Thanks much for the info. I have only been working with the Uno so far, the Mega I got is still in its original unopened box and I have not looked at the differences between the two. I guess it is time to break it out. I did suspect (knew with the Uno) I was going to have to convert levels, fortunately, I have several MAX232’s laying around in the parts drawers. One thing I was considering looking at was the RS232 Shield, just another excuse to order and play with toys 
T!