Changes for page PS-LB/LS -- LoRaWAN Air Water Pressure Sensor User Manual
Last modified by Xiaoling on 2025/04/19 17:58
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... ... @@ -60,6 +60,7 @@ 60 60 * 8500mAh Battery for long term use 61 61 * Controllable 3.3v,5v and 12v output to power external sensor 62 62 63 + 63 63 == 1.3 Specification == 64 64 65 65 ... ... @@ -106,6 +106,7 @@ 106 106 * Sleep Mode: 5uA @ 3.3v 107 107 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm 108 108 110 + 109 109 == 1.4 Probe Types == 110 110 111 111 === 1.4.1 Thread Installation Type === ... ... @@ -124,6 +124,7 @@ 124 124 * Operating temperature: -20℃~~60℃ 125 125 * Connector Type: Various Types, see order info 126 126 129 + 127 127 === 1.4.2 Immersion Type === 128 128 129 129 ... ... @@ -137,6 +137,7 @@ 137 137 * Operating temperature: 0℃~~50℃ 138 138 * Material: 316 stainless steels 139 139 143 + 140 140 == 1.5 Probe Dimension == 141 141 142 142 ... ... @@ -207,6 +207,7 @@ 207 207 ))) 208 208 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means PS-LB-NA is in Deep Sleep Mode. 209 209 214 + 210 210 == 1.9 Pin Mapping == 211 211 212 212 ... ... @@ -384,7 +384,7 @@ 384 384 |(% style="width:97px" %)((( 385 385 **Size(bytes)** 386 386 )))|(% style="width:48px" %)**2**|(% style="width:71px" %)**2**|(% style="width:98px" %)**2**|(% style="width:73px" %)**2**|(% style="width:122px" %)**1** 387 -|(% style="width:97px" %)**Value**|(% style="width:48px" %)[[BAT>>||anchor="H2.3. 4BatteryInfo"]]|(% style="width:71px" %)[[Probe Model>>||anchor="H2.3.5ProbeModel"]]|(% style="width:98px" %)[[0 ~~~~ 20mA value>>||anchor="H2.3.607E20mAvalue28IDC_IN29"]]|(% style="width:73px" %)[[0 ~~~~ 30v value>>||anchor="H2.3.707E30Vvalue28pinVDC_IN29"]]|(% style="width:122px" %)[[IN1 &IN2 Interrupt flag>>||anchor="H2.3.8IN126IN226INTpin"]]392 +|(% style="width:97px" %)**Value**|(% style="width:48px" %)[[BAT>>||anchor="H2.3.3BatteryInfo"]]|(% style="width:71px" %)[[Probe Model>>||anchor="H2.3.4ProbeModel"]]|(% style="width:98px" %)[[0 ~~~~ 20mA value>>||anchor="H2.3.507E20mAvalue28IDC_IN29"]]|(% style="width:73px" %)[[0 ~~~~ 30v value>>||anchor="H2.3.607E30Vvalue28pinVDC_IN29"]]|(% style="width:122px" %)[[IN1 &IN2 Interrupt flag>>||anchor="H2.3.7IN126IN226INTpin"]] 388 388 389 389 [[image:1675144608950-310.png]] 390 390 ... ... @@ -405,7 +405,7 @@ 405 405 PS-LB has different kind of probe, 4~~20mA represent the full scale of the measuring range. So a 12mA output means different meaning for different probe. 406 406 407 407 408 -For example. 413 +**For example.** 409 409 410 410 (% border="1" cellspacing="4" style="width:510px" %) 411 411 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Part Number**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Probe Used**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4~~20mA scale**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Example: 12mA meaning** ... ... @@ -453,7 +453,7 @@ 453 453 09 (H): (0x09&0x04)>>2=0 IN2 pin is low level. 454 454 455 455 456 -This data field shows if this packet is generated by (% style="color:blue" %)**Interrupt Pin** (%%)or not. [[Click here>>||anchor="H3.2SetInterruptMode"]] for the hardware and software set up. Note: The Internet Pin is a separate pin in the screw terminal. 461 +This data field shows if this packet is generated by (% style="color:blue" %)**Interrupt Pin** (%%)or not. [[Click here>>||anchor="H3.3.2SetInterruptMode"]] for the hardware and software set up. Note: The Internet Pin is a separate pin in the screw terminal. 