67 lines
2.1 KiB
Arduino
67 lines
2.1 KiB
Arduino
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#include <Wire.h>
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#include <Adafruit_BMP085.h>
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/***************************************************
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This is an example for the BMP085 Barometric Pressure & Temp Sensor
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Designed specifically to work with the Adafruit BMP085 Breakout
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----> https://www.adafruit.com/products/391
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These displays use I2C to communicate, 2 pins are required to
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interface
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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BSD license, all text above must be included in any redistribution
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****************************************************/
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// Connect VCC of the BMP085 sensor to 3.3V (NOT 5.0V!)
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// Connect GND to Ground
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// Connect SCL to i2c clock - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 5
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// Connect SDA to i2c data - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 4
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// EOC is not used, it signifies an end of conversion
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// XCLR is a reset pin, also not used here
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Adafruit_BMP085 bmp;
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void setup() {
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Serial.begin(9600);
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if (!bmp.begin()) {
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Serial.println("Could not find a valid BMP085 sensor, check wiring!");
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while (1) {}
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}
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}
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void loop() {
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Serial.print("Temperature = ");
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Serial.print(bmp.readTemperature());
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Serial.println(" *C");
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Serial.print("Pressure = ");
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Serial.print(bmp.readPressure());
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Serial.println(" Pa");
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// Calculate altitude assuming 'standard' barometric
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// pressure of 1013.25 millibar = 101325 Pascal
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Serial.print("Altitude = ");
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Serial.print(bmp.readAltitude());
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Serial.println(" meters");
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Serial.print("Pressure at sealevel (calculated) = ");
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Serial.print(bmp.readSealevelPressure());
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Serial.println(" Pa");
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// you can get a more precise measurement of altitude
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// if you know the current sea level pressure which will
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// vary with weather and such. If it is 1015 millibars
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// that is equal to 101500 Pascals.
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Serial.print("Real altitude = ");
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Serial.print(bmp.readAltitude(101500));
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Serial.println(" meters");
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Serial.println();
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delay(500);
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}
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