LED IMU Toggle

led_toggle.ino

// LED Toggle
//  Luke Tuthill for the University of Sydney

#include "CurieIMU.h"

// Green LED on pin 3
#define GREEN 3

void setup() {
    // Setup the IMU
    CurieIMU.begin();

    // Set the Accelerometer range - how fast you can move it
    //  without it capping
    CurieIMU.setAccelerometerRange(2);

    // Begin debug serial print
    Serial.begin(9600);
    
    // Output pin
    pinMode(GREEN, OUTPUT);
}

void loop() {
    // Three ints to store the position
    int ax, ay, az;

    // This function fills ax, ay, and az with the values it needs
    //  (after calling this function, ax ay and az will have changed
    CurieIMU.readAccelerometer(ax, ay, az);

    // Print to serial
    Serial.print(ax);
    Serial.print(" ");
    Serial.print(ay);
    Serial.print(" ");
    Serial.println(az);

    if (az < 0) {
        // If az is less than zero (right way up), turn on the LED
        digitalWrite(GREEN, HIGH);
    } else {
        // Else, turn it off
        digitalWrite(GREEN, LOW);
    }
}