ITK SAS FLOW001 ユーザーズマニュアル
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Heartbeat
The purpose of the “heartbeat” message is to check daily that the flow sensor is still on and able to
send data to the AgTech gateway.
Heartbeat every 12 hours
Outside the irrigation phases, the flow sensor sends a heartbeat message every 12 hours to the
AgTech gateway. The heartbeat message contains a timestamp and the amount of water (in mL) that
has flown through the flow meter since the last irrigation stop event. This residual amount of water
can be due to small leaks in the irrigation system or to measurement noise. The heartbeat frame
transmission is deactivated during irrigation phases.
Heartbeat at gateway discovery
During flow sensor installation, if the gateway discovery is successful, the gateway sends a first
“heartbeat” message to the distant server. See Installation section for more details.
Heartbeat after the “link check” process
During flow sensor installation, if the “link check” process is successful, the gateway sends a
“heartbeat” message to the distant server. See Installation section for more details.