Triple Axis Accelerometer Breakout - ADXL345

I have managed to get the arduino to recognise the accelerometer but I cant work out the if/else code so that it recognises different movements.

any help would be awesome!!

You'll need to post your code for us to see the if/else you're referring to.

#include <Wire.h>

#define DEVICE (0x53) //ADXL345 device address
#define TO_READ (6) //num of bytes we are going to read each time (two bytes for each axis)

byte buff[TO_READ] ; //6 bytes buffer for saving data read from the device
char str[512]; //string buffer to transform data before sending it to the serial port

void setup()
{
Wire.begin(); // join i2c bus (address optional for master)
Serial.begin(9600); // start serial for output

//Turning on the ADXL345
writeTo(DEVICE, 0x2D, 0);
writeTo(DEVICE, 0x2D, 16);
writeTo(DEVICE, 0x2D, 8);
}

void loop()
{
int regAddress = 0x32; //first axis-acceleration-data register on the ADXL345
int x, y, z;

readFrom(DEVICE, regAddress, TO_READ, buff); //read the acceleration data from the ADXL345

//each axis reading comes in 10 bit resolution, ie 2 bytes. Least Significat Byte first!!
//thus we are converting both bytes in to one int
x = (((int)buff[1]) << 8) | buff[0];
y = (((int)buff[3])<< 8) | buff[2];
z = (((int)buff[5]) << 8) | buff[4];

//we send the x y z values as a string to the serial port
sprintf(str, "%d %d %d", x, y, z);
Serial.print(str);
Serial.print(10, BYTE);

//It appears that delay is needed in order not to clog the port
delay(1000);
}

//---------------- Functions
//Writes val to address register on device
void writeTo(int device, byte address, byte val) {
Wire.beginTransmission(device); //start transmission to device
Wire.send(address); // send register address
Wire.send(val); // send value to write
Wire.endTransmission(); //end transmission
}

//reads num bytes starting from address register on device in to buff array
void readFrom(int device, byte address, int num, byte buff[]) {
Wire.beginTransmission(device); //start transmission to device
Wire.send(address); //sends address to read from
Wire.endTransmission(); //end transmission

Wire.beginTransmission(device); //start transmission to device
Wire.requestFrom(device, num); // request 6 bytes from device

int i = 0;
while(Wire.available()) //device may send less than requested (abnormal)
{
buff = Wire.receive(); // receive a byte

  • i++;*
  • }*
  • Wire.endTransmission(); //end transmission*
    }
    if (

thats the code i have so far, all i want to the arduino to do is recognise when the accelerometer has been picked up, then put down again, by displaying a simple message in the serial monitor.

Picking up would imply some movement in the Z axis, so that's the one I'd monitor.
You'd need to detect some acceleration over a threshold for more than, say, 100ms.

Please use the # icon in the editor when posting code.