Can TX1-TX3 and RX1-RX3 be used as regular Digital I/O pins on a Mega 2560?

Projects Programming
1

Hi all,

A program running on my Mega 2560 uses Serial.begin(); for communication with a PC on TX0 and RX0.

Does this mean I can use the TX1-2-3 and RX1-2-3 pins as regular digital I/O pins as long as I don't call:

Serial1.begin();   // TX1 and RX1, digital pins 18 & 19
Serial2.begin();   // TX2 and RX2, digital pins 16 & 17
Serial3.begin();   // TX3 and RX3, digital pins 14 & 15

Or are these pins "in use" as well after calling Serial.begin();, preventing them from being used as regular digital I/O?

(I had some strange problems on these digital 14-19 pins and I want to make sure this is not caused by me using Serial.begin(); for TX0/RX0 in any way.)

2

Yes. Serial.begin() has no effect on the Serial1, Serial2 and Serial3 pins, either Rx or Tx

3

Your topic was MOVED to its current forum category as it is more suitable than the original

4

Thank you @UKHeliBob , much appreciated!

5

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