Returning an array from a function

[webghost]

Hi, I am trying to receive data from an IMU sensor and I want it in a form of an array

void  MPU(int i,float* data[7] )
{
 tcaselect(i);
 Serial.print("MPU0: ");
 Wire.beginTransmission(MPU_addr[i]);
 Wire.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
 Wire.endTransmission(false);
 Wire.requestFrom(MPU_addr[i],14,true);  
 AcX=Wire.read()<<8|Wire.read();  // Example value 100
 AcY=Wire.read()<<8|Wire.read();  // Example value 200
 AcZ=Wire.read()<<8|Wire.read();  // Example value 300
 Tmp=Wire.read()<<8|Wire.read();  // Example value 400
 GyX=Wire.read()<<8|Wire.read();  // Example value 500
 GyY=Wire.read()<<8|Wire.read();  // Example value 600
 GyZ=Wire.read()<<8|Wire.read();  // Example value 700
 data[7]= {AcX,AcY,AcZ,Tmp,GyX,GyY,GyZ};
  }

void loop(){
  float data[7]
   for (int i = 0; i <= 7; i++) {
    test= MPU(i,data);
    Serial.println("MPU " i": data 2: "  data[2]  "data 3: "data[3]);
  
   }
  }

Result to be like
MPU 1: data 2: 200 data 3: 300

[Koepel]

The MPU-6050 registers are 16-bit signed integers. There is no need to use 'float' for the array.

void MPU( int i,  int pData[])
{
  ...
  pData[0] = Wire.read() << 8;
  pData[0] |= Wire.read();
  ...
}

[6v6gt]

Instead of this :

Serial.println("MPU " i": data 2: "  data[2]  "data 3: "data[3]);

Use either sprintf() or an individual Serial.print() for each item to be printed. sprintf() does not work with floats. Which Arduino are you using?

[gcjr]

a conventional approach for returning a large or variable amount of data from a sub-function is to pass a pointer to an array and its size to the sub-function which fills it in and usually returns the amount of data captured. the calling function then processes array it passed to the sub-function

[webghost]

Thank you everyone for getting back to me, I managed to get my code to work, if you have any suggestions do let me know.
p.s serial print is just there for a short while I will remove it as I won't read serial data anymore, atm I working on Arduino Uno and will eventually move to ESP32.
Here's the rough code for anyone who may want it

int Data[7]={1,2,3,4,5,6,7};
void  MPU( int i, int Data[7] )

{
 tcaselect(i);
 Wire.beginTransmission(MPU_addr[i]);
 Wire.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
 Wire.endTransmission(false);
 Wire.requestFrom(MPU_addr[i],14,true);  // request a total of 14 registers
 Data[1]=Wire.read()<<8|Wire.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)    
 Data[2]=Wire.read()<<8|Wire.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
 Data[3]=Wire.read()<<8|Wire.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
 Data[4]=Wire.read()<<8|Wire.read();  // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
 Data[5]=Wire.read()<<8|Wire.read();  // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
 Data[6]=Wire.read()<<8|Wire.read();  // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
 Data[7]=Wire.read()<<8|Wire.read();  // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)

  }

void loop(){

 
   for (int i = 0; i <= 7; i++) {
    MPU(i,Data);
    Serial.print("MPU: ");
     Serial.print(i);
// Serial.print(" | AcX = "); Serial.print(Data[1]);
// Serial.print(" | AcY = "); Serial.print(Data[2]);
// Serial.print(" | AcZ = "); Serial.print(Data[3]);
 Serial.print(" | Tmp = "); Serial.print(Data[4]/340.00+36.53);  //equation for temperature in degrees C from datasheet
// Serial.print(" | GyX = "); Serial.print(Data[5]);
// Serial.print(" | GyY = "); Serial.print(Data[6]);
// Serial.print(" | GyZ = "); Serial.print(Data[7]);
Serial.println();
   }

[Koepel]

Please always show a full sketch.
There is even a website for it: https://snippets-r-us.com/
Do you really have seven MPU-6050 sensors ?

An array "Data[7]" has 7 elements, from Data[0] to Data[6] (inclusive).

A for-loop for that array is this:

for( int i=0; i<7; i++)
{
  Serial.println( Data[i]);
}