(RESOLVED) Serial commands from Uno using DB9 shield to DB25

Projects Discussion and Showcase Device Hacking
20

be80be:
First off I know how a max232 works the problem here is the datasheet for the shield being used doe not state its a max 232 it
said it only does 5 volts

Now and shield with a real max232 will brag about it and state it is fully able serial port.

I bet the posters is not giving the needed voltage levels.

One of the picture shows an overhead view with an IC showing the MAX3232 identification. So the it will produce 8+- volts.

Paul