Waveshare 10 DOF (C) IMU sensor outputs are inconsistent

Question

I got this Waveshare 10 DOF IMU Sensor (C) from my workplace to use in a project but the demo code given in their site. After I uploaded the code to the Arduino UNO I have, the serial monitor outputs are not consistent and changing wildly even though the sensor is just laying on my table without anything moving.

Some values like acceleration and gyroscope aren't readable at all while the altitude and pressure values don't even make sense. I checked the calibration steps but since I don't have an STM32 Development Board I don't know how to follow them either. Does anyone give me advice on how to proceed from this point? Does my sensor faulty since I don't know how old it is or there is something wrong with the provided demo code? This is the demo code:

#include "Waveshare_10Dof-D.h"
bool gbSenserConnectState = false;

void setup() {
  // put your setup code here, to run once:
  bool bRet;
  IMU_EN_SENSOR_TYPE enMotionSensorType, enPressureType;
  Serial.begin(115200);

  imuInit(&enMotionSensorType, &enPressureType);
  if(IMU_EN_SENSOR_TYPE_ICM20948 == enMotionSensorType)
  {
    Serial.println("Motion sersor is ICM-20948");
  }
  else
  {
    Serial.println("Motion sersor NULL");
  }
  if(IMU_EN_SENSOR_TYPE_BMP280 == enPressureType)
  {
    Serial.println("Pressure sersor is BMP280");
  }
  else
  {
    Serial.println("Pressure sersor NULL");
  }
  delay(1000);
}

void loop() {
  // put your main code here, to run repeatedly:
  IMU_ST_ANGLES_DATA stAngles;
  IMU_ST_SENSOR_DATA stGyroRawData;
  IMU_ST_SENSOR_DATA stAccelRawData;
  IMU_ST_SENSOR_DATA stMagnRawData;
  int32_t s32PressureVal = 0, s32TemperatureVal = 0, s32AltitudeVal = 0;
  
  imuDataGet( &stAngles, &stGyroRawData, &stAccelRawData, &stMagnRawData);
  pressSensorDataGet(&s32TemperatureVal, &s32PressureVal, &s32AltitudeVal);

  Serial.println();
  Serial.println("/-------------------------------------------------------------/");
  Serial.print("Roll : "); Serial.print(stAngles.fRoll);
  Serial.print("    Pitch : "); Serial.print(stAngles.fPitch);
  Serial.print("    Yaw : "); Serial.print(stAngles.fYaw);
  Serial.println();
  Serial.print("Acceleration: X : "); Serial.print(stAccelRawData.s16X);
  Serial.print("    Acceleration: Y : "); Serial.print(stAccelRawData.s16Y);
  Serial.print("    Acceleration: Z : "); Serial.print(stAccelRawData.s16Z);
  Serial.println();
  Serial.print("Gyroscope: X : "); Serial.print(stGyroRawData.s16X);
  Serial.print("       Gyroscope: Y : "); Serial.print(stGyroRawData.s16Y);
  Serial.print("       Gyroscope: Z : "); Serial.print(stGyroRawData.s16Z);
  Serial.println();
  Serial.print("Magnetic: X : "); Serial.print(stMagnRawData.s16X);
  Serial.print("      Magnetic: Y : "); Serial.print(stMagnRawData.s16Y);
  Serial.print("      Magnetic: Z : "); Serial.print(stMagnRawData.s16Z);
  Serial.println();
  Serial.print("Pressure : "); Serial.print((float)s32PressureVal / 100);
  Serial.print("     Altitude : "); Serial.print((float)s32AltitudeVal / 100);
  Serial.println();  
  Serial.print("Temperature : "); Serial.print((float)s32TemperatureVal / 100);
  Serial.println();  
  delay(100);
}

There is also another thing at the start of the serial communication where it says that "Motion sersor NULL":

Answer 1

You already have answer in your question. You`re using "Waveshare 10 DOF IMU Sensor (C)" but given example relates to another one - "D version". It uses another motion chip ICM20948 instead of MPU9255. Your setup output corresponds to this, while pressure sensor is the same so it should work correctly.

For your module developers only provide demo code for STM32, not arduino.