Hi everyone, I am intending to parse an excel file in my pc and send the data to my arduino. As a beginning I'm trying to send one character "1" and when Arduino receives "1" it turns on the led 13. My problem for now is that my java program sends the data to arduino and I can see the RX TX leds …

Send data to arduino from PC in java over Serial (RXTXlib)

system May 2, 2014, 5:30pm 15

    if (r == 49){

How do you know what to send to get a 49?

    if (r == '1'){

How do You know what to send to get a '1'?

Which is easier to know?

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