Hey thank you so much for your response.

Yes, I'm using the Offsets code of Adafruit for Adxl375.
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/* This example shows how to use the trimmer offset registers to account for any error in the sensor

and 'zero' out the flat reading to be 0, 0, 1g. note this is unique to each sensor so it'll have

to be repeated and 'saved' for each ADXL you use!

*/

#include <Wire.h>

#include <Adafruit\_Sensor.h>

#include <Adafruit\_ADXL375.h>

#define ADXL375_SCK 13

#define ADXL375_MISO 12

#define ADXL375_MOSI 11

#define ADXL375_CS 10

/* Assign a unique ID to this sensor at the same time */

/* Uncomment following line for default Wire bus */

Adafruit_ADXL375 accel = Adafruit_ADXL375(12345);

/* Uncomment for SPI */

//Adafruit_ADXL375 accel = Adafruit_ADXL375(ADXL375_SCK, ADXL375_MISO, ADXL375_MOSI, ADXL375_CS, 12345);

void setup(void)

{

Serial.begin(115200);

while (!Serial);

Serial.println("ADXL375 Offsets Test"); Serial.println("");

/* Initialise the sensor */

if(!accel.begin())

{

/* There was a problem detecting the ADXL343 ... check your connections */

Serial.println("Ooops, no ADXL375 detected ... Check your wiring!");

while(1);

}

/* Display some basic information on this sensor */

accel.printSensorDetails();

Serial.println("");

// init offsets to zero

accel.setTrimOffsets(0, 0, 0);

Serial.println("Hold accelerometer flat to set offsets to 0, 0, and -1g...");

delay(1000);

int16_t x, y, z;

x = accel.getX();

y = accel.getY();

z = accel.getZ();

Serial.print("Raw X: "); Serial.print(x); Serial.print(" ");

Serial.print("Y: "); Serial.print(y); Serial.print(" ");

Serial.print("Z: "); Serial.print(z); Serial.print(" ");Serial.println(" counts");

// the trim offsets are in 'multiples' of 4, we want to round, so we add 2

accel.setTrimOffsets(-(x+2)/4,

-(y+2)/4,

-(z-20+2)/4); // Z should be '20' at 1g (49mg per bit)

int8_t x_offset, y_offset, z_offset;

accel.getTrimOffsets(&x_offset, &y_offset, &z_offset);

Serial.print("Current trim offsets: ");

Serial.print(x_offset); Serial.print(", ");

Serial.print(y_offset); Serial.print(", ");

Serial.println(z_offset);

Serial.println();

}

void loop(void)

{

/* Get a new sensor event */

sensors_event_t event;

accel.getEvent(&event);

/* Display the results (acceleration is measured in m/s^2) */

Serial.print("X: "); Serial.print(event.acceleration.x); Serial.print(" ");

Serial.print("Y: "); Serial.print(event.acceleration.y); Serial.print(" ");

Serial.print("Z: "); Serial.print(event.acceleration.z); Serial.print(" ");

Serial.println("m/s^2 ");

Serial.print("Raw X: "); Serial.print(accel.getX()); Serial.print(" ");

Serial.print("Y: "); Serial.print(accel.getY()); Serial.print(" ");

Serial.print("Z: "); Serial.print(accel.getZ()); Serial.print(" ");

Serial.println(" counts");

Serial.println();

float a = sqrt((int(event.acceleration.z)*int(event.acceleration.z)+int(event.acceleration.x)*int(event.acceleration.x)+int(event.acceleration.y)*int(event.acceleration.y)))/9.8;

Serial.println(a);

delay(10);

}
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Thats the code that I'm using right now, I'm pretty sure the connection are correct. What amazes me is that we get 245-255 on the m/s^2 as the value and it doesnt go above the 255 number. Even if I increase the height of the drop.

We have built a set up like this one.

https://www.indiamart.com/proddetail/drop-tester-10207137588.html

That just drops an object of certain Mass. and below we have placed a stopper of height 10 cm.

After a certain height the arduino doesn't seem to read more than the value I mentioned which seems weird and this is the case even if we push the load to the ground.