[Arduino] GY-61 ADXL335 Accelerometer

x, y, z 3축 아날로그 출력 센서

//////////////////////////////////////////////////////////////////

//©2011 bildr

//Released under the MIT License - Please reuse change and share

//Simple code for the ADXL335, prints calculated orientation via serial

//////////////////////////////////////////////////////////////////

//Analog read pins

const int xPin = A3;

const int yPin = A2;

const int zPin = A1;

//The minimum and maximum values that came from

//the accelerometer while standing still

//You very well may need to change these

int minVal = 265;

int maxVal = 402;

//to hold the caculated values

double x;

double y;

double z;

void setup(){

  Serial.begin(9600); 

}

void loop(){

  //read the analog values from the accelerometer

  int xRead = analogRead(xPin);

  int yRead = analogRead(yPin);

  int zRead = analogRead(zPin);

  //convert read values to degrees -90 to 90 - Needed for atan2

  int xAng = map(xRead, minVal, maxVal, -90, 90);

  int yAng = map(yRead, minVal, maxVal, -90, 90);

  int zAng = map(zRead, minVal, maxVal, -90, 90);

  //Caculate 360deg values like so: atan2(-yAng, -zAng)

  //atan2 outputs the value of -π to π (radians)

  //We are then converting the radians to degrees

  x = RAD_TO_DEG * (atan2(-yAng, -zAng) + PI);

  y = RAD_TO_DEG * (atan2(-xAng, -zAng) + PI);

  z = RAD_TO_DEG * (atan2(-yAng, -xAng) + PI);

  //Output the caculations

  Serial.print("x: ");

  Serial.print(x);

  Serial.print(" | y: ");

  Serial.print(y);

  Serial.print(" | z: ");

  Serial.println(z);

  delay(1);//just here to slow down the serial output - Easier to read

}