Thanks Shapeshifter. The way I understand it however is that the client.print() function requires the arguement passed to it to be in byte form...thus why i implemented it like that. However, I really want to pass it Hex as the OBD2 expects to receive the PID commands (Parameter ID) to be in Hex based ASCII. So I wasn't even sure if client.print() was the right method to invoke because it was in the form of a byte which i was not sure if the OBD2 controller was able to decode back into Hex (I doubt it can).