PS. On our local hardware e-mail conference, some 2-3 years ago we had a thread where we discussed "home automation". One of the lines was, that you have to chose such a place for your heater/furnace, so that it can receive clean GPS signal. Thus it can determine its position, and receive accurate weather forecast from the 'net (to which it is of course connected), to optimise consumption/heating (some suggested, that it could alternatively try to receive satellite photographs, which would then be processed by a neural network with nodes implemented in intelligent light switches). The reply was, that GPS is not needed at all, as the heater should be able to inquire the - of course also web-enabled - fridge, in which supermarkets does it order the food, from which the position can be determined by triangulation... :-)

PS2. What is "W2" you mention in your other post?

Jan