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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 174.5
edited by Xiaoling
on 2022/06/15 10:31
Change comment: There is no comment for this version
To version 172.5
edited by Xiaoling
on 2022/06/15 09:53
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -100,6 +100,8 @@
100 100  * IP66 Waterproof Enclosure
101 101  * 8500mAh Battery for long term use
102 102  
103 +
104 +
103 103  == 1.3  Suitable Container & Liquid ==
104 104  
105 105  * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
... ... @@ -109,6 +109,8 @@
109 109  ** Pure non metal material: <10 mm
110 110  * Pure liquid without irregular deposition.
111 111  
114 +
115 +
112 112  == 1.4  Mechanical ==
113 113  
114 114  [[image:image-20220615090910-1.png]]
... ... @@ -198,6 +198,9 @@
198 198  * Smart liquid control solution.
199 199  * Smart liquefied gas solution.
200 200  
205 +
206 +
207 +
201 201  == 1.7  Precautions ==
202 202  
203 203  * At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
... ... @@ -204,6 +204,9 @@
204 204  * For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
205 205  * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
206 206  
214 +
215 +
216 +
207 207  == 1.8  Pin mapping and power on ==
208 208  
209 209  
... ... @@ -217,7 +217,7 @@
217 217  == 2.1  How it works ==
218 218  
219 219  (((
220 -The LDDS20 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
230 +The LDDS20 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
221 221  )))
222 222  
223 223  (((
... ... @@ -311,7 +311,7 @@
311 311  
312 312  (((
313 313  (((
314 -LDDS20 will uplink payload via LoRaWAN with below payload format: 
324 +LDDS20 will uplink payload via LoRaWAN with below payload format:
315 315  
316 316  Uplink payload includes in total 8 bytes.
317 317  Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
... ... @@ -352,21 +352,20 @@
352 352  === 2.3.2  Distance ===
353 353  
354 354  (((
355 -Get the distance. Flat object range 20mm - 2000mm.
365 +Get the distance. Flat object range 280mm - 7500mm.
356 356  )))
357 357  
358 358  (((
359 -For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
369 +For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
360 360  )))
361 361  
362 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
363 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
364 364  
373 +* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
374 +* If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.
365 365  
366 -
367 367  === 2.3.3  Interrupt Pin ===
368 368  
369 -This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
378 +This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up.
370 370  
371 371  **Example:**
372 372  
... ... @@ -412,96 +412,538 @@
412 412  The payload decoder function for TTN V3 is here:
413 413  
414 414  (((
415 -LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
424 +LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
416 416  )))
417 417  
418 418  
419 419  
420 -== 2.4  Downlink Payload ==
429 +== 2.4  Uplink Interval ==
421 421  
422 -By default, LDDS20 prints the downlink payload to console port.
431 +The LDDS75 by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]]
423 423  
424 -[[image:image-20220615100930-15.png]]
425 425  
426 426  
427 -**Examples:**
435 +== 2.5  ​Show Data in DataCake IoT Server ==
428 428  
437 +(((
438 +[[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
439 +)))
429 429  
430 -* (% style="color:blue" %)**Set TDC**
441 +(((
442 +
443 +)))
431 431  
432 -If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
445 +(((
446 +(% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
447 +)))
433 433  
434 -Payload:    01 00 00 1E    TDC=30S
449 +(((
450 +(% style="color:blue" %)**Step 2**(%%)**: To configure the Application to forward data to DATACAKE you will need to add integration. To add the DATACAKE integration, perform the following steps:**
451 +)))
435 435  
436 -Payload:    01 00 00 3C    TDC=60S
437 437  
454 +[[image:1654592790040-760.png]]
438 438  
439 -* (% style="color:blue" %)**Reset**
440 440  
441 -If payload = 0x04FF, it will reset the LDDS20
457 +[[image:1654592800389-571.png]]
442 442  
443 443  
444 -* (% style="color:blue" %)**CFM**
460 +(% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
445 445  
446 -Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
462 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
447 447  
464 +[[image:1654851029373-510.png]]
448 448  
449 449  
450 -== 2.5  ​Show Data in DataCake IoT Server ==
467 +After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
451 451  
469 +[[image:image-20220610165129-11.png||height="595" width="1088"]]
470 +
471 +
472 +
473 +== 2.6  Frequency Plans ==
474 +
452 452  (((
453 -[[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
476 +The LDDS75 uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.
