code: def read_unsigned_byte(self, cmd):
          
          result = self.bus.read_byte_data(self.address, cmd)
          self.log.debug(
              "read_unsigned_byte: Read 0x%02X from command register 0x%02X" % (
                  result, cmd
              )
          )
          return result
docs: Read an unsigned byte from the specified command register