Changes for page LMDS200 -- LoRaWAN Microwave Radar Distance Sensor User Manual
Last modified by Mengting Qiu on 2025/08/06 17:02
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... ... @@ -100,6 +100,7 @@ 100 100 * IP66 Waterproof Enclosure 101 101 * 8500mAh Battery for long term use 102 102 103 + 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 +109,7 @@ 109 109 ** Pure non metal material: <10 mm 110 110 * Pure liquid without irregular deposition. 111 111 113 + 112 112 == 1.4 Mechanical == 113 113 114 114 [[image:image-20220615090910-1.png]] ... ... @@ -141,7 +141,6 @@ 141 141 [[image:image-20220615092044-12.png]] 142 142 143 143 144 - 145 145 (% style="color:blue" %)**Step3: **(%%)Test the installation point. 146 146 147 147 Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point. ... ... @@ -170,9 +170,9 @@ 170 170 (% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally. 171 171 172 172 173 - 174 174 (% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue. 175 175 176 + 176 176 Prepare Eproxy AB glue. 177 177 178 178 Put Eproxy AB glue in the sensor and press it hard on the container installation point. ... ... @@ -193,35 +193,35 @@ 193 193 194 194 195 195 196 -== 1. 6 Applications ==197 +== 1.5 Applications == 197 197 198 -* Smart liquid control solution. 199 -* Smart liquefied gas solution. 199 +* Horizontal distance measurement 200 +* Liquid level measurement 201 +* Parking management system 202 +* Object proximity and presence detection 203 +* Intelligent trash can management system 204 +* Robot obstacle avoidance 205 +* Automatic control 206 +* Sewer 207 +* Bottom water level monitoring 200 200 201 -== 1. 7Precautions==209 +== 1.6 Pin mapping and power on == 202 202 203 -* 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 -* 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 -* 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. 206 206 207 - == 1.8 Pinmappingand power on==212 +[[image:1654847583902-256.png]] 208 208 209 209 210 -[[image:1655257026882-201.png]] 211 211 216 += 2. Configure LDDS75 to connect to LoRaWAN network = 212 212 213 - 214 -= 2. Configure LDDS20 to connect to LoRaWAN network = 215 - 216 - 217 217 == 2.1 How it works == 218 218 219 219 ((( 220 -The LDDS 20is 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.221 +The LDDS75 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 ((( 224 -In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0 UsingtheATCommands"]]to set the keys in the LDDS20.225 +In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75. 225 225 ))) 226 226 227 227 ... ... @@ -233,7 +233,7 @@ 233 233 ))) 234 234 235 235 ((( 236 -[[image:165 5257698953-697.png]]237 +[[image:1654848616367-242.png]] 237 237 ))) 238 238 239 239 ((( ... ... @@ -243,11 +243,11 @@ 243 243 ((( 244 244 245 245 246 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS 20.247 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75. 247 247 ))) 248 248 249 249 ((( 250 -Each LDDS 20is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.251 +Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below. 251 251 ))) 252 252 253 253 [[image:image-20220607170145-1.jpeg]] ... ... @@ -277,7 +277,6 @@ 277 277 [[image:image-20220610161353-7.png]] 278 278 279 279 280 - 281 281 You can also choose to create the device manually. 282 282 283 283 [[image:image-20220610161538-8.png]] ... ... @@ -290,17 +290,16 @@ 290 290 291 291 292 292 293 -(% style="color:blue" %)**Step 2**(%%): 20293 +(% style="color:blue" %)**Step 2**(%%): Power on LDDS75 294 294 295 295 296 296 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position). 