def transmit(self, cmd_arr, mac):
        ipadr = self.ip_from_mac(mac)
        data = self.baseudp(destmac=mac, ctype=self.CTYPE_TRANSMIT_REQUEST)
        for cmd, pdata in cmd_arr.items():
                data += self.addudp(cmd, pdata)
        data += self.addudp(self.CMD_END)
        self.send(ipadr, self.SENDPORT, data)
        time.sleep(0.7)
        self.recv()

# Der Funktion einen cmd_arr Hash übergeben:

 cmd_arr={
  CMD_PASSWORD:"old_password",
  CMD_NEW_PASSWORD:"new_password"
  }