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Sensor device which measures surrounding conditions and obtains a newly measured value, retrieval device which utilizes a network to search sensor devices, and relay device which relays a communication between the sensor device and the retrieval device
Sensor device which measures surrounding conditions and obtains a newly measured value, retrieval device which utilizes a network to search sensor devices, and relay device which relays a communication between the sensor device and the retrieval device
The sensor device having an address storage unit 107 storing a channel address to be used, a temperature sensor 103, a table storage unit 101 storing an address table in which a measurement value is associated with a channel address, and an address specification unit 102 specifying a channel address associated with a measured value obtained from the temperature sensor 103. The sensor device also including an address update unit 105 updating the channel address in the address storage unit 107, a judgment unit 108 judging whether or not inquiry data is directed to the channel address stored in the address storage unit 107, a response generation unit 106 generating response data which is a response to the inquiry data, and a communication unit 109 transmitting the response data to a retrieval node 120. 展开▼
