@Holmes, i dont think the question is sily as isa100 is a protocol like zigbee. my data logger software (vb based) and xbee explorer has sucessfuly working with lm35 temp sensor that connected to xb tx. now, i got additional sensor that working in isa100 protocol. so, i would not build another arduino based data logger that connect to isa100 based transmitter. i would prefer to make an interface script between isa100 and zigbee.
anyway, zigbee,isa100, and wirelessHart is developed based on IEEE 802.15.4 (low rate WPAN).
just now i got some article that showing me some good news to make it happen
thanks for kind response