Outputs - Getting Started with Intel Galileo - page 54

The syntax of Serial.begin() is:
Serial.begin(speed);
The parameter is:
speed : the speed in bits per second (also known as baud). The following val-
ues are typically used: 300, 600, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 38400, 57600, or 115200. With Arduino sketches, 9600 is most
common.
Serial.begin() does not return a value.
Serial.print()
This function transmits data over the serial port.
The syntax of Serial.print() is:
Serial.print(value);
The parameter is:
value : the data to send. This can be a string of text, a character, a byte, an
integer, or other types of data.
Serial.print() returns the number of bytes transmitted. It's not necessary
to use this return value and you can safely ignore it.
Serial.println()
Just like Serial.print() , Serial.println() sends data over the serial port.
The difference is that it adds a carriage return to the end of the data it sends.
The syntax of Serial.println() is:
Serial.println(value);
The parameter is:
value : the data to send. This can be a string of text, a character, a byte, an
integer, or other types of data.
Serial.println() returns the number of bytes transmitted. It's not neces-
sary to use this return value and you can safely ignore it.
Controlling A/C Appliances with Relays
The small amount of electrical current that comes from the digital pins is not
enough to power much more than a small LED. In order to control the power
to something like a lamp or blender, you'll need to use a relay .