binary_string_from_hex_to_hex.lua

val = "a0192faa0"

function string.pack(str)
    local packed_string = ""    for i=1, #str, 2 do
        local hex_number = tonumber("0x" .. str:sub(i,i) .. str:sub(i+1,i+1))
        packed_string = packed_string .. string.char(hex_number)
    end    return packed_string
end

print("==========")
print(val)
print("==========")
binary_string = string.pack(val)
print(binary_string, type(binary_string), #binary_string)
print("==========")

for i=1, #binary_string do
  print(string.byte(binary_string, i), string.format("%x", string.byte(binary_string, i)))
end
print("==========")