hello,a few days back i've had the same problem,
though i have arduino mega 2560,
there are two things that I would change.
solder pins to the accelerometer,
and in your code,
before void setup()
seems that I'm missing
library declaration for ADXL345
and this is how it is looking on my setup (i've dumped serial for LCD)
and this is how my code looks like (pin setting is for mega, with SDA, SCL @ 21 and 22)
#include <Wire.h>
// include the library code for ADXL345:
#include <ADXL345.h>
// include the library code for LCD:
#include <LiquidCrystal.h>
// initialize the LCD library with the numbers of the interface pins
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
ADXL345 adxl; //variable adxl is an instance of the ADXL345 library
void setup(){
// set up the LCD's number of columns and rows:
lcd.begin(20, 4);
// Print a message to the LCD.
lcd.print("Czas od resetu:");
adxl.powerOn();
//code from old sample code attached to the library.
//set activity/ inactivity thresholds (0-255)
adxl.setActivityThreshold(75); //62.5mg per increment
adxl.setInactivityThreshold(75); //62.5mg per increment
adxl.setTimeInactivity(10); // how many seconds of no activity is inactive?
//look of activity movement on this axes - 1 == on; 0 == off
adxl.setActivityX(1);
adxl.setActivityY(1);
adxl.setActivityZ(1);
//look of inactivity movement on this axes - 1 == on; 0 == off
adxl.setInactivityX(1);
adxl.setInactivityY(1);
adxl.setInactivityZ(1);
//look of tap movement on this axes - 1 == on; 0 == off
adxl.setTapDetectionOnX(0);
adxl.setTapDetectionOnY(0);
adxl.setTapDetectionOnZ(1);
//set values for what is a tap, and what is a double tap (0-255)
adxl.setTapThreshold(50); //62.5mg per increment
adxl.setTapDuration(15); //625?s per increment
adxl.setDoubleTapLatency(80); //1.25ms per increment
adxl.setDoubleTapWindow(200); //1.25ms per increment
//set values for what is considered freefall (0-255)
adxl.setFreeFallThreshold(7); //(5 - 9) recommended - 62.5mg per increment
adxl.setFreeFallDuration(45); //(20 - 70) recommended - 5ms per increment
//setting all interupts to take place on int pin 1
//I had issues with int pin 2, was unable to reset it
adxl.setInterruptMapping( ADXL345_INT_SINGLE_TAP_BIT, ADXL345_INT1_PIN );
adxl.setInterruptMapping( ADXL345_INT_DOUBLE_TAP_BIT, ADXL345_INT1_PIN );
adxl.setInterruptMapping( ADXL345_INT_FREE_FALL_BIT, ADXL345_INT1_PIN );
adxl.setInterruptMapping( ADXL345_INT_ACTIVITY_BIT, ADXL345_INT1_PIN );
adxl.setInterruptMapping( ADXL345_INT_INACTIVITY_BIT, ADXL345_INT1_PIN );
//register interupt actions - 1 == on; 0 == off
adxl.setInterrupt( ADXL345_INT_SINGLE_TAP_BIT, 1);
adxl.setInterrupt( ADXL345_INT_DOUBLE_TAP_BIT, 1);
adxl.setInterrupt( ADXL345_INT_FREE_FALL_BIT, 1);
adxl.setInterrupt( ADXL345_INT_ACTIVITY_BIT, 1);
adxl.setInterrupt( ADXL345_INT_INACTIVITY_BIT, 1);
}
void loop(){
//Boring accelerometer stuff
int x,y,z;
adxl.readAccel(&x, &y, &z); //read the accelerometer values and store them in variables x,y,z
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
lcd.print(" sek");
lcd.setCursor(0, 2);
//prints X, Y, Z values on to LCD
lcd.print("x:");
lcd.print(x);
lcd.print(" ");
lcd.print("y:");
lcd.print(y);
lcd.print(" ");
lcd.print("z:");
lcd.print(z);
lcd.print(" ");
delay(150);
}
and the one website with great writeup I've used to get my thing to run.
http://bildr.org/2011/03/adxl345-arduino/
