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402	402	== 2.6 Datalog Feature ==
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404		-Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LHT65N will store the reading for future retrieving purposes. There are two ways for IoT servers to get datalog from LHT65N.
	404	+This feature is always enabled. When user wants to retrieve the sensor value, he can send a poll command from the IoT platform to ask LHT65N to send the value in the required time slot.
405	405
406		-=== 2.6.1 Ways to get datalog via LoRaWAN ===
	406	+=== 2.6.1 Unix TimeStamp ===
407	407
408		-There are two methods:
409		-
410		-1. IoT Server sends a downlink LoRaWAN command to [poll the value>PollSensorValue].
411		-1.
412		-
413		-
414		-=== 2.6.2 Unix TimeStamp ===
415		-
416	416	LHT65N uses Unix TimeStamp format based on
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418	418	[[image:image-20220523001219-11.png||height="97" width="627"]]
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431	431	So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
432	432
433		-=== 2.6.3 Set Device Time ===
	425	+=== 2.6.2 Set Device Time ===
434	434
435	435	(((
436	436	There are two ways to set device’s time:
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464	464	User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
465	465	)))
466	466
467		-=== [[2.6.4 Poll sensor value>>2.6.4 Poll sensor value||anchor="PollSensorValue"]] ===
	459	+=== 2.6.3 Poll sensor value ===
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469	469	User can poll sensor value based on timestamps from the server. Below is the downlink command.
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487	487	)))
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490		-=== 2.6.5 Datalog Uplink payload ===
	482	+=== 2.6.4 Datalog Uplink payload ===
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492	492	The Datalog poll reply uplink will use below payload format.
493	493