BMX055 9-Axis IMU Sensor – High-Precision SPI/I2C Motion Tracking Module | MPU9250 Alternative

#include <Wire.h>

void setup() {
  Wire.begin();
  Serial.begin(9600);
  Serial.println("\nI2C Scanner");
}

void loop() {
  byte error, address;
  int nDevices = 0;
  
  for(address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    
    if(error == 0) {
      Serial.print("I2C device found at address 0x");
      if(address < 16) Serial.print("0");
      Serial.println(address, HEX);
      nDevices++;
    }
  }
  
  if(nDevices == 0) Serial.println("No I2C devices found");
  delay(5000);
}

/*
  BMX055 Basic Accelerometer Read Example
*/

#include <Wire.h>
#include <BMX055.h>

BMX055 bmx;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  
  // Start the accelerometer with configuration mode 0x3
  bmx.beginAcc(0x3);
  
  Serial.println("BMX055 Accelerometer Ready");
  Serial.println("-----------------------------");
}

void loop() {
  // Read acceleration values (scaled to g-force)
  int xAcc = bmx.getAccelerationX();
  int yAcc = bmx.getAccelerationY();
  int zAcc = bmx.getAccelerationZ();
  
  // For ±2g range, raw value 16384 = 1g; convert to g
  float ax = xAcc / 16384.0;
  float ay = yAcc / 16384.0;
  float az = zAcc / 16384.0;
  
  Serial.print("Accel (g): ");
  Serial.print(ax); Serial.print(", ");
  Serial.print(ay); Serial.print(", ");
  Serial.println(az);
  
  delay(100);
}

/*
  BMX055 Complete 9-Axis Read Example
  Reads accelerometer, gyroscope, and magnetometer data
*/

#include <Wire.h>
#include <BMX055.h>

BMX055 bmx;

void setup() {
  Serial.begin(115200);
  Wire.begin();
  
  // Initialize all sensors
  bmx.begin();
  
  // Optional: Set accelerometer range (default ±2g)
  // bmx.setAccelRange(ACCEL_RANGE_2G);
  
  // Optional: Set gyroscope range (default ±2000°/s)
  // bmx.setGyroRange(GYRO_RANGE_2000);
  
  Serial.println("BMX055 9-Axis Sensor Ready");
  Serial.println("----------------------------------------");
}

void loop() {
  // Read accelerometer (g-force)
  float ax = bmx.getAccelX();
  float ay = bmx.getAccelY();
  float az = bmx.getAccelZ();
  
  // Read gyroscope (degrees per second)
  float gx = bmx.getGyroX();
  float gy = bmx.getGyroY();
  float gz = bmx.getGyroZ();
  
  // Read magnetometer (microtesla)
  float mx = bmx.getMagX();
  float my = bmx.getMagY();
  float mz = bmx.getMagZ();
  
  // Calculate heading (magnetic north) from magnetometer
  float heading = atan2(my, mx) * 180 / PI;
  if (heading < 0) heading += 360;
  
  Serial.print("Accel (g): ");
  Serial.print(ax); Serial.print(", ");
  Serial.print(ay); Serial.print(", ");
  Serial.println(az);
  
  Serial.print("Gyro (°/s): ");
  Serial.print(gx); Serial.print(", ");
  Serial.print(gy); Serial.print(", ");
  Serial.println(gz);
  
  Serial.print("Mag (µT): ");
  Serial.print(mx); Serial.print(", ");
  Serial.print(my); Serial.print(", ");
  Serial.println(mz);
  
  Serial.print("Heading: ");
  Serial.print(heading);
  Serial.println("°");
  
  Serial.println("----------------------------------------");
  
  delay(100);
}

BMX055 bmx(CS_PIN);  // Use SPI mode with specified CS pin
bmx.begin();