I2C - Combining bytes into another variable - Trying to use union but failing

Projects Programming
9

Hello AWOL

Apologies for the spoon-fed session but I'm just not getting any joy. I've referenced the union as you've stated:

    union Distance
    {
      long Distance;
      byte Received_Byte_Array[4];
    } Distance;

Then I tried to compile but I'm still getting the issue of Received_Byte_Array not declared. I then looked at the post from the first link again and tried to accomplish it as PaulS said in that post:

stuff sensorData;
sensorData.bytes[0] = firstValue;
sensorData.bytes[1] = secondValue;
sensorData.bytes[2] = thirdValue;
sensorData.bytes[3] = fourthValue;

My version being:

        if (Wire.available())    // slave may send less than requested
        {
            Distance; 
            Received_Byte_Array[0] = Wire.read();
            Received_Byte_Array[1] = Wire.read();
            Received_Byte_Array[2] = Wire.read();
            Received_Byte_Array[3] = Wire.read();                        
        }

I also tried:

            for ( int i = 0; i < 4; i++)
            {
              Distance Received_Byte_Array[i] = Wire.read();
            }

as well as:

            for ( int i = 0; i < 4; i++)
            {
              Distance; Received_Byte_Array[i] = Wire.read();
            }

Still nothing, apologies if I'm being a nuisance but I'm not finding any examples of this.