I got a new dishwasher (G 6895) with Wi-Fi integrated and at the same time received a new firmware update the my XGW 3000 gateway. So I now have three ZigBee appliances (XKM 3000 Z) and one Wi-Fi applicance (EK039W). I was curious to see how this integration with the existing system would work.

Homebus 1.0
Integrated nicely – the devices shows up with id=hdm%3ALAN%3AUID%230 instead of id=hdm%3AZigBee%3AZigBee address%23210. However, when programmed, the gateway will return HTTP code 500, i.e. internal server error:

500 No message

Homebus 2.0 (Rest API)
The device is not included in http://GATEWAY/Rest/Devices/. However, when accessing http://GATEWAY/Rest/Devices/UID/ directly, JSON is returned with relevant ident/state information. Including water/power consumption in ExtendedState:

000702040F0000000000000080000000020026030001041B
                              ^^^^^^^^ 0.2 kWh/3.8 L (0x26/10)

I have not figured out how to interact directly with the dishwasher, and would also prefer not to, since this would complicate matters. However, it’s a shame that the Rest implementation is partly broken. For now I’ve hardcoded the new UID in the app I’m working on (as well as my water/power monitoring system running on my Linux server), but I’ll probably end up having to combine the two protocols in order to do what I need. I’ll probably do this anyway, since I also haven’t figured out how to perform actions using the Rest protocol.

Another thing that is broken when accessing the gateway through the Rest protocol is the ElapsedTime value, which is always:

"ElapsedTime":[0,0]

Actually, I think the value is dependent on the current value when booting the gateway. At one point it was always [1,14] until the next reboot, and this was quite possibly the first value it saw when first booting up.

So the value cannot be used at all, e.g. for creating a progress bar. Too bad, since this is one of the advantages of using the Rest protocol over the old XML protocol.

Protocol values

Values found so far:

	static final int PHASE_PRE_WASH    =  2;
	static final int PHASE_MAIN_WASH   =  3;
	static final int PHASE_RINSES      =  4;
	static final int PHASE_FINAL_RINSE =  6;
	static final int PHASE_DRYING      =  7;

	static final int PROGRAM_ECONOMIC         = 28;
	static final int PROGRAM_QUICK_POWER_WASH = 38;

Mapping to Homebus 2.0 phases:

@Override
boolean setProgramPhase(int programPhase) {
	super.setProgramPhase(programPhase);

	switch (programPhase) {
		case 1792:
			// Purpose unknown, observed when programmed (without phase) and off.
			return setPhase(PHASE_UNKNOWN);
		case 1794:
			return setPhase(PHASE_PRE_WASH);
		case 1795:
			return setPhase(PHASE_MAIN_WASH);
		case 1796:
			return setPhase(PHASE_RINSES);
		case 1798:
			return setPhase(PHASE_FINAL_RINSE);
		case 1799:
			return setPhase(PHASE_DRYING);
		default:
			setPhase(PHASE_UNKNOWN);
			return false;
	}
}