we are actually trying to implement zigbee to control 3 parameters(heat,temperature,pressure) for industrial automation using a single microcontroller(P89V51RD2).Actually we are not getting how to interface these 3 sensors all together on to the controller,so could you please send us the project which you did on green house monitoring (send us the circuit and program which you built) so that we can work on the same lines.Also we are thinking of ommiting the pc and use another microcontroller instead of the pc so that we can make it completely independent of the pc.