My Arduino Nano clone doesn't show in the serial this simple code. Why?

Question

Here is the code:

void setup() {
 Serial.print("hi");
}
void loop() {
}

The product is in here.

I also installed the drivers.

Answer 1

You haven't "started" the serial interface. Before you use the serial you need to tell it to initialize the hardware and how fast you want to communicate.

You need to add, for instance,

Serial.begin(9600);

to your setup() function before you do your Serial.print().

• Gabriele Giordano: What does the command do exactly? Why 9600?
• Gabriele Giordano: Still can't see nothing in the serial
• Majenko: It makes it work. At the moment you have sat in your car and and are pressing the accelerator - but you forgot to start the engine. You need to make sure that you are communicating at the same speed as you have specified in the begin() function call. Also you may see more if you change your print to a println and place it in loop instead of setup so it sends it over and over again.
• Gabriele Giordano: still nothing in the serial monitor
• Majenko: Are you sure you are programming the board? Try using the Blink example to make sure you are actually programming it. Then try the AnalogInOutSerial example.