@jorge-gonzalez said in Script to convert from Hex to Dec:
13:32
@Jorge-Gonzalez, documentation to solve your problems.
Firstly see what parseInt does - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt
There you can see that the hexdecimal value has to be in correct format be it with 0x or without. Your string splits 2 bytes in the hexdecimal format by using a colon. You need to remove it. Simply do it by utilizing .replace method on a string before putting it into parseInt. Or if you have a string which contains multiple values utilize .split method on a string and then put the bytes together before putting the value into parseInt.
Replace method explanation
https://www.w3schools.com/jsref/jsref_replace.asp
Split method explanation
https://www.w3schools.com/jsref/jsref_split.asp
Following function is following the detailed explanation you provided in the post.
function stringsplitter (string) {
var result = {};
// This contains the bytes of data
result.arrayofbytes = string.split(':');
// Get byte count of data inside the string
result.bytecount = result.arrayofbytes.length;
// Start at the beginning
var variablecounter = 0;
result.hexdata = [];
result.decimaldata = [];
// Loop over the array, but taking into account that we have 2 byte data, use try/catch so that function will return if something should fail
try{
for (var x = 0;x < result.bytecount / 2;x++){
result.hexdata[x] = result.arrayofbytes[variablecounter] + result.arrayofbytes[variablecounter+1];
result.decimaldata[x] = parseInt(result.hexdata[x],16);
variablecounter += 2;
}
}catch(err){
return err
}
// return object with all our data which includes hexdecimal data, decimaldata and byte count inside the string
return result;
}
// Example usage
var devicestring = '13:30:27:14:01:33:02:6c:02:76';
var data = stringsplitter(devicestring);
//get array in hexdecimal and decimal format
var hexdata = data.hexdata;
var decimaldata = data.decimaldata;
// first value in hexdecimal and decimal format
var firstvaluehex = hexdata[0];
var firstvaluedecimal = decimaldata[0];
// Second value in hexdecimal and decimal format
var secondvaluehex = hexdata[1];
var secondvaluedecimal = decimaldata[1];
// Following that your post had used an example with the last value
var lastvalue = decimaldata[4];
// Should be 23
var lastvaluecorrected = lastvalue * 0.1 - 40;
Thomas
