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iwitec Confidential Documentation 6
4.
Report and Data Format
4.1.
Mode A
LAS-604V2 reports temperature and alarm through LoRaWAN’s uplink. By default, LAS-604V2 will send a
temperature report every hours. In addition to temperature report, LAS-604V2 will read temperature every 5
minutes by default and compare read value with allowable temperature range. If read temperature is out of
allowable temperature range, an alarm will be sent. Besides, the allowable temperature range can be set by
downlink command.
Except temperature and status report, a LoRaWAN MAC command,
DeviceTimeReq
, is sent from LAS-
604V2 to server for time synchronization. Figure 8 depicts the entire sequence from power on.
Figure 8 LAS-604V2 Sequence Diagram
There are 3 uplink will be sent by LAS-604V2, temperate report, status report and temperature alarm. The
format of these 3 reports are described at following.
LAS-604V2
Server
Confirmed Status Report
DeviceTimeReq
Device Ready Report
Sleep 5 minutes
DeviceTimeReq
Power On
If previous
DeviceTimeReq fails
Temperature
Detection
Sleep 5 minutes
Confirmed Alarm Report
If temperature out of
allowable range
Confirmed Temperature Report
Every hour
(Depend on Setting)
.
.
.
Confirmed Temperature Report
If DeviceTimeReq success
Retry 3 times