457 457 458 458 (% style="color:#037691" %)**Example:** 459 459 ... ... @@ -467,11 +467,11 @@ 467 467 === (% id="cke_bm_109176S" style="display:none" %) (%%)2.3.8 Sensor value, FPORT~=7 === 468 468 469 469 470 -(% border="1" cellspacing="4" style="background-color:#f 7faff;color:black;width:508.222px" %)475 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:508.222px" %) 471 471 |(% style="width:94px" %)((( 472 472 **Size(bytes)** 473 473 )))|(% style="width:43px" %)2|(% style="width:367px" %)n 474 -|(% style="width:94px" %)**Value**|(% style="width:43px" %)[[BAT>>||anchor="H2.3. 4BatteryInfo"]]|(% style="width:367px" %)(((479 +|(% style="width:94px" %)**Value**|(% style="width:43px" %)[[BAT>>||anchor="H2.3.3BatteryInfo"]]|(% style="width:367px" %)((( 475 475 Voltage value, each 2 bytes is a set of voltage values. 476 476 ))) 477 477 ... ... @@ -566,14 +566,17 @@ 566 566 567 567 == 3.1 Configure Methods == 568 568 574 + 569 569 PS-LB-NA supports below configure method: 570 570 571 571 * AT Command via Bluetooth Connection (**Recommand Way**): [[BLE Configure Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]]. 572 -* AT Command via UART Connection : See [[FAQ>> url:http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/#H7.FAQ]].578 +* AT Command via UART Connection : See [[FAQ>>||anchor="H6.FAQ"]]. 573 573 * LoRaWAN Downlink. Instruction for different platforms: See [[IoT LoRaWAN Server>>url:http://wiki.dragino.com/xwiki/bin/view/Main/]] section. 574 574 581 + 575 575 == 3.2 General Commands == 576 576 584 + 577 577 These commands are to configure: 578 578 579 579 * General system settings like: uplink interval. ... ... @@ -584,9 +584,9 @@ 584 584 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]] 585 585 586 586 587 - 588 588 == 3.3 Commands special design for PS-LB == 589 589 597 + 590 590 These commands only valid for PS-LB, as below: 591 591 592 592 ... ... @@ -597,14 +597,14 @@ 597 597 598 598 (% style="color:blue" %)**AT Command: AT+TDC** 599 599 600 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:510px" %)601 -|=(% style="width: 1 56px;" %)**Command Example**|=(% style="width: 137px;" %)**Function**|=**Response**602 -|(% style="width:15 6px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((608 +(% border="1" cellspacing="4" style="width:510px" %) 609 +|=(% style="width: 160px; background-color: rgb(217, 226, 243); color: rgb(0, 112, 192);" %)**Command Example**|=(% style="width: 160px; background-color: rgb(217, 226, 243); color: rgb(0, 112, 192);" %)**Function**|=(% style="width: 190px;background-color:#D9E2F3;color:#0070C0" %)**Response** 610 +|(% style="background-color:#f2f2f2; width:157px" %)AT+TDC=?|(% style="background-color:#f2f2f2; width:166px" %)Show current transmit Interval|(% style="background-color:#f2f2f2" %)((( 603 603 30000 604 604 OK 605 605 the interval is 30000ms = 30s 606 606 ))) 607 -|(% style="width:15 6px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((615 +|(% style="background-color:#f2f2f2; width:157px" %)AT+TDC=60000|(% style="background-color:#f2f2f2; width:166px" %)Set Transmit Interval|(% style="background-color:#f2f2f2" %)((( 608 608 OK 609 609 Set transmit interval to 60000ms = 60 seconds 610 610 ))) ... ... @@ -618,6 +618,7 @@ 618 618 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds 619 619 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds 620 620 629 + 621 621 === 3.3.2 Set Interrupt Mode === 622 622 623 623 ... ... @@ -625,20 +625,20 @@ 625 625 626 626 (% style="color:blue" %)**AT Command: AT+INTMOD** 627 627 628 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:510px" %)629 -|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 196px;" %)**Function**|=(% style="width: 157px;" %)**Response** 630 -|(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)((( 637 +(% border="1" cellspacing="4" style="width:510px" %) 638 +|=(% style="width: 154px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 196px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 157px;background-color:#D9E2F3;color:#0070C0" %)**Response** 639 +|(% style="background-color:#f2f2f2; width:154px" %)AT+INTMOD=?