297 297 298 -[[image:image-2022061 5095102-14.png]]298 +[[image:image-20220610161724-10.png]] 299 299 300 300 301 - 302 302 ((( 303 -(% style="color:blue" %)**Step 3**(%%)**:** 20will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.302 +(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel. 304 304 ))) 305 305 306 306 [[image:1654849068701-275.png]] ... ... @@ -311,10 +311,12 @@ 311 311 312 312 ((( 313 313 ((( 314 -LDDS20 will uplink payload via LoRaWAN with below payload format: 313 +LDDS75 will uplink payload via LoRaWAN with below payload format: 314 +))) 315 315 316 -Uplink payload includes in total 8 bytes. 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). 316 +((( 317 +Uplink payload includes in total 4 bytes. 318 +Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance 318 318 ))) 319 319 ))) 320 320 ... ... @@ -341,7 +341,7 @@ 341 341 === 2.3.1 Battery Info === 342 342 343 343 344 -Check the battery voltage for LDDS 20.345 +Check the battery voltage for LDDS75. 345 345 346 346 Ex1: 0x0B45 = 2885mV 347 347 ... ... @@ -352,19 +352,20 @@ 352 352 === 2.3.2 Distance === 353 353 354 354 ((( 355 -Get the distance. Flat object range 20mm - 2000mm.356 +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 __0x060x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541(D) = 1541mm.**360 +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. 364 364 364 +* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor. 365 +* 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. 366 + 365 365 === 2.3.3 Interrupt Pin === 366 366 367 -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.369 +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. 368 368 369 369 **Example:** 370 370 ... ... @@ -410,91 +410,533 @@ 410 410 The payload decoder function for TTN V3 is here: 411 411 412 412 ((( 413 -LDDS 20TTN 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/]]415 +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/]] 414 414 ))) 415 415 416 416 417 417 418 -== 2.4 DownlinkPayload==420 +== 2.4 Uplink Interval == 419 419 420 - By default,LDDS20prints the downlink payloadtoconsoleport.422 +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"]] 421 421 422 -[[image:image-20220615100930-15.png]] 423 423 424 424 425 - **Examples:**426 +== 2.5 Show Data in DataCake IoT Server == 426 426 428 +((( 429 +[[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: 430 +))) 427 427 428 -* (% style="color:blue" %)**Set TDC** 432 +((( 433 + 434 +))) 429 429 430 -If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01. 436 +((( 437 +(% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.** 438 +))) 431 431 432 -Payload: 01 00 00 1E TDC=30S 440 +((( 441 +(% 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:** 442 +))) 433 433 434 -Payload: 01 00 00 3C TDC=60S 435 435 445 +[[image:1654592790040-760.png]] 436 436 437 -* (% style="color:blue" %)**Reset** 438 438 439 - If payload = 0x04FF,it will reset the LDDS20448 +[[image:1654592800389-571.png]] 440 440 441 441 442 - *(% style="color:blue" %)**CFM**451 +(% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.** 443 443 444 - DownlinkPayload:05000001,SetAT+CFM=1 or05000000,setAT+CFM=0453 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.** 445 445 455 +[[image:1654851029373-510.png]] 446 446 447 447 448 - ==2.5ShowData inDataCakeIoTServer==458 +After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake. 449 449 460 +[[image:image-20220610165129-11.png||height="595" width="1088"]] 461 + 462 + 463 + 464 +== 2.6 Frequency Plans == 465 + 450 450 ((( 451 - [[DATACAKE>>url:https://datacake.co/]]providesahuman friendlyinterfacetoshowthesensordata,oncewehave datainTTN, wecanuse[[DATACAKE>>url:https://datacake.co/]] to connectto TTNandsee thedata in DATACAKE.Belowarethesteps:467 +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. 