Changes for page NMDS200 - NB-IoT Microwave Radar Distance Sensor User Manual
Last modified by Mengting Qiu on 2024/04/02 17:03
Summary
-
Page properties (1 modified, 0 added, 0 removed)
-
Attachments (0 modified, 0 added, 2 removed)
Details
- Page properties
-
- Content
-
... ... @@ -16,6 +16,7 @@ 16 16 ((( 17 17 The Dragino NMDS200 is a(% style="color:blue" %)** NB-IoT Microwave Radar distance sensor**(%%). It uses (% style="color:blue" %)**24Ghz Microwave**(%%) to detect the distance between sensor and different objects. Compare vs ultrasonic or Lidar measurement method, Microwave Radar is (% style="color:blue" %)**more reliable for condensation / dusty environment**(%%). It can sense correct distance even there is water or thick dust on top of the sensor. 18 18 19 + 19 19 The NMDS200 can be applied to scenarios such as horizontal distance measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, etc. 20 20 21 21 NMDS200 can (% style="color:blue" %)**measure two distances**(%%): the closest object and next object behind the closest one. ... ... @@ -32,6 +32,7 @@ 32 32 ))) 33 33 34 34 36 + 35 35 == 1.2 Features == 36 36 37 37 ... ... @@ -49,6 +49,7 @@ 49 49 * Micro SIM card slot for NB-IoT SIM 50 50 * 8500mAh Battery for long-term use 51 51 54 + 52 52 == 1.3 Radar probe specification == 53 53 54 54 ... ... @@ -61,6 +61,8 @@ 61 61 * Horizontal Angel: 78° 62 62 * Vertical Angel: 23° 63 63 67 + 68 + 64 64 == 1.4 Storage Temperature == 65 65 66 66 ... ... @@ -67,9 +67,13 @@ 67 67 -40°C to +85°C 68 68 69 69 75 + 76 + 77 + 70 70 == 1.5 Applications == 71 71 72 72 81 + 73 73 * Horizontal distance measurement 74 74 * Liquid level measurement 75 75 * Parking management system ... ... @@ -80,6 +80,7 @@ 80 80 * Sewer 81 81 * Bottom water level monitoring 82 82 92 + 83 83 == 1.6 Specification == 84 84 85 85 ... ... @@ -97,6 +97,7 @@ 97 97 * B20 @H-FDD: 800MHz 98 98 * B28 @H-FDD: 700MHz 99 99 110 + 100 100 == 1.7 Installation == 101 101 102 102 ... ... @@ -136,7 +136,7 @@ 136 136 137 137 Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8. The NMDS200 will use** (% style="color:red" %)CoAP(120.24.4.116:5683)(%%)** or raw (% style="color:red" %)**UDP(120.24.4.116:5601) **(%%)or (% style="color:red" %)**MQTT(120.24.4.116:1883) **(%%)or (% style="color:red" %)**TCP(120.24.4.116:5600)protocol**(%%) to send data to the test server. 138 138 139 -[[image:image-2022120 8090742-1.png]]150 +[[image:image-20221207173300-4.png]] 140 140 141 141 142 142 === 2.2.1 Insert NB-IoT SIM card === ... ... @@ -192,7 +192,7 @@ 192 192 (% style="color:red" %)**Note: if you don't have a CoAP server, you can refer this link to set up a CoAP server: **(%%)[[**http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]] 193 193 194 194 195 -(% style="color:blue" %)**Use below commands in N MDS200:**206 +(% style="color:blue" %)**Use below commands in NDS03A:** 196 196 197 197 * (% style="color:#037691" %)**AT+PRO=1** (%%) ~/~/ Set to use CoAP protocol to uplink 198 198 ... ... @@ -295,13 +295,13 @@ 295 295 296 296 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %) 297 297 |=(% scope="row" style="width: 50px;" %)**Size(bytes)**|(% style="width:50px" %)**8**|(% style="width:20px" %)**2**|(% style="width:20px" %)**2**|(% style="width:65px" %)**1**|(% style="width:25px" %)**1**|(% style="width:50px" %)**1**|(% style="width:90px" %)**2**|(% style="width:100px" %)**2** 298 -|=(% style="width: 93px;" %)**Value**|(% style="width:67px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:40px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:45px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:54px" %)MOD|(% style="width:62px" %)Exit flag|(% style="width:94px" %) [[Distance 1>>||anchor="H2.4.5A0A0Distance"]]|(% style="width:93px" %)[[Distance 