在Arduino上将整数/小数转换为十六进制？

Question

How can an integer or decimal variable be converted into a hex string? I can do the opposite (convert hex to int) but I can't figure out the other way.

This is for Serial.print() hex values in an array.

Answer 1

Take a look at the Arduino String tutorial here . The code below was taken from that example.

// using an int and a base (hexadecimal):
stringOne =  String(45, HEX);   
// prints "2d", which is the hexadecimal version of decimal 45:
Serial.println(stringOne);  

There are plenty of other examples on that page, though I think for floating point numbers you'll have to roll your own.

Answer 2

有一个简单的解决方案，只需使用：

Serial.print(yourVariable, HEX);

Answer 3

The Streaming library provides a built in way to do this:

#include <Streaming.h>
...
Serial << "45 in hex is " << _HEX(45) << endl;

You will need to download the Library from http://arduiniana.org/libraries/streaming/ and place it in a subdirectory of your Sketchbook folder. The Menu File-Preferences will show you where that is.

This library can also be used when outputting to LCDs.