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Changes for page DMT01

Last modified by Xiaoling on 2025/08/15 17:26
From version 57.1
edited by Mengting Qiu
on 2025/08/05 08:46
Change comment: Uploaded new attachment "1754354818964-624.jpeg", version {1}
To version 61.2
edited by Mengting Qiu
on 2025/08/05 14:25
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399 399  
400 400  == 2.4 Bluetoothe Broadcast Payload ==
401 401  
402 -=== 2.4.1 How to use the scanning tool ===
403 -
404 -
405 -
406 -
407 -=== 2.4.2 Data Analysis ===
408 -
409 409  Scan and obtain DMT01 device broadcast data through a third-party mobile phone app (such as nRF Connect)
410 410  
411 411  Example：
... ... @@ -490,25 +490,246 @@
490 490  
491 491  
492 492  
493 -= 3. Configure DMT01  ~-~- 需要修改 =
486 +== 2.5 Datalog Feature ==
494 494  
495 -== 3.1 Configure Methods ==
496 496  
497 -User can use LoRaWAN downlink command to configure the DMT01
489 +Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DMT01 will store the reading for future retrieving purposes.
498 498  
491 +
492 +=== 2.5.1 How datalog works ===
493 +
494 +
495 +DMT01 will wait for ACK for every uplink, when there is no LoRaWAN network,DMT01 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.
496 +
497 +* (((
498 +a) DMT01 will do an ACK check for data records sending to make sure every data arrive server.
499 +)))
500 +* (((
501 +b) DMT01 will send data in **CONFIRMED Mode**, but DMT01 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 DMT01 gets a ACK, DMT01 will consider there is a network connection and resend all NONE-ACK messages.
502 +
503 +
504 +)))
505 +
506 +=== 2.5.2 Enable Datalog ===
507 +
508 +Using the platform downlink** 07 01**, you can enable the device to automatically send **non-ACK** messages. Once enabled, the LC01 will wait for an acknowledgment (ACK) for every uplink. If there is no LoRaWAN network available, DMT01 will mark these records as non-ACK messages, store the sensor data, and continue checking for network availability (at 10-second intervals) to resend all stored messages once the network is restored.
509 +
510 +* (((
511 +a) DMT01 performs an ACK check for each data record to ensure it successfully reaches the server.
512 +)))
513 +* (((
514 +b) When automatic sending of non-ACK messages is enabled, the DMT01 transmits data in **CONFIRMED** mode. If an ACK is not received, it does not resend the packet; instead, it marks it as a **non-ACK** message. During subsequent uplinks, if the DMT01 receives an ACK, it considers the network restored and will resend all stored non-ACK messages.
515 +)))
516 +
517 +
518 +
519 +=== 2.5.3 Unix TimeStamp ===
520 +
521 +
522 +DMT01 uses Unix TimeStamp format based on
523 +
524 +[[image:1754354802681-163.jpeg]]
525 +
526 +User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
527 +
528 +Below is the converter example
529 +
530 +[[image:1754354818964-624.jpeg]]
531 +
532 +
533 +
534 +=== 2.5.4 Set Device Time ===
535 +
536 +
537 +You need to run downlink command 28 01 to enable time synchronization.
538 +
539 +Once the LC01 joins the LoRaWAN network, it will send the MAC command **DeviceTimeReq**, and the server will reply with **DeviceTimeAns** to provide the current time to the LC01. If the LC01 fails to receive the time from the server, it will use its internal time and wait for the next time request. //(By default, this occurs once every 10 days.)//
540 +
541 +{{info}}
542 +The LoRaWAN server must support LoRaWAN v1.0.3 (MAC v1.0.3) or higher to use this MAC command feature. ChirpStack, The Things Stack v3, and Loriot support it, but The Things Stack v2 does not. If the server does not support this command, it will discard the uplink packet containing it. As a result, the user will lose the time request packet when the automatic time synchronization function is enabled on TTN v2.
