This is an simple library for Arduino that makes possible to quickly output numbers in hexadecimal or binary format. Just use functions hex() or bin() to get result. Example.

// Arduino code example demonstrating usage of functions hex and bin.
// ! ~~~ TESTED ON ARDUINO UNO R3 ~~~ !
#include <SoftwareSerial.h>
#include <hex.h>

void setup(){
	Serial.begin(9600); // I took 9600 by default (for example). Change it, if you want another value
	// ..... some code ..... //
	Serial.println("Number 78 in hexadecimal is: 0x" + hex((byte) 78)); // Testing string output of hex function for byte type
	// ..... some more code ..... //
	unsigned int a = random(65536); // Say this set a = 35434
	Serial.println("a in hexadecimal is: 0x" + hex(a)); // Nothing to explain
	Serial.println("a in binary is: 0b" + bin(a)); // Nothing to explain
	// ..... some more code ..... //
}

void loop(){
	// ..... more and more code ..... //
	Serial.println("Binary : hexadecimal values in range [0,645243)"); // Say we want to print values from 0 to 645243 in binary and hexadecimal formats
	for (long i = 0; i<645243; ++i) // Loop for values
		Serial.println("\t0b"+bin(i)+"\t:\t0x"+hex(i)); // Printing string
	// ..... finally code ..... //
}

If we start code, the output will look like this

	// some codes output
	
	Number 78 in hexadecimal is: 0x4E
	
	// some more codes output
	
	a in hexadecimal is: 0x8A6B
	a in binary is: 0b‭1000101001101010
	
	// some more codes output
	// more and more outputs
	
	Binary : hexadecimal values in range [0,645243)
	0b00000000000000000000000000000000:0x00000000
	0b00000000000000000000000000000001:0x00000001
	
	// ..... bla bla bla ..... //
	
	0b‭00000000000010011101100001111010‬:0x000‭9D87A
	
	// finally output

UPDATES OF FILE

In last updates of library file fixed some errors and now it's ready for use. I also added 2 new functions.

char charToByte(const char& by); // Returns the real number from char number. Example charToByte('5') -> 5 or charToByte('a') -> 0xA
void fromString(const String& str,byte* ret) // Converts hexadecimal String of byte to byte. Example fromString("5D") -> 93

If my code isn't working please contact to me to fix any error in that. Email: arsen.gharagyozyn.96@gmail.com