bsnayak
Newbie level 4
Hello ,
I have recently bought some sensors ADXL337 and ADXL 377 from Sprakfun. I have connected both the sensors with Arduino Mega KIIT. I am using the sample code given in Github. Here is it .
However the output of this code is as follows.
Here is the result in X UP, X Down, Y UP, Y Down, Z UP, Z Down
I am not sure, if it is correct (?????????). I would expect the Acceleration in the Z direction to be nearly 1g. However it is showing in the Y direction net accelration is nearly 1g. If the sensors are damaged or should i manupulate the analog pins in the X,Y,Z directions??
I have recently bought some sensors ADXL337 and ADXL 377 from Sprakfun. I have connected both the sensors with Arduino Mega KIIT. I am using the sample code given in Github. Here is it .
Code:
// Declaration of all necessary header file
// Inspired with example file of Sparkfun ADXL337/377
#include "Wire.h"
#include <SPI.h>
// Declarations of Parameters
int scale_ADXL337 = 3; // 3 (±3g) for ADXL337, 200 (±200g) for ADXL377
int scale_ADXL377 = 200;// 3 (±3g) for ADXL337, 200 (±200g) for ADXL377
float rawX_ADXL337, rawY_ADXL337, rawZ_ADXL337; // Raw values for each axis of Sensor ADXL337
float rawX_ADXL377, rawY_ADXL377, rawZ_ADXL377; // Raw values for each axis of Sensor ADXL377
float scaledX_ADXL337, scaledY_ADXL337, scaledZ_ADXL337; // Scaled values for each axis of Sensor ADXL337
float scaledX_ADXL377, scaledY_ADXL377, scaledZ_ADXL377; // Scaled values for each axis of Sensor ADXL377
boolean micro_is_5V = false; // Set to true if using a 5V microcontroller such as the Arduino Uno, false if using a 3.3V microcontroller, this affects the interpretation of the sensor data
void setup()
{
// Initialize serial communication at 115200 baud
Serial.begin(115200);
Serial.print("The Accelerometer ADXL377 and ADXL337 are connected to the MEGA BOARD");
Serial.println();
}
// Read, scale_ADXL337, and print accelerometer data
void loop()
{
// Get raw accelerometer data for each axis
rawX_ADXL377 = analogRead(A0);
rawY_ADXL377 = analogRead(A1);
rawZ_ADXL377 = analogRead(A2);
rawX_ADXL337 = analogRead(A3);
rawY_ADXL337 = analogRead(A4);
rawZ_ADXL337 = analogRead(A5);
scaledX_ADXL377 = mapf(rawX_ADXL377, 0, 1023, -scale_ADXL377, scale_ADXL377);
scaledY_ADXL377 = mapf(rawY_ADXL377, 0, 1023, -scale_ADXL377, scale_ADXL377);
scaledZ_ADXL377 = mapf(rawZ_ADXL377, 0, 1023, -scale_ADXL377, scale_ADXL377);
scaledX_ADXL337 = mapf(rawX_ADXL337, 0, 1023, -scale_ADXL337, scale_ADXL337);
scaledY_ADXL337 = mapf(rawY_ADXL337, 0, 1023, -scale_ADXL337, scale_ADXL337);
scaledZ_ADXL337 = mapf(rawZ_ADXL337, 0, 1023, -scale_ADXL337, scale_ADXL337);
Serial.println();
Serial.println("--------------------------------------------------------------------");
// Print out raw X,Y,Z accelerometer readings of ADXL337
Serial.print("X_377: "); Serial.println(rawX_ADXL337);
Serial.print("Y_377: "); Serial.println(rawY_ADXL337);
Serial.print("Z_377: "); Serial.println(rawZ_ADXL337);
Serial.println();
// Print out scaled X,Y,Z accelerometer readings of ADXL337
Serial.print("Scaled_X_377: "); Serial.print(scaledX_ADXL337); Serial.println(" g");
Serial.print("Scaled_Y_377: "); Serial.print(scaledY_ADXL337); Serial.println(" g");
Serial.print("Scaled_Z_377: "); Serial.print(scaledZ_ADXL337); Serial.println(" g");
Serial.println();
// Print out raw X,Y,Z accelerometer readings of ADXL337
Serial.print("X_337: "); Serial.println(rawX_ADXL337);
Serial.print("Y_337: "); Serial.println(rawY_ADXL337);
Serial.print("Z_337: "); Serial.println(rawZ_ADXL337);
Serial.println();
// Print out scaled X,Y,Z accelerometer readings of ADXL337
Serial.print("Scaled_X_337: "); Serial.print(scaledX_ADXL337); Serial.println(" g");
Serial.print("Scaled_Y_337: "); Serial.print(scaledY_ADXL337); Serial.println(" g");
Serial.print("Scaled_Z_337: "); Serial.print(scaledZ_ADXL337); Serial.println(" g");
Serial.println();
Serial.println("--------------------------------------------------------------------\n");
delay(250); // Minimum delay of 2 milliseconds between sensor reads (500 Hz)
}
// Same functionality as Arduino's standard map function, except using floats
float mapf(float x, float in_min, float in_max, float out_min, float out_max)
{
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}However the output of this code is as follows.