543 +{{/info}}
544 +
545 +(% style="color:#4f81bd" %)**Downlink Command: 0x28**
546 +
547 +* Example: 0x28 01  ~/~/ Automatic time synchronization Enabled
548 +* Example: 0x28 00  ~/~/  Automatic time synchronization Disable.
549 +
550 +
551 +
552 +=== 2.5.5 Datalog Uplink payload (FPORT~=3) ===
553 +
554 +
555 +The Datalog uplinks will use below payload format.
556 +
557 +**Retrieval data payload:**
558 +
559 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
560 +|=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
561 +**Size(bytes)**
562 +)))|=(% style="width: 40px;background-color:#4F81BD;color:white" %)4|=(% style="width: 90px;background-color:#4F81BD;color:white" %)1|=(% style="width: 150px; background-color: #4F81BD;color:white" %)6|=(% style="width: 80px; background-color: #4F81BD;color:white" %)1|=(% style="width: 80px; background-color: #4F81BD;color:white" %)1|=(% style="width: 80px; background-color: #4F81BD;color:white" %)1|=(% style="width: 80px; background-color: #4F81BD;color:white" %)2|=(% style="width: 80px; background-color: #4F81BD;color:white" %)2
563 +|(% style="width:99px" %)Value|(% style="width:69px" %)(((
564 +Timestamp
565 +
566 +
567 +)))|(% style="width:130px" %)DevMode|(% style="width:194px" %)MACaddr|(% style="width:106px" %)ProbeBat|(% style="width:97px" %)(((
568 +BoxBat
569 +)))|(% style="width:97px" %)Message Type|(% style="width:97px" %)Food temperature|(% style="width:97px" %)Ambient temperature
570 +
571 +**No ACK Message**:  1: This message means this payload is fromn Uplink Message which doesn't get ACK from the server before ( for **PNACKMD=1** feature)
572 +
573 +**Poll Message Flag**: 1: This message is a poll message reply.
574 +
575 +* Poll Message Flag is set to 1.
576 +
577 +* Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
578 +
579 +For example, in US915 band, the max payload for different DR is:
580 +
581 +**a) DR0:** max is 11 bytes so one entry of data
582 +
583 +**b) DR1:** max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
584 +
585 +**c) DR2:** total payload includes 11 entries of data
586 +
587 +**d) DR3: **total payload includes 22 entries of data.
588 +
589 +If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
590 +
591 +**Example:**
592 +
593 +If DMT01 has below data inside Flash:
594 +
595 +[[image:image-20230524114654-2.png]]
596 +
597 +
598 +If user sends below downlink command: 31646D84E1646D856C05
599 +
600 +Where : Start time: 646D84E1 = time 23/5/24 03:30:41
601 +
602 + Stop time: 646D856C= time 23/5/24 03:33:00
603 +
604 +
605 +DMT01 **will uplink this payload.**
606 +
607 +[[image:image-20230524114826-3.png||height="448" width="1244"]]
608 +
499 499  (((
610 +00 00 02 36 01 10 40 64 6D 84 E1 00 00 02 37 01 10 40 64 6D 84 F8 00 00 02 37 01 0F 40 64 6D 85 04 00 00 02 3A 01 0F 40 64 6D 85 18 00 00 02 3C 01 0F 40 64 6D 85 36 00 00 02 3D 01 0E 40 64 6D 85 3F 00 00 02 3F 01 0E 40 64 6D 85 60 00 00 02 40 01 0E 40 64 6D 85 6A
611 +)))
612 +
500 500  (((
501 -== 3.2 Downlink Commands Set ==
614 +Where the first 11 bytes is for the first entry:
615 +)))
502 502  
617 +(((
618 +00 00 02 36 01 10 40 64 6D 84 E1
619 +)))
503 503  
504 -(% class="box infomessage" %)
505 505  (((
506 -To be updated...
