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Topic: communicate between a desktop XP and a arduino uno (Read 881 times) previous topic - next topic


Using a usb connection from my desktop XP compter to my arduino uno, can I communicate back and forth.  For example, using a progaram in C# in my computer, I would like to tell my arunio when to turn on and off digital pin 5.  nickynichols 


Yes you can.
I have not programmed the PC side, only sent info from keboard thru the USB.
Arduino side is very straightforward to receive serial input and act on it.

basics are:
check if data came in with
if (Serial.available() >0){

then read it into a variable to act in
incomingbyte = Serial.read();

then act on it
    if (incomingbyte == value_you_want){
    //act on it
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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