Code:
X_377: 362.00
Y_377: 339.00
Z_377: 419.00
Scaled_X_377: -0.88 g
Scaled_Y_377: -1.01 g
Scaled_Z_377: -0.54 g
X_337: 362.00
Y_337: 339.00
Z_337: 419.00
Scaled_X_337: -0.88 g
Scaled_Y_337: -1.01 g
Scaled_Z_337: -0.54 g
--------------------------------------------------------------------
--------------------------------------------------------------------
X_377: 361.00
Y_377: 339.00
Z_377: 419.00
Scaled_X_377: -0.88 g
Scaled_Y_377: -1.01 g
Scaled_Z_377: -0.54 g
X_337: 361.00
Y_337: 339.00
Z_337: 419.00
Scaled_X_337: -0.88 g
Scaled_Y_337: -1.01 g
Scaled_Z_337: -0.54 g
--------------------------------------------------------------------Here is the result in X UP, X Down, Y UP, Y Down, Z UP, Z Down
Code:
X UP
X_377: 362.00
Y_377: 339.00
Z_377: 421.00
Scaled_X_377: -0.88 g
Scaled_Y_377: -1.01 g
Scaled_Z_377: -0.53 g
X_337: 362.00
Y_337: 339.00
Z_337: 421.00
Scaled_X_337: -0.88 g
Scaled_Y_337: -1.01 g
Scaled_Z_337: -0.53 g
X down
X_377: 364.00
Y_377: 342.00
Z_377: 420.00
Scaled_X_377: -0.87 g
Scaled_Y_377: -0.99 g
Scaled_Z_377: -0.54 g
X_337: 364.00
Y_337: 342.00
Z_337: 420.00
Scaled_X_337: -0.87 g
Scaled_Y_337: -0.99 g
Scaled_Z_337: -0.54 g
Y up
X_377: 364.00
Y_377: 343.00
Z_377: 420.00
Scaled_X_377: -0.87 g
Scaled_Y_377: -0.99 g
Scaled_Z_377: -0.54 g
X_337: 364.00
Y_337: 343.00
Z_337: 420.00
Scaled_X_337: -0.87 g
Scaled_Y_337: -0.99 g
Scaled_Z_337: -0.54 g
Y down
X_377: 361.00
Y_377: 339.00
Z_377: 421.00
Scaled_X_377: -0.88 g
Scaled_Y_377: -1.01 g
Scaled_Z_377: -0.53 g
X_337: 361.00
Y_337: 339.00
Z_337: 421.00
Scaled_X_337: -0.88 g
Scaled_Y_337: -1.01 g
Scaled_Z_337: -0.53 g
Z up
X_377: 361.00
Y_377: 338.00
Z_377: 421.00
Scaled_X_377: -0.88 g
Scaled_Y_377: -1.02 g
Scaled_Z_377: -0.53 g
X_337: 361.00
Y_337: 338.00
Z_337: 421.00
Scaled_X_337: -0.88 g
Scaled_Y_337: -1.02 g
Scaled_Z_337: -0.53 g
Z down
X_377: 339.00
Y_377: 342.00
Z_377: 282.00
Scaled_X_377: -1.01 g
Scaled_Y_377: -0.99 g
Scaled_Z_377: -1.35 g
X_337: 339.00
Y_337: 342.00
Z_337: 282.00
Scaled_X_337: -1.01 g
Scaled_Y_337: -0.99 g
Scaled_Z_337: -1.35 gI am not sure, if it is correct (?????????). I would expect the Acceleration in the Z direction to be nearly 1g. However it is showing in the Y direction net accelration is nearly 1g. If the sensors are damaged or should i manupulate the analog pins in the X,Y,Z directions??
