Prints data to the serial port.
data: all integer types, including char
This command can take many forms:
Serial.print(b) with no format specified, prints b as a decimal number in an ASCII string. For example,
int b = 79; Serial.print(b);
prints the ASCII string "79".
Serial.print(b, DEC) prints b as a decimal number in an ASCII string. For example,
int b = 79; Serial.print(b, DEC);
prints the string "79".
Serial.print(b, HEX) prints b as a hexadecimal number in an ASCII string. For example,
int b = 79; Serial.print(b, HEX);
prints the string "4F".
Serial.print(b, OCT) prints b as an octal number in an ASCII string. For example,
int b = 79; Serial.print(b, OCT);
prints the string "117".
Serial.print(b, BIN) prints b as a binary number in an ASCII string. For example,
int b = 79; Serial.print(b, BIN);
prints the string "1001111".
Serial.print(b, BYTE) prints b as a single byte. For example,
int b = 79; Serial.print(b, BYTE);
returns the string "O", which is the ASCII character represented by the value 79. For more information see the ASCII table.
Serial.print(str) if str is a string or an array of chars, prints str as an ASCII string. For example,
Serial.print("Hello World!");
prints the string "Hello World!".
b: the byte to print, or
str: the string to print
None
/* Analog input reads an analog input on analog in 0, prints the value out. created 24 March 2006 by Tom Igoe */ int analogValue = 0; // variable to hold the analog value void setup() { // open the serial port at 9600 bps: Serial.begin(9600); } void loop() { // read the analog input on pin 0: analogValue = analogRead(0); // print it out in many formats: Serial.print(analogValue); // print as an ASCII-encoded decimal Serial.print("\t"); // print a tab character Serial.print(analogValue, DEC); // print as an ASCII-encoded decimal Serial.print("\t"); // print a tab character Serial.print(analogValue, HEX); // print as an ASCII-encoded hexadecimal Serial.print("\t"); // print a tab character Serial.print(analogValue, OCT); // print as an ASCII-encoded octal Serial.print("\t"); // print a tab character Serial.print(analogValue, BIN); // print as an ASCII-encoded binary Serial.print("\t"); // print a tab character Serial.print(analogValue/4, BYTE); // print as a raw byte value (divide the // value by 4 because analogRead() returns numbers // from 0 to 1023, but a byte can only hold values // up to 255) Serial.print("\t"); // print a tab character Serial.println(); // print a linefeed character // delay 10 milliseconds before the next reading: delay(10); }
Serial.print() doesn't work on floats, so you'll need to cast them to an integral type, losing any fractional values. It is sometimes useful to multiply your float by a power of ten, to preserve some of this fractional resolution.
Be careful about doing math inside the brackets e.g.Serial.print(x-2, DEC);
The unsigned char data type, and byte data type will yield incorrect results and act as though they are signed types i.e. type char.
The Serial.Print function puts data into a buffer. It will wait for one character to send, before going on to the next character. However the function returns before sending the last character.