2>>||anchor="H2.4.5A0A0Distance"]]309 +|=(% style="width: 93px;" %)**Value**|(% style="width:67px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:40px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:45px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:54px" %)MOD|(% style="width:62px" %)Exit flag|(% style="width:94px" %) Distance 1 |(% style="width:93px" %) Distance 2 299 299 300 300 (% border="1.5" style="background-color:#ffffcc; color:green; width:450px" %) 301 301 |(% style="width:50px" %)**4**|(% style="width:90px" %)**2**|(% style="width:90px" %)**2**|(% style="width:60px" %)**4**|(% style="width:50px" %)((( 302 302 **1-32 group** 303 303 ))) 304 -|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4. 6A0Timestamp"]]| Distance 1 | Distance 2|(% style="width:67px" %)Time stamp|(% style="width:74px" %)...315 +|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.7A0Timestamp"]]| Distance 1 | Distance 2|(% style="width:67px" %)Time stamp|(% style="width:74px" %)... 305 305 306 306 If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NMDS200 uplink data. 307 307 ... ... @@ -334,7 +334,6 @@ 334 334 335 335 336 336 337 - 338 338 == 2.4 Payload Explanation and Sensor Interface == 339 339 340 340 === 2.4.1 Device ID === ... ... @@ -356,13 +356,13 @@ 356 356 357 357 Specify the software version: 0x64=100, which means firmware version 1.00. 358 358 359 -For example 0x00 64 : This device is N MDS2001 with firmware version 1.0.0.369 +For example 0x00 64 : This device is NDS03A 1 with firmware version 1.0.0. 360 360 361 361 362 362 === 2.4.3 Battery Info === 363 363 364 364 365 -Check the battery voltage for N MDS200.375 +Check the battery voltage for NDS03A. 366 366 367 367 Ex1: 0x0B45 = 2885mV 368 368 ... ... @@ -374,49 +374,51 @@ 374 374 375 375 NB-IoT Network signal Strength. 376 376 377 -** (% style="color:blue" %)Ex1: 0x1d = 29**387 +**Ex1: 0x1d = 29** 378 378 379 -** (% style="color:#037691" %)0**(%%)-113dBm or less389 +**0** -113dBm or less 380 380 381 -** (% style="color:#037691" %)1**(%%)-111dBm391 +**1** -111dBm 382 382 383 -** (% style="color:#037691" %)2...30**(%%)-109dBm... -53dBm393 +**2...30** -109dBm... -53dBm 384 384 385 -** (% style="color:#037691" %)31**(%%)-51dBm or greater395 +**31** -51dBm or greater 386 386 387 -** (% style="color:#037691" %)99**(%%)Not known or not detectable397 +**99** Not known or not detectable 388 388 389 389 390 -=== 2.4.5 Dis tance ===400 +=== 2.4.5 Disalarm: (default: 0) === 391 391 392 392 393 - [[image:1670407401682-959.png]]403 +(% style="color:blue" %)**If Disalarm = 1**(%%), NDS03A will only send uplink at every TDC periodically. This is normally use for pulse meter application, in this application, there are many open/close event, and platform only care about the total number of pulse. 394 394 405 +(% style="color:blue" %)**If Disalarm = 0**(%%), NDS03A will send uplink at every TDC periodically and send data on each open/close event. This is useful for the application user need to monitor the open/close event in real-time. 395 395 396 -(% style="color: blue" %)**Object1Distance:**407 + (% style="color:red" %)**Note:**(%%) When Disalarm=0, a high frequently open/close event will cause lots of uplink and drain battery very fast. 397 397 398 -Distance between sensor probe to the first object. (unit: cm) 399 399 400 - Forexample,ifthe data youget from the registeris0x02 0x05, thedistancebetween the sensor and themeasuredobject is410 +=== 2.4.6 Keep Status & Keep Time === 401 401 402 -(% style="color:blue" %)**0205(H) = 517 (D) = 517 cm.