622 +**Hum**=0x0236/10=56.6
507 507  )))
624 +
625 +(((
626 +**Temp**=0x0110/10=27.2
508 508  )))
628 +
629 +(((
630 +**poll message flag & Alarm Flag & Level of PA8**=0x40,means reply data,sampling uplink message,the PA8 is low level.
509 509  )))
510 510  
633 +(((
634 +**Unix time** is 0x646D84E1=1684899041s=23/5/24 03:30:41
635 +)))
511 511  
637 +
638 += 3. Configure DMT01  ~-~- 需要修改 =
639 +
640 +== 3.1 Configure Methods ==
641 +
642 +User can use LoRaWAN downlink command to configure the DMT01
643 +
644 +(((
645 +== 3.2 Downlink Commands Set ==
646 +
647 +
648 +=== 3.2.1 Set Transmit Interval Time ===
649 +
650 +
651 +(% style="color:#037691" %)**AT Command:**
652 +
653 +There is no AT command to set TDC time.
654 +
655 +
656 +**Feature**: Change LoRaWAN End Node Transmit Interval.
657 +
658 +(% style="color:blue" %)**Downlink Command: 0x01**
659 +
660 +Format: Command Code (0x01) followed by 3 bytes time value.
661 +
662 +If the downlink payload is **0100003C**, it means set the end node's transmit Interval is set to 0x00003C = 60 seconds, with the type code 01.
663 +
664 +* **Example 1**: Downlink Payload: 0100001E  ~/~/  Sets the transmit interval (TDC) to 30 seconds
665 +* **Example 2**: Downlink Payload: 0100003C  ~/~/  Sets the transmit interval (TDC) to 60 seconds
666 +
667 +
668 +
669 +=== 3.2.2 Get Device Status ===
670 +
671 +
672 +Send a LoRaWAN downlink to request the device's alarm settings.
673 +
674 +
675 +(% style="color:blue" %)**Downlink Payload:  **(%%)**0x26 01**
676 +
677 +The sensor will upload device status via FPort=5. See the payload section for details.
678 +
679 +
680 +=== 3.2.3 Clear Flash Record ===
681 +
682 +
683 +(% style="color:#037691" %)**AT Command:**
684 +
685 +There is no AT command to enable or disable the relay.
686 +
687 +
688 +**Feature**: Clear flash storage for the  data log feature.
689 +
690 +(% style="color:#4f81bd" %)**Downlink Command: 0x08**
691 +
692 +* Example: 0x0801  ~/~/ Clears all saved data in flash.
693 +
694 +
695 +
696 +=== 3.2.4 Confirmed Mode ===
697 +
698 +
699 +(% style="color:#037691" %)**AT Command:**
700 +
701 +There is no AT command to control whether Confirmed Mode is enabled or disabled.
702 +
703 +
704 +**Feature**: Mode for sending data that requires acknowledgment.
705 +
706 +(% style="color:#4f81bd" %)**Downlink Command: 0x07**
707 +
708 +* Example: 0x07 01  ~/~/ Confirmed Mode enabled.
709 +* Example: 0x07 00  ~/~/  Confirmed Mode disable.
710 +
711 +
712 +
713 +=== 3.2.5 Set the time synchronization interval ===
714 +
715 +
716 +**Feature**: Set how often to perform time synchronization (default: 10 days, unit: days)
717 +
718 +(% style="color:#4f81bd" %)**Downlink Command: 0x28**
719 +
720 +* Example: 0x28 01  ~/~/ Synchronize once a day
721 +* Example: 0x28 03  ~/~/  Synchronize once every three days
722 +)))
723 +
724 +
725 +
512 512  = 4. Firmware update =
513 513  
514 514  
... ... @@ -516,7 +516,7 @@
516 516  
517 517  User can upgrade the firmware for DMT01 charger. The charger include two piece of software:
518 518  
519 -* For LoRa part: OTA firmware update via LoRa:.
733 +* For LoRa part: OTA firmware update via LoRa.
520 520  
521 521  * For BLE and controller part.
522 522