Sensor - BMP280 - Temperatuur en Barometrische druk sensor

Hardware

Informatie (ENG)

Description:
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 and SPI!
This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Feature:
Model: GY-BMP280-3.3
Chip: BMP280
Power supply: 3 – 3.3V
Communication method: Standard IIC/SPI communication protocol
Air pressure range: 300-1100hPa
Pin pitch: 2.54mm
Module size: 11.5mm*15mm

Typical application:
– Enhancement of GPS navigation (e.g. time-to-first-fix improvement,dead-reckoning,slope detection)
– Indoor navigation (floor detection,elevator detection)
– Outdoor navigation,leisure and sports applications
– Weather forecast
– Health care application (e.g. sirometry)
– Vertical velocity indication (e.g. risk/sink speed)

Pinout


Pin:	Functie:
1	+3.3V (VCC)
2	GND
3	SCL Serial Clock (line)
4	SCA Serial Clock (data)
5	CSB (Chip Select)
6	SDO (Serial Data Out)

Arduino

Sluit de module aan volgens onderstaand overzicht:

Arduino pin:	BMP280 pin:
+5V	+5V (VCC)
GND	GND
A5	SCL Serial Clock (line)
A4	SCA Serial Clock (data)

Script met adafruit BMP280 bibliotheek

Bibliotheek module adres aanpassen

Het adres van deze module kan gewijzigd worden tussen 0x76 en 0x77 door de SD0 lijn op GND of +3.3v te zetten, te controleren met een I2C scanner:

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: -- -- -- -- -- -- -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- 76 --

Het adres kan je aanpassen in het bestand : Adafruit_BMP280.h

Pas deze regel aan, van:

#define BMP280_ADDRESS (0x77)

naar:

#define BMP280_ADDRESS (0x76)

Sluit de BMP module aan zoals hierboven aangegeven.

#include <Wire.h>

#include <SPI.h>

#include <Adafruit_Sensor.h>

#include <Adafruit_BMP280.h>

#define BMP_SCK 13

#define BMP_MISO 12

#define BMP_MOSI 11

#define BMP_CS 10

Adafruit_BMP280 bme; // I2C

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

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

void setup() {

Serial.begin(9600);

Serial.println(F("BMP280 test"));

if (!bme.begin()) {

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

while (1);

}

void loop() {

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

Serial.print(bme.readTemperature());

Serial.println(" *C");

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

Serial.print(bme.readPressure());

Serial.println(" Pa");

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

Serial.print(bme.readAltitude(1013.25)); // this should be adjusted to your local forcase

Serial.println(" m");

Serial.println();

delay(2000);

}

Het resultaat

Arduino Library

Installatie van Arduino IDE libraries: Arduino info

Wat heb je nodig?
1) Adafruit Sensor library

Adafruit BMP280 Library

Informatie (ENG)

About the BMP280

This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter!

Compatibility

MCU	Tested Works	Doesn’t Work	Not Tested	Notes
Atmega328 @ 16MHz	X
Atmega328 @ 12MHz	X
Atmega32u4 @ 16MHz	X			Use SDA/SCL on pins D2 & D3
Atmega32u4 @ 8MHz	X			Use SDA/SCL on pins D2 & D3
ESP8266	X			SDA/SCL default to pins 4 & 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL)
Atmega2560 @ 16MHz	X			Use SDA/SCL on pins 20 & 21
ATSAM3X8E	X			Use SDA/SCL on pins 20 & 21
ATSAM21D	X
ATtiny85 @ 16MHz		X
ATtiny85 @ 8MHz		X
Intel Curie @ 32MHz			X
STM32F2			X

ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
ESP8266 : Adafruit Huzzah
ATmega2560 @ 16MHz : Arduino Mega
ATSAM3X8E : Arduino Due
ATSAM21D : Arduino Zero, M0 Pro
ATtiny85 @ 16MHz : Adafruit Trinket 5V
ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V