** 403 403 413 +Shows the configure value of Alarm Base on Timeout Feature 404 404 405 -(% style="color:blue" %)**Object2 Distance:** 406 406 407 - Distancebetweensensor probeto the second object. (unit: cm)416 +=== 2.4.7 Timestamp === 408 408 409 409 410 - === 2.4.6Timestamp ===419 +Timestamp : 0x6315537b =1662342011 411 411 412 412 413 - Timestamp:0x6315537b=1662342011422 +=== 2.4.8 Switch Dual Channel Mode === 414 414 415 415 425 +NDS03A can connect two door sensors. Another door sensor can be connected to PB15 pin. Both channels support alarm function. 426 + 427 + 416 416 == 2.5 Downlink Payload == 417 417 418 418 419 -By default, N MDS200prints the downlink payload to console port.431 +By default, NDS03A prints the downlink payload to console port. 420 420 421 421 [[image:image-20221021111414-18.png]] 422 422 ... ... @@ -433,7 +433,7 @@ 433 433 434 434 * (% style="color:#037691" %)**Reset** 435 435 436 -If payload = 0x04FF, it will reset the N MDS200448 +If payload = 0x04FF, it will reset the NDS03A 437 437 438 438 * (% style="color:#037691" %)**INTMOD** 439 439 ... ... @@ -443,37 +443,112 @@ 443 443 == 2.6 LED Indicator == 444 444 445 445 446 -The N MDS200has an internal LED which is to show the status of different states.458 +The NDS03A has an internal LED which is to show the status of different states. 447 447 448 448 * When the device starts normally, the LED will light up for 1 second. 449 -* After N MDS200join NB-IoT network. The LED will be ON for 3 seconds.461 +* After NDS03A join NB-IoT network. The LED will be ON for 3 seconds. 450 450 * For each uplink probe, LED will be on for 500ms. 451 451 464 +== 2.7 Alarm Base on Timeout == 452 452 453 453 467 +NDS03A can monitor the timeout for a status change, this feature can be used to monitor some events such as door opening too long etc. Related Parameters are: 454 454 455 -== 2.7 Distance alarm function == 456 456 470 +(% style="color:blue" %)**1. Keep Status: Status to be monitor** 457 457 458 - (%style="color:blue"%)**AT Command:AT+ALARM1=min,max**472 +Keep Status = 1: Monitor Close to Open event 459 459 460 - **(%style="color:blue"%)Example1:**474 +Keep Status = 0: Monitor Open to Close event 461 461 462 -AT+ ALARM1 =60,200 ~/~/ Alarm when moisture lower than 60. 463 463 464 - AT+ALARM2=min,max477 +(% style="color:blue" %)**2. Keep Time: Timeout to send an Alarm** 465 465 479 +Range 0 ~~ 65535(0xFFFF) seconds. 466 466 467 - **(%style="color:blue"%)Example2:**481 +If keep time = 0, Disable Alarm Base on Timeout feature. 468 468 469 - AT+ALARM2=200,1500~/~/Alarm when temperaturelowerthan1500483 +If keep time > 0, device will monitor the keep status event and send an alarm when status doesn't change after timeout. 470 470 471 471 486 +(% style="color:blue" %)**AT Command to configure:** 472 472 488 +(% style="color:blue" %)**PB14 PIN:** 473 473 474 -== 2.8Setthenumber ofdata tobe uploadeddtherecordingtime==490 +(% style="color:#037691" %)**AT+TTRIG=1,30** (%%) **~-~->** When the **Keep Status** change from connected to disconnect, and device remains in disconnect status for more than 30 seconds. NDS03A will send an uplink packet, the [[Alarm bit>>url:http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/CPL01%20LoRaWAN%20Outdoor%20PulseContact%20%20Sensor%20Manual/#H2.3.3Real-TimeOpen2FCloseStatus2CUplinkFPORT3D2]] (the second bit of 1^^st^^ byte of payload) on this uplink packet is set to 1. 475 475 492 +(% style="color:#037691" %)**AT+TTRIG=0,0 ** (%%) **~-~->** Default Value, disable timeout Alarm. 476 476 494 + 495 +(% style="color:blue" %)**PB15 PIN:** 496 + 497 +(% style="color:#037691" %)**AT+TTRIG2=1,30** 498 + 499 +(% style="color:#037691" %)**AT+TTRIG2=0,0 ** 500 + 501 + 502 +== 2.8 Set debug mode == 503 + 504 + 505 +Feature: Enable or Disable debug mode 506 + 507 +(% style="color:blue" %)**AT Command: AT+DEBUG** 508 + 509 +[[image:image-20221021111629-21.png]] 510 + 511 + 512 + 513 +== 2.9 Clear Flash Record == 514 + 515 + 516 +Feature: Clear flash storage for data log feature. 