5

Most programs follow this route: They have a Serial.begin() for the serial connection between PC and Arduino (the serial monitor) and they use SoftwareSerial for a device.

Can you go the other way around? Can you use SoftwareSerial for the communication between PC and Arduino, and Serial for a device?

2

Short answer: no.

Pins 0 and 1 an an Uno are directly wired to the PC communication chip. You could make a board that was wired differently and connected SoftwareSerial to the PC, but you would have to switch it back to pins 0 and 1 when uploading to the arduino somehow.

On an arduino leonardo "Serial" for communicating with PC over USB is different from "Serial1", which is connected to pins 0 and 1 on the board. You can use both simultaneously, so if you really need to use hardware serial and PC comms at the same time, I recommend you buy a leonardo.

  • But of course, you can omit the communication with the pc and have the hardware serial dedicated for communication with a device correct? And use the softwareserial for communicatoin with another device. – user1584421 Jun 26 '14 at 9:48
  • Yes that is correct, If you don't communicate with the PC hardware serial can be used for anything you please, and at the same time as Software Serial. – BrettAM Jun 26 '14 at 17:58
1

Yes you can. If you use a USB FTDI type cable to connect your computer to the SoftwareSerial pins, you can use a terminal emulator program (HyperTerm, putty, etc) to communicate with the Arduino.

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