เซ็นเซอร์ GY-271 QMC5883L 3-axis Magnetic field วัดสนามแม่เหล็ก 3 แกน

เซ็นเซอร์GY-271 QMC5883L 3-axis  Magnetic field วัดสนามแม่เหล็ก 3 แกน 

Name: Q MC5883L module (three-axis magnetic field module)

Model: GY-271 using chip: Q MC5883L

Power supply: 3-5v

Communication method: IIC communication protocol

Measuring range: ±1.3-8 Gauss

ติดตั้ง library ก่อนใช้งาน

U8g2 library: https://github.com/SGBotic/U8g2_Arduino

QMC5883L : https://github.com/e-Gizmo/QMC5883L-GY-271-Compass-module/blob/master/QMC5883L.rar?raw=true

      GY-271 QMC5883L 3-axis  Magnetic field

#include "Arduino.h"

#include "U8g2lib.h"

#include "Wire.h"

#include "QMC5883L.h"

QMC5883L compass;

 U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE); 
// U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

void setup(void) {

  Wire.begin();

  Serial.begin(115200);

  compass.init();

  u8g2.begin();  

}

void loop(void) {

  int x,y,z;

  compass.read(&x,&y,&z);

  float heading = atan2(y, x);

  float declinationAngle = 0.0404;

  heading += declinationAngle;

   if(heading < 0)

    heading += 2*PI;

  if(heading > 2*PI)

    heading -= 2*PI;

  float headingDegrees = heading * 180/M_PI; 

  u8g2.firstPage();

  do {

   u8g2.setFont(u8g2_font_ncenB10_tr);

    u8g2.drawStr(2,15,"x :");

    u8g2.setCursor(20, 15);

            u8g2.print(x);

    u8g2.drawStr(2,30,"y :");

        u8g2.setCursor(20, 30);

            u8g2.print(y);

    u8g2.drawStr(2,45,"z :");

       u8g2.setCursor(20, 45);

            u8g2.print(z);

    u8g2.drawStr(2,60,"Radius:");  

     u8g2.setCursor(65, 60);

            u8g2.print(headingDegrees);

  } while ( u8g2.nextPage() );

}