Convert UTF-8 Go strings to ASCII bytes.

string_to_ascii.go

package main

import (
	"unicode/utf8"
)

// Fake converting UTF-8 internal string representation to standard
// ASCII bytes for serial connections.
func StringToAsciiBytes(s string) []byte {
	t := make([]byte, utf8.RuneCountInString(s))
	i := 0
	for _, r := range s {
		t[i] = byte(r)
		i++
	}
	return t
}

@nerotiger to convert to string, I think you can do something like this since strings default encoding is UTF-8

package main

import "fmt"

func main() {
        stringToAscii := StringToAsciiBytes("hello")
        fmt.Println(stringToAscii ) // this will print out [104 101 108 108 111]

        // To convert back to string, you can do something like
        asciiBytesToString = string(stringToAscii )
        fmt.Println(asciiBytesToString) // this will print out hello
}

This StringToAsciiBytes func is unfortunately just plain wrong. If you want to get hold of every byte of a Go string (which indeed is UTF-8) s, then you just can just loop like for _, b := range s. Please read up what RuneCountInString does https://pkg.go.dev/unicode/utf8#RuneCountInString

Thanks for the correction, @quite ❤️