454 454  )))
455 455  
479 +
480 +
481 +=== 2.6.1  EU863-870 (EU868) ===
482 +
456 456  (((
484 +(% style="color:blue" %)**Uplink:**
485 +)))
486 +
487 +(((
488 +868.1 - SF7BW125 to SF12BW125
489 +)))
490 +
491 +(((
492 +868.3 - SF7BW125 to SF12BW125 and SF7BW250
493 +)))
494 +
495 +(((
496 +868.5 - SF7BW125 to SF12BW125
497 +)))
498 +
499 +(((
500 +867.1 - SF7BW125 to SF12BW125
501 +)))
502 +
503 +(((
504 +867.3 - SF7BW125 to SF12BW125
505 +)))
506 +
507 +(((
508 +867.5 - SF7BW125 to SF12BW125
509 +)))
510 +
511 +(((
512 +867.7 - SF7BW125 to SF12BW125
513 +)))
514 +
515 +(((
516 +867.9 - SF7BW125 to SF12BW125
517 +)))
518 +
519 +(((
520 +868.8 - FSK
521 +)))
522 +
523 +(((
457 457  
458 458  )))
459 459  
460 460  (((
461 -(% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
528 +(% style="color:blue" %)**Downlink:**
462 462  )))
463 463  
464 464  (((
465 -(% style="color:blue" %)**Step 2**(%%)**: To configure the Application to forward data to DATACAKE you will need to add integration. To add the DATACAKE integration, perform the following steps:**
532 +Uplink channels 1-9 (RX1)
466 466  )))
467 467  
535 +(((
536 +869.525 - SF9BW125 (RX2 downlink only)
537 +)))
468 468  
469 -[[image:1654592790040-760.png]]
470 470  
471 471  
472 -[[image:1654592800389-571.png]]
541 +=== 2.6.2  US902-928(US915) ===
473 473  
543 +(((
544 +Used in USA, Canada and South America. Default use CHE=2
474 474  
475 -(% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
546 +(% style="color:blue" %)**Uplink:**
476 476  
477 -(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
548 +903.9 - SF7BW125 to SF10BW125
478 478  
479 -[[image:1654851029373-510.png]]
550 +904.1 - SF7BW125 to SF10BW125
480 480  
552 +904.3 - SF7BW125 to SF10BW125
481 481  
482 -After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
554 +904.5 - SF7BW125 to SF10BW125
483 483  
484 -[[image:image-20220610165129-11.png||height="595" width="1088"]]
556 +904.7 - SF7BW125 to SF10BW125
485 485  
558 +904.9 - SF7BW125 to SF10BW125
486 486  
560 +905.1 - SF7BW125 to SF10BW125
487 487  
488 -== 2.6  LED Indicator ==
562 +905.3 - SF7BW125 to SF10BW125
489 489  
490 -The LDDS20 has an internal LED which is to show the status of different state.
491 491  
565 +(% style="color:blue" %)**Downlink:**
492 492  
567 +923.3 - SF7BW500 to SF12BW500
568 +
569 +923.9 - SF7BW500 to SF12BW500
570 +
571 +924.5 - SF7BW500 to SF12BW500
572 +
573 +925.1 - SF7BW500 to SF12BW500
574 +
575 +925.7 - SF7BW500 to SF12BW500
576 +
577 +926.3 - SF7BW500 to SF12BW500
578 +
579 +926.9 - SF7BW500 to SF12BW500
580 +
581 +927.5 - SF7BW500 to SF12BW500
582 +
583 +923.3 - SF12BW500(RX2 downlink only)
584 +
585 +
586 +
587 +)))
588 +
589 +=== 2.6.3  CN470-510 (CN470) ===
590 +
591 +(((
592 +Used in China, Default use CHE=1
593 +)))
594 +
595 +(((
596 +(% style="color:blue" %)**Uplink:**
597 +)))
598 +
599 +(((
600 +486.3 - SF7BW125 to SF12BW125
601 +)))
602 +
603 +(((
604 +486.5 - SF7BW125 to SF12BW125
605 +)))
606 +
607 +(((
608 +486.7 - SF7BW125 to SF12BW125
609 +)))
610 +
611 +(((
612 +486.9 - SF7BW125 to SF12BW125
613 +)))
614 +
615 +(((
616 +487.1 - SF7BW125 to SF12BW125
617 +)))
618 +
619 +(((
620 +487.3 - SF7BW125 to SF12BW125
621 +)))
622 +
623 +(((
624 +487.5 - SF7BW125 to SF12BW125
625 +)))
626 +
627 +(((
628 +487.7 - SF7BW125 to SF12BW125
629 +)))
630 +
631 +(((
632 +
633 +)))
634 +
635 +(((
636 +(% style="color:blue" %)**Downlink:**
637 +)))
638 +
639 +(((
