Yes, sorry, Arduino Mega 2560. The Arduino receives the serial communication because it starts the measuring process, however, I don't receive any output via software. The LCD screen is updated after the serial output from the Arduino showing the last output. I have no been able to tell if it's the Arduino, or the drivers in the process. However, monitoring the COM port reveals no output even being seen from the Arduino.
Basically the flow is:
Arduino power up, measures distances to calibrate.
Shipping software --> Serial "D" --> Arduino sees "D", staggers the sensor activations and calculates any offsets from the calibration readings --> Serial {concatenation string of sensor offsets} --> Updates LCD with same string --> Shipping software monitors COM port, parses manipulates data.
When I experience an issue, the Arduino seems to get the "D" input, measures the box, updates the LCD screen, but I get no COM port output.