Read a single byte from static memory area (blocks 0-14).

def read_byte(self, addr):
        """Read a single byte from static memory area (blocks 0-14).
        """
        if addr < 0 or addr > 127:
            raise ValueError("invalid byte address")
        log.debug("read byte at address {0} ({0:02X}h)".format(addr))
        cmd = "\x01" + chr(addr) + "\x00" + self.uid
        return self.transceive(cmd)[-1]