Rx and Tx pins

Other Hardware LEDs and Multiplexing
1

Hi:

I ran out of digital Input/Output pins for my project. Can I use pins 0 (Rx) and 1 (Tx) as digital IN/OUT pins like the others (2-13)?

Thanks.

2

Yes, you can use them for data if you don't need them for Serial. You might get a little noise on the RX line because the USB-to-Serial hardware is connected to it through a resistor. Shouldn't be much problem if you are using it as an output but if you use it as an input for a high-impedance source you may get enough interference to cause problems.