String val // Data received from the serial port Serial myPort // Create object from Serial class Add these two lines beneath the import statement: language:java All this means is that these variables can used anywhere in our sketch. Magic! Underneath our import statement we need to declare some global variables. You should now see a line like import rial.* at the top of your sketch. Your Arduino sketch should now look something like this: We're setting up serial communication from the Arduino and telling it to send data every 100 milliseconds. That's all we need for the Arduino side of our first example. wait 100 milliseconds so we don't drive ourselves crazy send 'Hello, world!' over the serial port Type the following in your Arduino sketch, below the code we already wrote: language:cpp For our first example, we'll just send the string 'Hello, world!' over the serial port, over and over (and over). This is bad.Īfter our setup() method, we need a method called loop(), which is going to repeat over and over as long as our program is running. For now, all you need to now about baud rate is that (basically) it's the rate at which we're sending data to the computer, and if we're sending and receiving data at different rates, everything goes all gobbledy-gook and one side can't understand the other. Here, we're using it to start serial communication from the Arduino to our computer at a baud rate of 9600. initialize serial communications at a 9600 baud rate Click in the white area and type the following (or copy and paste if you feel lazy): language:cpp The nice big white space is where we are going to write our code.
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