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FPGA Based Single Chip Solution with 1-Wire Protocol for the Design of Smart Sensor Nodes

Applications that involve monitoring of water quality 
parameters require measuring devices to be placed at different 
geographical locations but are controlled centrally at a remote 
site. The measuring devices in such applications need to be small, 
consume low power, and must be capable of local processing tasks 
facilitating the mobility to span the measuring area in a vast geographic 
area. This paper presents the design of a generalized, low-cost, 
reconfigurable, reprogrammable smart sensor node 
using a ZigBee with a Field-Programmable Gate Array (FPGA) 
that embeds all processing and communication functionalities 
based on the IEEE 1451 family of standards. Design of the sensor 
nodes includes processing and transducer control functionalities 
in a single core increasing the speedup of processing power due to 
interprocess communication taking place within the chip itself. 
Results obtained by measuring the pH value and temperature 
of water samples verify the performance of the proposed sensor 
node.