Well, not sure whether it is going to work, but when you take the 32 byte hex code (the post in New Xiaomi aqara camera/gateway for instance there is a token mentioned of “473055577175774b4369774835553044”) and convert that in https://www.rapidtables.com/convert/number/hex-to-ascii.html, i get “G0UWquwKCiwH5U0D”, a code of length 16.