|(% style="background-color:#f2f2f2; width:196px" %)Show current interrupt mode|(% style="background-color:#f2f2f2; width:157px" %)((( 631 631 0 632 632 OK 633 633 the mode is 0 =Disable Interrupt 634 634 ))) 635 -|(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)((( 644 +|(% style="background-color:#f2f2f2; width:154px" %)AT+INTMOD=2|(% style="background-color:#f2f2f2; width:196px" %)((( 636 636 Set Transmit Interval 637 637 0. (Disable Interrupt), 638 638 ~1. (Trigger by rising and falling edge) 639 639 2. (Trigger by falling edge) 640 640 3. (Trigger by rising edge) 641 -)))|(% style="width:157px" %)OK 650 +)))|(% style="background-color:#f2f2f2; width:157px" %)OK 642 642 643 643 (% style="color:blue" %)**Downlink Command: 0x06** 644 644 ... ... @@ -649,6 +649,7 @@ 649 649 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode 650 650 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger 651 651 661 + 652 652 === 3.3.3 Set the output time === 653 653 654 654 ... ... @@ -656,52 +656,52 @@ 656 656 657 657 (% style="color:blue" %)**AT Command: AT+3V3T** 658 658 659 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:474px" %)660 -|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 201px;" %)**Function**|=(% style="width: 116px;" %)**Response** 661 -|(% style="width:154px" %)AT+3V3T=?|(% style="width:201px" %)Show 3V3 open time.|(% style="width:116px" %)((( 669 +(% border="1" cellspacing="4" style="width:474px" %) 670 +|=(% style="width: 154px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 201px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 116px;background-color:#D9E2F3;color:#0070C0" %)**Response** 671 +|(% style="background-color:#f2f2f2; width:154px" %)AT+3V3T=?|(% style="background-color:#f2f2f2; width:201px" %)Show 3V3 open time.|(% style="background-color:#f2f2f2; width:116px" %)((( 662 662 0 663 663 OK 664 664 ))) 665 -|(% style="width:154px" %)AT+3V3T=0|(% style="width:201px" %)Normally open 3V3 power supply.|(% style="width:116px" %)((( 675 +|(% style="background-color:#f2f2f2; width:154px" %)AT+3V3T=0|(% style="background-color:#f2f2f2; width:201px" %)Normally open 3V3 power supply.|(% style="background-color:#f2f2f2; width:116px" %)((( 666 666 OK 667 667 default setting 668 668 ))) 669 -|(% style="width:154px" %)AT+3V3T=1000|(% style="width:201px" %)Close after a delay of 1000 milliseconds.|(% style="width:116px" %)((( 679 +|(% style="background-color:#f2f2f2; width:154px" %)AT+3V3T=1000|(% style="background-color:#f2f2f2; width:201px" %)Close after a delay of 1000 milliseconds.|(% style="background-color:#f2f2f2; width:116px" %)((( 670 670 OK 671 671 ))) 672 -|(% style="width:154px" %)AT+3V3T=65535|(% style="width:201px" %)Normally closed 3V3 power supply.|(% style="width:116px" %)((( 682 +|(% style="background-color:#f2f2f2; width:154px" %)AT+3V3T=65535|(% style="background-color:#f2f2f2; width:201px" %)Normally closed 3V3 power supply.|(% style="background-color:#f2f2f2; width:116px" %)((( 673 673 OK 674 674 ))) 675 675 676 676 (% style="color:blue" %)**AT Command: AT+5VT** 677 677 678 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:470px" %)679 -|=(% style="width: 155px;" %)**Command Example**|=(% style="width: 196px;" %)**Function**|=(% style="width: 114px;" %)**Response** 680 -|(% style="width:155px" %)AT+5VT=?|(% style="width:196px" %)Show 5V open time.|(% style="width:114px" %)((( 688 +(% border="1" cellspacing="4" style="width:470px" %) 689 +|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 196px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 114px;background-color:#D9E2F3;color:#0070C0" %)**Response** 690 +|(% style="background-color:#f2f2f2; width:155px" %)AT+5VT=?