMostAccurate()); // use double calculations
  Serial.print("PressureMostAccurate=");
  Serial.println(BME280.getPressureMostAccurate()); // use double calculations
  ```
  
  To switch to "normal" mode, we measurements are made regularly and you can take advatage of the built in smoothing
  ```
  // Example for "indoor navigation"
  // We'll switch into normal mode for regular automatic samples
  
  BME280.writeStandbyTime(tsb_0p5ms);        // tsb = 0.5ms
  BME280.writeFilterCoefficient(fc_16);      // IIR Filter coefficient 16
  BME280.writeOversamplingPressure(os16x);    // pressure x16
  BME280.writeOversamplingTemperature(os2x);  // temperature x2
  BME280.writeOversamplingHumidity(os1x);     // humidity x1
  
  BME280.writeMode(smNormal);
   
  while (1) {
    
    
    while (BME280.isMeasuring()) {


    }
    
    // read out the data - must do this before calling the getxxxxx routines
    BME280.readMeasurements();
    printCompensatedMeasurements();
    
    delay(5000);	// do this every 5 seconds
    Serial.println();
  }
}
```