Naman Chauhan
Published © GPL3+

Using 9 Axes Motion Shield with Arduino

The Arduino 9 Axes Motion Shield allows your Arduino to measure movement: orientation, acceleration and magnetic field.

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Using 9 Axes Motion Shield with Arduino

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Arduino 9 Axes Motion Shield
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

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Code

Accelerometer using 9 AXES MOTION SHIELD

C/C++
#include "NAxisMotion.h"
#include <Wire.h>
 
//Object that for the sensor
NAxisMotion mySensor;
 
//Flag to indicate if an interrupt was detected
bool intDetected = false;
 
//At a Range of 4g, the threshold
//is set at 39.05mg or 0.3830m/s2.
//This Range is the default for NDOF Mode
int threshold = 5;
 
//At a filter Bandwidth of 62.5Hz,
//the duration is 8ms.
//This Bandwidth is the default for NDOF Mode
int duration = 1;
 
//To know which interrupt was triggered
bool anyMotion = true;
 
//This code is executed once
void setup() {
  //Peripheral Initialization
 
  //Initialize the Serial Port to view information on the Serial Monitor
  Serial.begin(115200);
 
  //Initialize I2C communication to the let the library communicate with the sensor.
  I2C.begin();
 
  //Sensor Initialization
  Serial.println("Please wait. Initialization in process.");
 
  //The I2C Address can be changed here inside this function in the library
  mySensor.initSensor();
  mySensor.setOperationMode(OPERATION_MODE_NDOF);
 
  //Can be configured to other operation modes as desired
  mySensor.setUpdateMode(MANUAL);
  //The default is AUTO. Changing to manual requires
  //calling the relevant update functions prior to calling the read functions
 
  //Setting to MANUAL  requires lesser reads to the sensor
 
  //Attach the interrupt to the Interrupt Service Routine
  //for a Rising Edge. Change the interrupt pin depending on the board
  attachInterrupt(INT_PIN, motionISR, RISING);
 
  //Setup the initial interrupt to trigger at No Motion
  mySensor.resetInterrupt();
  mySensor.enableSlowNoMotion(threshold, duration, NO_MOTION);
  anyMotion = false;
 
  //Accelerometer interrupts can be triggered from all 3 axes
  mySensor.accelInterrupts(ENABLE, ENABLE, ENABLE);
 
  Serial.println("This is a game to test how steady you can move an object with one hand. \n
                            Keep the device on a table and mark 2 points.");
 
  Serial.println("Move the Device from one place to another
                            without triggering the Any Motion Interrupt.\n\n");
 
  delay(1000); //Delay for the player(s) to read
  Serial.println("Move the device around and then place it at one position.\n
                            Change the threshold and duration to increase the difficulty level.");
 
  Serial.println("Have fun!\n\n"); 
}
 
void loop() //This code is looped forever
{
  if (intDetected)
  {
    if (anyMotion)
    {
      Serial.println("You moved!! Try again. Keep the Device at one place.\n");
      intDetected = false;
      
      //Reset the interrupt line
      mySensor.resetInterrupt();
      
      //Disable the Any motion interrupt
      mySensor.disableAnyMotion();
      
      //Enable the No motion interrupt
      //(can also use the Slow motion instead)
      mySensor.enableSlowNoMotion(threshold, duration, NO_MOTION);
      anyMotion = false;
    }
    else
    {
      Serial.println("Device is not moving. You may start again.\n\n\n");
      intDetected = false;
      
      //Reset the interrupt line
      mySensor.resetInterrupt();
      
      //Disable the Slow or No motion interrupt
      mySensor.disableSlowNoMotion();
      
      //Enable the Any motion interrupt
      mySensor.enableAnyMotion(threshold, duration);
      anyMotion = true;
    }
  }
}
 
//Interrupt Service Routine
//when the sensor triggers an Interrupt
void motionISR() {
  intDetected = true;
}

Credits

Naman Chauhan

Naman Chauhan

41 projects • 129 followers
Programmer, electronic adept masquerading as Computer Science student. Email for Cooperation/Sponsorships to chauhannaman98@gmail.com

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