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ASCII Table

Demonstrates the advanced serial printing functions by generating a table of characters and their ASCII values in decimal, hexadecimal, octal, and binary. For more on ASCII, see asciitable.com

Hardware Required

• Arduino Board

Circuit

image developed using Fritzing. For more circuit examples, see the Fritzing project page

None, but the Arduino has to be connected to the computer.

Code

/* ASCII table Prints out byte values in all possible formats: * as raw binary values * as ASCII-encoded decimal, hex, octal, and binary values For more on ASCII, see http://www.asciitable.com and http://en.wikipedia.org/wiki/ASCII The circuit: No external hardware needed. created 2006 by Nicholas Zambetti modified 30 Aug 2011 by Tom Igoe This example code is in the public domain. <http://www.zambetti.com> */ void setup() { Serial.begin(9600); // prints title with ending line break Serial.println("ASCII Table ~ Character Map"); } // first visible ASCIIcharacter '!' is number 33: int thisByte = 33; // you can also write ASCII characters in single quotes. // for example. '!' is the same as 33, so you could also use this: //int thisByte = '!'; void loop() { // prints value unaltered, i.e. the raw binary version of the // byte. The serial monitor interprets all bytes as // ASCII, so 33, the first number, will show up as '!' Serial.write(thisByte); Serial.print(", dec: "); // prints value as string as an ASCII-encoded decimal (base 10). // Decimal is the default format for Serial.print() and Serial.println(), // so no modifier is needed: Serial.print(thisByte); // But you can declare the modifier for decimal if you want to. //this also works if you uncomment it: // Serial.print(thisByte, DEC); Serial.print(", hex: "); // prints value as string in hexadecimal (base 16): Serial.print(thisByte, HEX); Serial.print(", oct: "); // prints value as string in octal (base 8); Serial.print(thisByte, OCT); Serial.print(", bin: "); // prints value as string in binary (base 2) // also prints ending line break: Serial.println(thisByte, BIN); // if printed last visible character '~' or 126, stop: if(thisByte == 126) { // you could also use if (thisByte == '~') { // This loop loops forever and does nothing while(true) { continue; } } // go on to the next character thisByte++; } [Get Code]

Output

ASCII Table ~ Character Map !, dec: 33, hex: 21, oct: 41, bin 4, decúASCII Table ~ Character Map !, dec: 33, hex: 21, oct: 41, bin: 100001 ", dec: 34, hex: 22, oct: 42, bin: 100010 #, dec: 35, hex: 23, oct: 43, bin: 100011 $, dec: 36, hex: 24, oct: 44, bin: 100100 %, dec: 37, hex: 25, oct: 45, bin: 100101 &, dec: 38, hex: 26, oct: 46, bin: 100110 ', dec: 39, hex: 27, oct: 47, bin: 100111 (, dec: 40, hex: 28, oct: 50, bin: 101000 ), dec: 41, hex: 29, oct: 51, bin: 101001 *, dec: 42, hex: 2A, oct: 52, bin: 101010 +, dec: 43, hex: 2B, oct: 53, bin: 101011 ,, dec: 44, hex: 2C, oct: 54, bin: 101100 -, dec: 45, hex: 2D, oct: 55, bin: 101101 ., dec: 46, hex: 2E, oct: 56, bin: 101110 /, dec: 47, hex: 2F, oct: 57, bin: 101111 0, dec: 48, hex: 30, oct: 60, bin: 110000 1, dec: 49, hex: 31, oct: 61, bin: 110001 2, dec: 50, hex: 32, oct: 62, bin: 110010 3, dec: 51, hex: 33, oct: 63, bin: 110011 4, dec: 52, hex: 34, oct: 64, bin: 110100 5, dec: 53, hex: 35, oct: 65, bin: 110101 6, dec: 54, hex: 36, oct: 66, bin: 110110 7, dec: 55, hex: 37, oct: 67, bin: 110111 8, dec: 56, hex: 38, oct: 70, bin: 111000 9, dec: 57, hex: 39, oct: 71, bin: 111001 :, dec: 58, hex: 3A, oct: 72, bin: 111010 ;, dec: 59, hex: 3B, oct: 73, bin: 111011 <, dec: 60, hex: 3C, oct: 74, bin: 111100 =, dec: 61, hex: 3D, oct: 75, bin: 111101 >, dec: 62, hex: 3E, oct: 76, bin: 111110 ?, dec: 63, hex: 3F, oct: 77, bin: 111111 @, dec: 64, hex: 40, oct: 100, bin: 1000000 A, dec: 65, hex: 41, oct: 101, bin: 1000001 B, dec: 66, hex: 42, oct: 102, bin: 1000010 C, dec: 67, hex: 43, oct: 103, bin: 1000011 D, dec: 68, hex: 44, oct: 104, bin: 1000100 E, dec: 69, hex: 45, oct: 105, bin: 1000101 ...

See Also:

• increment, ++
• while()
• serial()
• Serial Call and Response ASCII - sending multiple vairables using a call-and-response (handshaking) method, and ASCII-encoding the values before sending.