Hello,
SparkFun example sketch "Example1_BasicReadings.ino" works fine: it prints the values to serial.
But when I try to assign pressure value to float variable and print the variable I get only zeroes.
Can't figure out why is that...how should I do assigning pressure to variable?
Sketch and serial output are below. Otherwise it's mentioned example sketch, but I added couple of lines saying //added in the end.
/*
Get basic environmental readings from the BME280
By: Nathan Seidle
SparkFun Electronics
Date: March 9th, 2018
License: This code is public domain but you buy me a beer if you use this and we meet someday (Beerware license).
Feel like supporting our work? Buy a board from SparkFun!
https://www.sparkfun.com/products/14348 - Qwiic Combo Board
https://www.sparkfun.com/products/13676 - BME280 Breakout Board
This example shows how to read humidity, pressure, and current temperature from the BME280 over I2C.
Hardware connections:
BME280 -> Arduino
GND -> GND
3.3 -> 3.3
SDA -> A4
SCL -> A5
*/
#include <Wire.h>
#include "SparkFunBME280.h"
BME280 mySensor;
float airPressureSensor; // added
void setup()
{
Serial.begin(115200);
Serial.println("Reading basic values from BME280");
Wire.begin();
if (mySensor.beginI2C() == false) //Begin communication over I2C
{
Serial.println("The sensor did not respond. Please check wiring.");
while(1); //Freeze
}
}
void loop()
{
Serial.print("Humidity: ");
Serial.print(mySensor.readFloatHumidity(), 0);
Serial.print(" Pressure: ");
Serial.print(mySensor.readFloatPressure(), 0);
Serial.print(" airPressureSensor: "); //added
airPressureSensor = (mySensor.readFloatPressure(), 0); //added
Serial.print(airPressureSensor); //added
Serial.print(" Alt: ");
//Serial.print(mySensor.readFloatAltitudeMeters(), 1);
Serial.print(mySensor.readFloatAltitudeFeet(), 1);
Serial.print(" Temp: ");
//Serial.print(mySensor.readTempC(), 2);
Serial.print(mySensor.readTempF(), 2);
Serial.println();
delay(50);
}
Serial output:
Humidity: 38 Pressure: 99702 airPressureSensor: 0.00 Alt: 446.0 Temp: 72.18
Humidity: 38 Pressure: 99704 airPressureSensor: 0.00 Alt: 445.5 Temp: 72.16
Humidity: 38 Pressure: 99698 airPressureSensor: 0.00 Alt: 447.2 Temp: 72.18
Humidity: 38 Pressure: 99704 airPressureSensor: 0.00 Alt: 445.5 Temp: 72.16
Humidity: 38 Pressure: 99698 airPressureSensor: 0.00 Alt: 448.0 Temp: 72.18
Humidity: 38 Pressure: 99702 airPressureSensor: 0.00 Alt: 446.3 Temp: 72.18
Thanks,
Tipo