How to convert string to ECS/P Hex

Question

I'm using jquery / javascript to print raw data to a network label printer. In order to do that the strings will need to be converted to hexadecimal. with a \\x preceding each character.

SO if I wanted to print a label with " I love stackoverflow " the string would need to be converted to \\x49\\x20\\x6C\\x6F\\x76\\x65\\x20\\x73\\x74\\x61\\x63\\x6B\\x6F\\x76\\x65\\x72\\x66\\x6C\\x6F\\x77 .

I have searched around and I can't find anything on this. Any ideas on how this can be achieved?

I could create a library of variables for each character var A = '/x41; and then run the string through a 'checker' that goes through the entire sting, but I feel like I am missing a simpler solution.

Answer 1

You can simply do it this way:

• [...str]: convert the string to an array of chars
• .map(): apply a function on each char
• convert a char to integer --> to hex number
• join the array: get the hex string

 function stringtohex(str) { return [...str].map(e => '\\\\x' + Number(e.charCodeAt(0)).toString(16)).join('') } var convertedstr = stringtohex( "I love stackoverflow"); console.log(convertedstr);