517 + 518 +(% style="color:blue" %)**AT Command: AT+CLRDTA** 519 + 520 +[[image:image-20221021111527-19.png]] 521 + 522 + 523 +== 2.10 Count Mod == 524 + 525 + 526 +(% style="color:blue" %)**AT Command: AT+COUNTMOD** 527 + 528 +[[image:image-20221118092935-1.png]] 529 + 530 + 531 +== 2.11 Interrupt Pin Channel Mod == 532 + 533 + 534 +(% style="color:blue" %)**AT Command: AT+TTRCHANNEL** 535 + 536 +[[image:image-20221118093144-2.png]] 537 + 538 + 539 +== 2.12 TTRIG1/2 timeout status alarm == 540 + 541 + 542 +It needs to be used with AT+TTRIG1 or AT+TTRIG2. When TTRIG1 or TTRIG2 times out and causes an alarm, and the status does not change subsequently, an alarm packet will be sent at the alarm interval. 543 + 544 +(% style="color:blue" %)**AT Command: AT+TTRALARM** 545 + 546 +[[image:image-20221118093512-3.png]] 547 + 548 + 549 +== 2.13 Select counting mode == 550 + 551 + 552 +(% style="color:blue" %)**AT Command: AT+TTRMODx=a,b** 553 + 554 +When (% style="color:red" %)**a=0**(%%), the door is opened to count, and when (% style="color:red" %)**a=1**(%%),the closed door is counted. 555 + 556 +When (% style="color:red" %)**b=0**(%%), it is the last door open duration, and when (% style="color:red" %)**b=1**(%%),the last door close duration. 557 + 558 +[[image:image-20221118093658-4.png]] 559 + 560 + 561 +== 2.14 Set the number of data to be uploaded and the recording time == 562 + 563 + 477 477 (% style="color:blue" %)**AT Command:** 478 478 479 479 (% style="color:#037691" %)**AT+TR=900**(%%) ~/~/ The unit is seconds, and the default is to record data once every 900 seconds.( The minimum can be set to 180 seconds) ... ... @@ -481,7 +481,7 @@ 481 481 (% style="color:#037691" %)**AT+NOUD=8**(%%)** ** ~/~/ The device uploads 0 sets of recorded data by default. Up to 32 sets of record data can be uploaded. 482 482 483 483 484 -== 2. 9Read or Clear cached data ==571 +== 2.15 Read or Clear cached data == 485 485 486 486 487 487 (% style="color:blue" %)**AT Command:** ... ... @@ -490,10 +490,10 @@ 490 490 491 491 (% style="color:#037691" %)**AT+CDP=0** (%%) ~/~/ Clear cached data 492 492 493 -[[image:1 670408172929-569.png]]580 +[[image:image-20221118094227-5.png]] 494 494 495 495 496 -== 2.1 0Firmware Change Log ==583 +== 2.16 Firmware Change Log == 497 497 498 498 499 499 Download URL & Firmware Change log: [[https:~~/~~/www.dropbox.com/sh/hacq385w6qgnonr/AAC3D79GFGF1JdZUIzNegn2Ha?dl=0>>https://www.dropbox.com/sh/hacq385w6qgnonr/AAC3D79GFGF1JdZUIzNegn2Ha?dl=0]] ... ... @@ -501,12 +501,12 @@ 501 501 Upgrade Instruction: [[Upgrade Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]] 502 502 503 503 504 -== 2.1 1Battery Analysis ==591 +== 2.17 Battery Analysis == 505 505 506 -=== 2.1 1.1 Battery Type ===593 +=== 2.17.1 Battery Type === 507 507 508 508 509 -The N MDS200battery is a combination of an 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.596 +The NDS03A battery is a combination of an 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. 510 510 511 511 The battery is designed to last for several years depends on the actual use environment and update interval. 512 512 ... ... @@ -521,7 +521,7 @@ 521 521 [[image:image-20221021111911-26.png]] 522 522 523 523 524 -=== 2.1 1.2 Power consumption Analyze ===611 +=== 2.17.2 Power consumption Analyze === 525 525 526 526 527 527 Dragino battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval. ... ... @@ -543,16 +543,16 @@ 543 543 [[image:1666596205057-567.png]] 544 544 545 545 546 -=== 2.1 1.3 Battery Note ===633 +=== 2.17.3 Battery Note === 547 547 548 548 549 549 The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased. 550 550 551 551 552 -=== 2.1 1.4 Replace the battery ===639 +=== 2.17.4 Replace the battery === 553 553 554 554 555 -The default battery pack of N MDS200includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).642 +The default battery pack of NDS03A includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes). 