640 +506.7 - SF7BW125 to SF12BW125
641 +)))
642 +
643 +(((
644 +506.9 - SF7BW125 to SF12BW125
645 +)))
646 +
647 +(((
648 +507.1 - SF7BW125 to SF12BW125
649 +)))
650 +
651 +(((
652 +507.3 - SF7BW125 to SF12BW125
653 +)))
654 +
655 +(((
656 +507.5 - SF7BW125 to SF12BW125
657 +)))
658 +
659 +(((
660 +507.7 - SF7BW125 to SF12BW125
661 +)))
662 +
663 +(((
664 +507.9 - SF7BW125 to SF12BW125
665 +)))
666 +
667 +(((
668 +508.1 - SF7BW125 to SF12BW125
669 +)))
670 +
671 +(((
672 +505.3 - SF12BW125 (RX2 downlink only)
673 +)))
674 +
675 +
676 +
677 +=== 2.6.4  AU915-928(AU915) ===
678 +
679 +(((
680 +Default use CHE=2
681 +
682 +(% style="color:blue" %)**Uplink:**
683 +
684 +916.8 - SF7BW125 to SF12BW125
685 +
686 +917.0 - SF7BW125 to SF12BW125
687 +
688 +917.2 - SF7BW125 to SF12BW125
689 +
690 +917.4 - SF7BW125 to SF12BW125
691 +
692 +917.6 - SF7BW125 to SF12BW125
693 +
694 +917.8 - SF7BW125 to SF12BW125
695 +
696 +918.0 - SF7BW125 to SF12BW125
697 +
698 +918.2 - SF7BW125 to SF12BW125
699 +
700 +
701 +(% style="color:blue" %)**Downlink:**
702 +
703 +923.3 - SF7BW500 to SF12BW500
704 +
705 +923.9 - SF7BW500 to SF12BW500
706 +
707 +924.5 - SF7BW500 to SF12BW500
708 +
709 +925.1 - SF7BW500 to SF12BW500
710 +
711 +925.7 - SF7BW500 to SF12BW500
712 +
713 +926.3 - SF7BW500 to SF12BW500
714 +
715 +926.9 - SF7BW500 to SF12BW500
716 +
717 +927.5 - SF7BW500 to SF12BW500
718 +
719 +923.3 - SF12BW500(RX2 downlink only)
720 +
721 +
722 +
723 +)))
724 +
725 +=== 2.6.5  AS920-923 & AS923-925 (AS923) ===
726 +
727 +(((
728 +(% style="color:blue" %)**Default Uplink channel:**
729 +)))
730 +
731 +(((
732 +923.2 - SF7BW125 to SF10BW125
733 +)))
734 +
735 +(((
736 +923.4 - SF7BW125 to SF10BW125
737 +)))
738 +
739 +(((
740 +
741 +)))
742 +
743 +(((
744 +(% style="color:blue" %)**Additional Uplink Channel**:
745 +)))
746 +
747 +(((
748 +(OTAA mode, channel added by JoinAccept message)
749 +)))
750 +
751 +(((
752 +
753 +)))
754 +
755 +(((
756 +(% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
757 +)))
758 +
759 +(((
760 +922.2 - SF7BW125 to SF10BW125
761 +)))
762 +
763 +(((
764 +922.4 - SF7BW125 to SF10BW125
765 +)))
766 +
767 +(((
768 +922.6 - SF7BW125 to SF10BW125
769 +)))
770 +
771 +(((
772 +922.8 - SF7BW125 to SF10BW125
773 +)))
774 +
775 +(((
776 +923.0 - SF7BW125 to SF10BW125
777 +)))
778 +
779 +(((
780 +922.0 - SF7BW125 to SF10BW125
781 +)))
782 +
783 +(((
784 +
785 +)))
786 +
787 +(((
788 +(% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
789 +)))
790 +
791 +(((
792 +923.6 - SF7BW125 to SF10BW125
793 +)))
794 +
795 +(((
796 +923.8 - SF7BW125 to SF10BW125
797 +)))
798 +
799 +(((
800 +924.0 - SF7BW125 to SF10BW125
801 +)))
802 +
803 +(((
804 +924.2 - SF7BW125 to SF10BW125
805 +)))
806 +
807 +(((
808 +924.4 - SF7BW125 to SF10BW125
809 +)))
810 +
811 +(((
812 +924.6 - SF7BW125 to SF10BW125
813 +)))
814 +
815 +(((
816 +
817 +)))
818 +
819 +(((
820 +(% style="color:blue" %)**Downlink:**
821 +)))
822 +
823 +(((
824 +Uplink channels 1-8 (RX1)
825 +)))
826 +
827 +(((
828 +923.2 - SF10BW125 (RX2)
829 +)))
830 +
831 +
832 +
833 +=== 2.6.6  KR920-923 (KR920) ===
834 +
835 +(((
836 +(% style="color:blue" %)**Default channel:**
837 +)))
838 +
839 +(((
840 +922.1 - SF7BW125 to SF12BW125
841 +)))
842 +
843 +(((
844 +922.3 - SF7BW125 to SF12BW125
845 +)))
846 +
847 +(((
848 +922.5 - SF7BW125 to SF12BW125
849 +)))
850 +
851 +(((
852 +
853 +)))
854 +
855 +(((
856 +(% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