|(% style="background-color:#f2f2f2; width:196px" %)Show 5V open time.|(% style="background-color:#f2f2f2; width:114px" %)((( 681 681 0 682 682 OK 683 683 ))) 684 -|(% style="width:155px" %)AT+5VT=0|(% style="width:196px" %)Normally closed 5V power supply.|(% style="width:114px" %)((( 694 +|(% style="background-color:#f2f2f2; width:155px" %)AT+5VT=0|(% style="background-color:#f2f2f2; width:196px" %)Normally closed 5V power supply.|(% style="background-color:#f2f2f2; width:114px" %)((( 685 685 OK 686 686 default setting 687 687 ))) 688 -|(% style="width:155px" %)AT+5VT=1000|(% style="width:196px" %)Close after a delay of 1000 milliseconds.|(% style="width:114px" %)((( 698 +|(% style="background-color:#f2f2f2; width:155px" %)AT+5VT=1000|(% style="background-color:#f2f2f2; width:196px" %)Close after a delay of 1000 milliseconds.|(% style="background-color:#f2f2f2; width:114px" %)((( 689 689 OK 690 690 ))) 691 -|(% style="width:155px" %)AT+5VT=65535|(% style="width:196px" %)Normally open 5V power supply.|(% style="width:114px" %)((( 701 +|(% style="background-color:#f2f2f2; width:155px" %)AT+5VT=65535|(% style="background-color:#f2f2f2; width:196px" %)Normally open 5V power supply.|(% style="background-color:#f2f2f2; width:114px" %)((( 692 692 OK 693 693 ))) 694 694 695 695 (% style="color:blue" %)**AT Command: AT+12VT** 696 696 697 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:443px" %)698 -|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 199px;" %)**Function**|=(% style="width: 83px;" %)**Response** 699 -|(% style="width:156px" %)AT+12VT=?|(% style="width:199px" %)Show 12V open time.|(% style="width:83px" %)((( 707 +(% border="1" cellspacing="4" style="width:443px" %) 708 +|=(% style="width: 156px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 199px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 83px;background-color:#D9E2F3;color:#0070C0" %)**Response** 709 +|(% style="background-color:#f2f2f2; width:156px" %)AT+12VT=?|(% style="background-color:#f2f2f2; width:199px" %)Show 12V open time.|(% style="background-color:#f2f2f2; width:83px" %)((( 700 700 0 701 701 OK 702 702 ))) 703 -|(% style="width:156px" %)AT+12VT=0|(% style="width:199px" %)Normally closed 12V power supply.|(% style="width:83px" %)OK 704 -|(% style="width:156px" %)AT+12VT=500|(% style="width:199px" %)Close after a delay of 500 milliseconds.|(% style="width:83px" %)((( 713 +|(% style="background-color:#f2f2f2; width:156px" %)AT+12VT=0|(% style="background-color:#f2f2f2; width:199px" %)Normally closed 12V power supply.|(% style="background-color:#f2f2f2; width:83px" %)OK 714 +|(% style="background-color:#f2f2f2; width:156px" %)AT+12VT=500|(% style="background-color:#f2f2f2; width:199px" %)Close after a delay of 500 milliseconds.|(% style="background-color:#f2f2f2; width:83px" %)((( 705 705 OK 706 706 ))) 707 707 ... ... @@ -718,6 +718,7 @@ 718 718 * Example 5: Downlink Payload: 070301F4 **~-~-->** AT+12VT=500 719 719 * Example 6: Downlink Payload: 07030000 **~-~-->** AT+12VT=0 720 720 731 + 721 721 === 3.3.4 Set the Probe Model === 722 722 723 723 ... ... @@ -735,18 +735,18 @@ 735 735 736 736 (A->01,B->02,C->03,D->04,E->05,F->06,G->07,H->08,I->09,J->0A,K->0B,L->0C) 737 737 738 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:510px" %)739 -|**Command Example**|**Function**|**Response** 740 -|AT +PROBE =?|Get or Set the probe model.|0 749 +(% border="1" cellspacing="4" style="width:510px" %) 750 +|(% style="background-color:#d9e2f3; color:#0070c0; width:154px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:269px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Response** 751 +|(% style="background-color:#f2f2f2; width:154px" %)AT +PROBE =?|(% style="background-color:#f2f2f2; width:269px" %)Get or Set the probe model.