556 556 557 557 558 558 = 3. Access NB-IoT Module = ... ... @@ -606,51 +606,57 @@ 606 606 607 607 AT+SERVADDR : Server Address 608 608 609 -AT+TR : Get or Set record time 696 +AT+TR : Get or Set record time 610 610 611 -AT+NOUD : 698 +AT+NOUD : Get or Set the number of data to be uploaded 612 612 613 613 AT+CDP : Read or Clear cached data 614 614 615 -AT+DEBUG :Enable or Disable debug mode702 +AT+ DEBUG : Enable or Disable debug mode 616 616 617 -AT+ ALARM1:Get or Setalarm ofdistance1704 +AT+ TTRIG1 : Get or Set PB14 PIN Alarm Base on Timeout 618 618 619 -AT+ ALARM2:Get or Setalarm ofdistance2706 +AT+ TTRIG2 : Get or Set PB15 PIN Alarm Base on Timeout 620 620 621 -AT+ GETSENSORVALUE:Returnsthe currentsensormeasurement708 +AT+COUNTMOD : Get or Set the count mode 622 622 623 -AT+ POWERIC :set thePowerICflag710 +AT+TTRCHANNEL : Get or Set the number of interrupt channels 624 624 712 +AT+TTRALARM : Get or Set TTRIG1 of Alarm interval (unit: minute) 625 625 714 +AT+DISALARM : Enable/Disable Alarm for door open/close or water leak event 715 + 716 +AT+ CLRC : Clear current door open count 717 + 718 + 626 626 (% style="color:blue" %)**COAP Management** 627 627 628 -AT+URI : 721 +AT+URI : Resource parameters 629 629 630 630 631 631 (% style="color:blue" %)**UDP Management** 632 632 633 -AT+CFM : 726 +AT+CFM : Upload confirmation mode (only valid for UDP) 634 634 635 635 636 636 (% style="color:blue" %)**MQTT Management** 637 637 638 -AT+CLIENT : Get or Set MQTT client 731 +AT+CLIENT : Get or Set MQTT client 639 639 640 -AT+UNAME : Get or Set MQTT Username 733 +AT+UNAME : Get or Set MQTT Username 641 641 642 -AT+PWD : 735 +AT+PWD : Get or Set MQTT password 643 643 644 -AT+PUBTOPIC :Get or Set MQTT publish topic737 +AT+PUBTOPIC : Get or Set MQTT publish topic 645 645 646 -AT+SUBTOPIC :Get or Set MQTT subscription topic739 +AT+SUBTOPIC : Get or Set MQTT subscription topic 647 647 648 648 649 649 (% style="color:blue" %)**Information** 650 650 651 -AT+FDR :Factory Data Reset744 +AT+FDR : Factory Data Reset 652 652 653 -AT+PWORD :Serial Access Password746 +AT+PWORD : Serial Access Password 654 654 655 655 656 656 = 5. FAQ = ... ... @@ -662,7 +662,7 @@ 662 662 663 663 Please see this link for how to upgrade: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList]] 664 664 665 -(% style="color:red" %)**Notice: **(% style="color:blue" %)**N MDS200** (%%)**and (% style="color:blue" %)LMDS200(%%)**(% style="color:blue" %) (%%)**share the same mother board. They use the same connection and method to update.**758 +(% style="color:red" %)**Notice: **(% style="color:blue" %)**NDS03A** (%%)**and (% style="color:blue" %)LDS03A(%%)**(% style="color:blue" %) (%%)**share the same mother board. They use the same connection and method to update.** 666 666 667 667 668 668 = 6. Trouble Shooting = ... ... @@ -682,7 +682,7 @@ 682 682 = 7. Order Info = 683 683 684 684 685 -Part Number :**(% style="color:blue" %)NMDS200**778 +Part Number**:** NDS03A 686 686 687 687 688 688 = 8. Packing Info = ... ... @@ -690,7 +690,7 @@ 690 690 691 691 (% style="color:blue" %)**Package Includes**: 692 692 693 -* N MDS200NB-IoT MicrowaveRadarDistanceSensor x 1786 +* NDS03A Open/Close Door Sensor x 1 694 694 695 695 = 9. Support = 696 696
- 1670408172929-569.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -211.8 KB - Content
- image-20221208090742-1.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -79.7 KB - Content