857 +)))
858 +
859 +(((
860 +922.1 - SF7BW125 to SF12BW125
861 +)))
862 +
863 +(((
864 +922.3 - SF7BW125 to SF12BW125
865 +)))
866 +
867 +(((
868 +922.5 - SF7BW125 to SF12BW125
869 +)))
870 +
871 +(((
872 +922.7 - SF7BW125 to SF12BW125
873 +)))
874 +
875 +(((
876 +922.9 - SF7BW125 to SF12BW125
877 +)))
878 +
879 +(((
880 +923.1 - SF7BW125 to SF12BW125
881 +)))
882 +
883 +(((
884 +923.3 - SF7BW125 to SF12BW125
885 +)))
886 +
887 +(((
888 +
889 +)))
890 +
891 +(((
892 +(% style="color:blue" %)**Downlink:**
893 +)))
894 +
895 +(((
896 +Uplink channels 1-7(RX1)
897 +)))
898 +
899 +(((
900 +921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
901 +)))
902 +
903 +
904 +
905 +=== 2.6.7  IN865-867 (IN865) ===
906 +
907 +(((
908 +(% style="color:blue" %)**Uplink:**
909 +)))
910 +
911 +(((
912 +865.0625 - SF7BW125 to SF12BW125
913 +)))
914 +
915 +(((
916 +865.4025 - SF7BW125 to SF12BW125
917 +)))
918 +
919 +(((
920 +865.9850 - SF7BW125 to SF12BW125
921 +)))
922 +
923 +(((
924 +
925 +)))
926 +
927 +(((
928 +(% style="color:blue" %)**Downlink:**
929 +)))
930 +
931 +(((
932 +Uplink channels 1-3 (RX1)
933 +)))
934 +
935 +(((
936 +866.550 - SF10BW125 (RX2)
937 +)))
938 +
939 +
940 +
941 +== 2.7  LED Indicator ==
942 +
943 +The LDDS75 has an internal LED which is to show the status of different state.
944 +
945 +
493 493  * Blink once when device power on.
494 494  * The device detects the sensor and flashes 5 times.
495 495  * Solid ON for 5 seconds once device successful Join the network.
496 496  * Blink once when device transmit a packet.
497 497  
951 +== 2.8  ​Firmware Change Log ==
498 498  
499 499  
500 -== 2.7  ​Firmware Change Log ==
501 -
502 -
503 503  (((
504 -**Firmware download link:  **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
955 +**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
505 505  )))
506 506  
507 507  (((
... ... @@ -509,38 +509,44 @@
509 509  )))
510 510  
511 511  (((
512 -**Firmware Upgrade Method:  [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]**
963 +**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
513 513  )))
514 514  
515 515  
516 516  
517 -== 2.8  Battery Analysis ==
968 +== 2.9  Mechanical ==
518 518  
519 519  
971 +[[image:image-20220610172003-1.png]]
520 520  
521 521  
522 -=== 2.8.1  Battery Type ===
974 +[[image:image-20220610172003-2.png]]
523 523  
524 -The LDDS20 battery is a combination of a 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
525 525  
526 526  
978 +== 2.10  Battery Analysis ==
979 +
980 +=== 2.10.1  Battery Type ===
981 +
982 +The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
983 +
984 +
527 527  The battery related documents as below:
528 528  
529 529  * (((
530 -[[Battery Dimension>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]],
988 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
531 531  )))
532 532  * (((
533 -[[Lithium-Thionyl Chloride Battery  datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]],
991 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
534 534  )))
535 535  * (((
536 -[[Lithium-ion Battery-Capacitor datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
994 +[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
537 537  )))
538 538  
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540 540  
541 541  
542 542  
543 -
544 544  === 2.10.2  Replace the battery ===
545 545  
546 546  (((
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