i need to calc checksum like this site
https://www.scadacore.com/tools/programming-calculators/online-checksum-calculator/
for hex 313233343536373839 the site calc DD
with my function i get 168, how exactly to do it?
function calculateChecksum8Modulo256(data) {
let checksum = 0;
for (let i = 0; i < data.length; i++) {
checksum = (checksum + data.charCodeAt(i)) % 256;
}
return checksum;
}
let res = calculateChecksum8Modulo256('313233343536373839')