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Last modified by Xiaoling on 2025/07/10 16:21
From version 146.1
edited by Xiaoling
on 2025/06/10 15:28
Change comment: There is no comment for this version
To version 146.3
edited by Mengting Qiu
on 2025/07/08 10:58
Change comment: There is no comment for this version

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624 624  == 2.6 Datalog Feature (Since V1.1) ==
625 625  
626 626  
627 -When a user wants to retrieve sensor value, he can send a poll command from the IoT platform to ask the sensor to send value in the required time slot.
627 +Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, PS-LB will store the reading for future retrieving purposes.
628 628  
629 629  
630 -=== 2.6.1 Unix TimeStamp ===
630 +=== 2.5.1 How datalog works ===
631 631  
632 632  
633 -PS-LB uses Unix TimeStamp format based on
633 +PS-LB will wait for ACK for every uplink, when there is no LoRaWAN network,PS-LB will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
634 634  
635 -[[image:image-20250401163826-3.jpeg]]
635 +* (((
636 +a) PS-LB will do an ACK check for data records sending to make sure every data arrive server.
637 +)))
638 +* (((
639 +b) PS-LB will send data in **CONFIRMED Mode**, but PS-LB won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if PS-LB gets a ACK, PS-LB will consider there is a network connection and resend all NONE-ACK messages.
636 636  
637 -Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
641 +
642 +)))
638 638  
639 -Below is the converter example:
644 +=== 2.5.2 Enable Datalog ===
640 640  
641 -[[image:image-20250401163906-4.jpeg]]
642 642  
647 +User need to make sure below two settings are enable to use datalog;
643 643  
644 -=== 2.6.2 Set Device Time ===
649 +* (% style="color:blue" %)**SYNCMOD=1(Default)**(%%) to enable sync time via LoRaWAN MAC command, click here ([[AT+SYNCMOD>>https://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H4.6Settimesynchronizationmethod28ThenetworkservermustsupportLoRaWANv1.0.329]]) for detailed instructions.
650 +* (% style="color:blue" %)**PNACKMD=1**(%%)** **to enable datalog feature, click here ([[AT+PNACKMD>>https://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.26RequesttheservertosendanACK]]) for detailed instructions.
645 645  
646 646  
647 -There are two ways to set the device's time:
648 648  
654 +Once PS-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to PS-LB. If PS-LB fails to get the time from the server, PS-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
649 649  
650 -~1. Through LoRaWAN MAC Command (Default settings)
656 +(% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.**
651 651  
652 -Users need to set SYNCMOD=1 to enable sync time via the MAC command.
653 653  
654 -Once CPL01 Joined the LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to CPL01. If CPL01 fails to get the time from the server, CPL01 will use the internal time and wait for the next time request ~[[[via Device Status (FPORT=5)>>url:http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/CPL01%20LoRaWAN%20Outdoor%20PulseContact%20%20Sensor%20Manual/#H2.3.1DeviceStatus2CFPORT3D5]]].
659 +=== 2.6.1 Unix TimeStamp ===
655 655  
656 -Note: LoRaWAN Server needs to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature.
657 657  
662 +PS-LB uses Unix TimeStamp format based on
658 658  
659 - 2. Manually Set Time
664 +[[image:image-20250401163826-3.jpeg]]
660 660  
661 -Users need to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
666 +Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
662 662  
668 +Below is the converter example:
663 663  
670 +[[image:image-20250401163906-4.jpeg]]
671 +
672 +
664 664  === 2.6.3 Poll sensor value ===
665 665  
666 666  Users can poll sensor values based on timestamps. Below is the downlink command.