SPI Errata:

1.  First byte of the command received is lost. 
    To work-around the command must be prepend with a byte (0x0A ie. \n) prior to sending to the module.
    Ex 1.   Odd number of bytes in command
            Command:    I?\r
            Prepend:    \nI?\r
            Pad?:       \nI?\r
            Byte Swap:  I\n\r?
    
    Ex 2.   Even number of bytes in command
            Command:    S3=3\r123
            Prepend:    \nS3=3\r123
            Pad?:       \nS3=3\r123\n
            Byte Swap:  S\n=3\r321\n3