Hello everyone, sorry for reviving an old thread, but I'm now trying my hand at a small program using Excel VBA to throw switches. I think I understand the basic concepts, but have yet to get anything to really work.
My code does send something through the com port as I see the red and green lights flash on the SER when I try. But, nothing happens to the engine. I'm trying a simple fire rear coupler command.
So, I think what I am sending is most likely incorrect. I've got a couple of questions if anyone could please help me out:
1 - Do you send the 3 bytes as binary or as hex? Seems like binary as the port settings call for 8 data bits.
2 - Do you add a single bit ("1") to the end as the stop bit? I don't think so, but figured I'd ask.
3 - Can you just send this as a string to the com port, or does it have to be in some other variable type (such as byte)?
4 - If it's byte type, then do I declare it with a size of 24? Or 3?
I could post my code if anyone would be willing to give it a look.
Thanks for any help!
