เซ็นเซอร์วัดอุณหภูมิ/ความกดอากาศ/ความสูงที่วัดจากระดับน้ำทะเล BMP280 -3.3v  High precision Atmospheric Pressure Sensor(ระวังสับสนกับ BME280 ไม่เหมือนกัน)

Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C & SPI! This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barmetric pressuer with ± hPa absolute accuracy, & etmperature with ±1.0°C accuracy. Because pressure changes with altitude, & the pressure measuremenets are so good, you can also use it as an altimeter with ± meter accuracy.

Quick Spec

• Model: GY-BMP280-3.3
• Chip: BMP280
• Power Supply: 3V
• Communication Method: Standard IIC/SPI Communication Protocol
• Air Pressure Range: 300-1100hPa
• Pin Pitch: 2.54mm
• Module Size: 11.5mm*15mm

• VCC > Arduino VCC (3.3 V)
• GND > Arduino GND
• SCL > Arduino A5
• SDA > Arduino A4

Code:Example

/***************************************************************************

  This is a library for the BMP280 humidity, temperature & pressure sensor

 

  Designed specifically to work with the Adafruit BMEP280 Breakout

  ----> http://www.adafruit.com/products/2651

 

  These sensors use I2C or SPI to communicate, 2 or 4 pins are required

  to interface.

 

  Adafruit invests time and resources providing this open source code,

  please support Adafruit andopen-source hardware by purchasing products

  from Adafruit!

 

  Written by Limor Fried & Kevin Townsend for Adafruit Industries.

  BSD license, all text above must be included in any redistribution

 ***************************************************************************/

 

#include "Wire.h"

#include "SPI.h"

#include "Adafruit_BMP280.h"

 

#define BMP_SCK  (13)

#define BMP_MISO (12)

#define BMP_MOSI (11)

#define BMP_CS   (10)

 

Adafruit_BMP280 bmp; // I2C

//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI

//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO,  BMP_SCK);

 

void setup() {

  Serial.begin(9600);

  Serial.println(F("BMP280 test"));

 

  if (!bmp.begin(0x76)) {

    Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));

    while (1);

  }

 

  /* Default settings from datasheet. */

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */

                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */

                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */

                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */

                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */

}

 

void loop() {

    Serial.print(F("Temperature = "));

    Serial.print(bmp.readTemperature());

    Serial.println(" *C");

 

    Serial.print(F("Pressure = "));

    Serial.print(bmp.readPressure()/100);

    Serial.println(" mbar");

 

    Serial.print(F("Approx altitude = "));

    Serial.print(bmp.readAltitude(1013.25)); /* Adjusted to local forecast! */

    Serial.println(" m");

 

    Serial.println();

    delay(2000);

}