I need two hserin/out connections to a 20X2. They will be used sequentially i.e. communicate with one device, do stuff, communicate with second device, do other stuff, start over. I'm stuck with 9600 baud and the manual implies that serin would be unreliable at that speed. Does anyone have a multiplex scheme they have used? I can think of several solutions but being lazy today I wondered if someone had blazed this trail.