Sensor (ADXL345 3 axis accelerometer) acting different when combined with Teensy 4.0

[woutbog]

Hello, I'm designing a flight computer for my rocket, and I'm testing an accelerometer at the moment. So I followed an online tutorial that used a regular Arduino, but I wanted to log data so I ordered a Teensy because of it's speeds. When I connect it all the same as last time (with the nano), I now get these insane values "corresponding" to millimeters of acceleration. This can't be something good.


Here are some screenshots of results with Teensy 4.0 and the Arduino Nano, also a picture of how I have it wired up. The sensor uses the I2C protocol.

/*
    Arduino and ADXL345 Accelerometer Tutorial
     by Dejan, https://howtomechatronics.com
*/
#include <Wire.h>  // Wire library - used for I2C communication
int ADXL345 = 0x53; // The ADXL345 sensor I2C address
float X_out, Y_out, Z_out;  // Outputs
void setup() {
  Serial.begin(9600); // Initiate serial communication for printing the results on the Serial monitor
  Wire.begin(); // Initiate the Wire library
  // Set ADXL345 in measuring mode
  Wire.beginTransmission(ADXL345); // Start communicating with the device 
  Wire.write(0x2D); // Access/ talk to POWER_CTL Register - 0x2D
  // Enable measurement
  Wire.write(8); // (8dec -> 0000 1000 binary) Bit D3 High for measuring enable 
  Wire.endTransmission();
  delay(10);
}
void loop() {
  // === Read acceleromter data === //
  Wire.beginTransmission(ADXL345);
  Wire.write(0x32); // Start with register 0x32 (ACCEL_XOUT_H)
  Wire.endTransmission(false);
  Wire.requestFrom(ADXL345, 6, true); // Read 6 registers total, each axis value is stored in 2 registers
  X_out = ( Wire.read()| Wire.read() << 8); // X-axis value
  X_out = X_out/256; //For a range of +-2g, we need to divide the raw values by 256, according to the datasheet
  Y_out = ( Wire.read()| Wire.read() << 8); // Y-axis value
  Y_out = Y_out/256;
  Z_out = ( Wire.read()| Wire.read() << 8); // Z-axis value
  Z_out = Z_out/256;
  Serial.print("Xa= ");
  Serial.print(X_out);
  Serial.print("   Ya= ");
  Serial.print(Y_out);
  Serial.print("   Za= ");
  Serial.println(Z_out);
  delay(100);
}

Thanks for reading this and all support is very welcome!

(Sorry about my English if it's bad, I'm not an native Englishman / American)

 

[woutbog]

Just realised, don't mind the 100 delay at the end of the code, was testing if the speed of the Teensy was the issue, but gives same result.