Can tx and rx pins on the uno be used like regular digital pins?

Question

The uno has digital pins marked 0-13.

0 is marked as rx and 1 is marked as tx. Can these two pins be used as regular digital pins if i am short of digital pins?

jfpoilpret · Accepted Answer · 2014-08-13T20:43:47.370

11

Yes you can perfectly use these 2 pins as long as your program does not use Serial.

EDIT: Serial data over USB goes through copper traces connected to the rx and tx pins, connecting them to the USB to serial converter chip.

edited Aug 13 '14 at 20:43

answered Aug 13 '14 at 20:20

jfpoilpret

score 3 · Answer 2 · answered Aug 21 '14 at 14:49

3

Also you will probably want to ensure these wires are not connected when programming the Arduino. Otherwise you may have problems.

answered Aug 21 '14 at 14:49

sdcharle

score -1 · Answer 3 · answered May 14 '18 at 01:28

-1

You can, but it will disable the serial port.

answered May 14 '18 at 01:28

BobTheAverage

3 Answers3