Control device, sensor node, and computer-readable recording medium

A non-transitory computer-readable recording medium storing a control program that causes a computer to execute a process comprising:

• controlling calibration of sensing values in a sensor node group formed of sensor nodes each including a sensor and a wireless device and being capable of performing multi-hop communication;
• dividing the sensor node group into a plurality of clusters such that each of the clusters includes at least one partial cluster including a relay node and a child node that performs wireless communication;
• collecting an average of sensing values in each of the partial clusters from the relay node of each of the partial clusters;
• calculating a calibration reference value of each of the clusters from the collected averages of the respective partial clusters;
• and
• providing the calculated calibration reference value of each of the clusters to each of the clusters.

A sensor node that includes a sensor and a wireless device and that is capable of performing multi-hop communication, the sensor node comprising:

• a processor configured to:
• upon receiving an instruction signal for switching to a parent node mode, receive a beacon transmitted from another sensor node located near the subject node, accept the node serving as a transmission source of the received beacon as a child node of the subject node, and transmit a first instruction signal for transmission of a sensing value to the child node;
• upon receiving the sensing value from the child node in accordance with the first instruction signal for transmission, calculate an average of sensing values of a partial cluster including the subject node and the child node by obtaining an average of a sensing value of the subject node and the sensing value of the child node, transmit the calculated average of the sensing values to a control device through the multi-hop communication, and transmit the instruction signal for switching to the parent node mode to the child node;
• and
• upon receiving a second instruction signal for transmission of a sensing value, transmit the sensing value of the subject node to a node serving as a transmission source of the second instruction signal for transmission.