public double getPowerConsumption() throws Exception
    {
    	 DatagramPacket packet = sendCmdPkt(new CmdPayload() {

             @Override
             public byte getCommand() {
                 return 0x6a;
             }

             @Override
             public Payload getPayload()
             {
                 return new Payload()
                 {

                     @Override
                     public byte[] getData()
                     {
                    	 byte[] packet = {8, 0, -2, 1, 5, 1, 0, 0, 0, 45};
                    	 return packet;
                     }

                 };
             }

         });

         byte[] data = packet.getData();

         log.debug("SP2 get consumption received encrypted bytes: " + DatatypeConverter.printHexBinary(data));

         int err = data[0x22] | (data[0x23] << 8);

         if (err != 0)
         {
             log.warn("SP2 get consumption received returned err: " + Integer.toHexString(err) + " / " + err);
             throw new Exception("Could not get power consumption");
         }
         else
         {
        	 byte[] payload = decryptFromDeviceMessage(data);
        	 double energy = 0.0;
			 energy = Double.parseDouble(Integer.toHexString((payload[0x07]&0xFF)*256+(payload[0x06]&0xFF))+(Integer.parseInt(Integer.toHexString(payload[0x05]&0xFF))/100.0d+"").substring(1));
			 return energy;
         }
    }