|(% style="background-color:#f2f2f2" %)0 741 741 OK 742 -|AT +PROBE =0003|Set water depth sensor mode, 3m type.|OK 743 -|((( 753 +|(% style="background-color:#f2f2f2; width:154px" %)AT +PROBE =0003|(% style="background-color:#f2f2f2; width:269px" %)Set water depth sensor mode, 3m type.|(% style="background-color:#f2f2f2" %)OK 754 +|(% style="background-color:#f2f2f2; width:154px" %)((( 744 744 AT +PROBE =000A 745 745 746 746 747 -)))|Set water depth sensor mode, 10m type.|OK 748 -|AT +PROBE =0101|Set pressure transmitters mode, first type(A).|OK 749 -|AT +PROBE =0000|Initial state, no settings.|OK 758 +)))|(% style="background-color:#f2f2f2; width:269px" %)Set water depth sensor mode, 10m type.|(% style="background-color:#f2f2f2" %)OK 759 +|(% style="background-color:#f2f2f2; width:154px" %)AT +PROBE =0101|(% style="background-color:#f2f2f2; width:269px" %)Set pressure transmitters mode, first type(A).|(% style="background-color:#f2f2f2" %)OK 760 +|(% style="background-color:#f2f2f2; width:154px" %)AT +PROBE =0000|(% style="background-color:#f2f2f2; width:269px" %)Initial state, no settings.|(% style="background-color:#f2f2f2" %)OK 750 750 751 751 **Downlink Command: 0x08** 752 752 ... ... @@ -755,6 +755,7 @@ 755 755 * Example 1: Downlink Payload: 080003 **~-~-->** AT+PROBE=0003 756 756 * Example 2: Downlink Payload: 080101 **~-~-->** AT+PROBE=0101 757 757 769 + 758 758 === 3.3.5 Multiple collections are one uplink(Since firmware V1.1) === 759 759 760 760 ... ... @@ -770,20 +770,20 @@ 770 770 (% style="color:#037691" %)**bb:**(%%) Each collection interval (s), the value is 1~~65535 771 771 (% style="color:#037691" %)**cc:**(%%)** **the number of collection times, the value is 1~~120 772 772 773 -(% border="1" cellspacing="4" style=" background-color:#f7faff; color:black;width:510px" %)774 -|**Command Example**|**Function**|**Response** 775 -|AT+STDC=?|Get the mode of multiple acquisitions and one uplink.|1,10,18 785 +(% border="1" cellspacing="4" style="width:510px" %) 786 +|(% style="background-color:#d9e2f3; color:#0070c0; width:160px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:215px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Response** 787 +|(% style="background-color:#f2f2f2; width:160px" %)AT+STDC=?|(% style="background-color:#f2f2f2; width:215px" %)Get the mode of multiple acquisitions and one uplink.|(% style="background-color:#f2f2f2" %)1,10,18 776 776 OK 777 -|AT+STDC=1,10,18|Set the mode of multiple acquisitions and one uplink, collect once every 10 seconds, and report after 18 times.|((( 789 +|(% style="background-color:#f2f2f2; width:160px" %)AT+STDC=1,10,18|(% style="background-color:#f2f2f2; width:215px" %)Set the mode of multiple acquisitions and one uplink, collect once every 10 seconds, and report after 18 times.|(% style="background-color:#f2f2f2" %)((( 778 778 Attention:Take effect after ATZ 779 779 780 780 OK 781 781 ))) 782 -|AT+STDC=0, 0,0|((( 794 +|(% style="background-color:#f2f2f2; width:160px" %)AT+STDC=0, 0,0|(% style="background-color:#f2f2f2; width:215px" %)((( 783 783 Use the TDC interval to send packets.(default) 784 784 785 785 786 -)))|((( 798 +)))|(% style="background-color:#f2f2f2" %)((( 787 787 Attention:Take effect after ATZ 788 788 789 789 OK ... ... @@ -795,11 +795,13 @@ 795 795 796 796 * Example 1: Downlink Payload: AE 01 02 58 12** ~-~-->** AT+STDC=1,600,18 797 797 810 + 798 798 = 4. Battery & Power Consumption = 799 799 813 + 800 800 PS-LB-NA uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace. 801 801 802 - 816 +[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] . 803 803 804 804 805 805 = 5. OTA firmware update = ... ... @@ -849,6 +849,7 @@ 849 849 * Package Size / pcs : cm 850 850 * Weight / pcs : g 851 851 866 + 852 852 = 9. Support = 853 853 854 854