Hello Jcee,

Jcee>>Thanks Dwayne, I understand that you can't send in two directions at once on the same pin. But I want to communicate one way on one pin and the other way on another pin. Is that possible?<<

It certainly is, as long as it is not at the "exact" same time.

In other words, there should be a "trigger" byte to tell the other chip to send or receive. That trigger byte can be on the "transmit pin", or be part of the receive pin. (Depending on how you want it.)
thus it will talk back and forth just like a walkie talkie. (not like a cell phone).

Serin2 has a timeout value thus both chips can be in a loop.

tell us how you want it to work, maybe we can puts some code out there for you...

Dwayne