What's an easy way to convert a string into binary?

Thanks!
I found an explanation online and wrote a function to convert numbers into binary.

So to convert a text I used gmatch:

for letter in string.gmatch("Hello", ".") do
	local byte = letter:byte(1, 1)
	
	if got then
		got ..= convert(byte) .. " "
	else
		got = convert(byte)
	end
end

print(got) --> 10010001100101 1101100 1101100 1101111

But what it outputs for “Hello” is apparently wrong.