452 452 ))) 453 453 470 + 471 + 472 +=== 2.6.1 EU863-870 (EU868) === 473 + 454 454 ((( 475 +(% style="color:blue" %)**Uplink:** 476 +))) 477 + 478 +((( 479 +868.1 - SF7BW125 to SF12BW125 480 +))) 481 + 482 +((( 483 +868.3 - SF7BW125 to SF12BW125 and SF7BW250 484 +))) 485 + 486 +((( 487 +868.5 - SF7BW125 to SF12BW125 488 +))) 489 + 490 +((( 491 +867.1 - SF7BW125 to SF12BW125 492 +))) 493 + 494 +((( 495 +867.3 - SF7BW125 to SF12BW125 496 +))) 497 + 498 +((( 499 +867.5 - SF7BW125 to SF12BW125 500 +))) 501 + 502 +((( 503 +867.7 - SF7BW125 to SF12BW125 504 +))) 505 + 506 +((( 507 +867.9 - SF7BW125 to SF12BW125 508 +))) 509 + 510 +((( 511 +868.8 - FSK 512 +))) 513 + 514 +((( 455 455 456 456 ))) 457 457 458 458 ((( 459 -(% style="color:blue" %)** Step 1**(%%)**: Be sure that your device is programmed and properly connected to the networkat this time.**519 +(% style="color:blue" %)**Downlink:** 460 460 ))) 461 461 462 462 ((( 463 - (% style="color:blue" %)**Step2**(%%)**: To configure the Applicationto forward data to DATACAKE you willneed to add integration. To add the DATACAKE integration, perform the followingsteps:**523 +Uplink channels 1-9 (RX1) 464 464 ))) 465 465 526 +((( 527 +869.525 - SF9BW125 (RX2 downlink only) 528 +))) 466 466 467 -[[image:1654592790040-760.png]] 468 468 469 469 470 - [[image:1654592800389-571.png]]532 +=== 2.6.2 US902-928(US915) === 471 471 534 +((( 535 +Used in USA, Canada and South America. Default use CHE=2 472 472 473 -(% style="color:blue" %)** Step3**(%%)**: Create an account orloginDatacake.**537 +(% style="color:blue" %)**Uplink:** 474 474 475 - (%style="color:blue"%)**Step 4**(%%)**: Search the LDDS75and add DevEUI.(% style="color:red"%)(Note: LDDS20use same payload as LDDS75)(%%)**539 +903.9 - SF7BW125 to SF10BW125 476 476 477 - [[image:1654851029373-510.png]]541 +904.1 - SF7BW125 to SF10BW125 478 478 543 +904.3 - SF7BW125 to SF10BW125 479 479 480 - Afteradded,thesensor data arrive TTN V3, it will alsoarrive and show in Datacake.545 +904.5 - SF7BW125 to SF10BW125 481 481 482 - [[image:image-20220610165129-11.png||height="595"width="1088"]]547 +904.7 - SF7BW125 to SF10BW125 483 483 549 +904.9 - SF7BW125 to SF10BW125 484 484 551 +905.1 - SF7BW125 to SF10BW125 485 485 486 - == 2.6LEDIndicator==553 +905.3 - SF7BW125 to SF10BW125 487 487 488 -The LDDS20 has an internal LED which is to show the status of different state. 489 489 556 +(% style="color:blue" %)**Downlink:** 490 490 558 +923.3 - SF7BW500 to SF12BW500 559 + 560 +923.9 - SF7BW500 to SF12BW500 561 + 562 +924.5 - SF7BW500 to SF12BW500 563 + 564 +925.1 - SF7BW500 to SF12BW500 565 + 566 +925.7 - SF7BW500 to SF12BW500 567 + 568 +926.3 - SF7BW500 to SF12BW500 569 + 570 +926.9 - SF7BW500 to SF12BW500 571 + 572 +927.5 - SF7BW500 to SF12BW500 573 + 574 +923.3 - SF12BW500(RX2 downlink only) 575 + 576 + 577 + 578 +))) 579 + 580 +=== 2.6.3 CN470-510 (CN470) === 581 + 582 +((( 583 +Used in China, Default use CHE=1 584 +))) 585 + 586 +((( 587 +(% style="color:blue" %)**Uplink:** 588 +))) 589 + 590 +((( 591 +486.3 - SF7BW125 to SF12BW125 592 +))) 593 + 594 +((( 595 +486.5 - SF7BW125 to SF12BW125 596 +))) 597 + 598 +((( 599 +486.7 - SF7BW125 to SF12BW125 600 +))) 601 + 602 +((( 603 +486.9 - SF7BW125 to SF12BW125 604 +))) 605 + 606 +((( 607 +487.1 - SF7BW125 to SF12BW125 608 +))) 609 + 610 +((( 611 +487.3 - SF7BW125 to SF12BW125 612 +))) 613 + 614 +((( 615 +487.5 - SF7BW125 to SF12BW125 616 +))) 617 + 618 +((( 619 +487.7 - SF7BW125 to SF12BW125 620 +))) 621 + 622 +((( 623 + 624 +))) 625 + 626 +((( 627 +(% style="color:blue" %)**Downlink:** 628 +))) 629 + 630 +((( 631 +506.7 - SF7BW125 to SF12BW125 632 +))) 633 + 634 +((( 635 +506.9 - SF7BW125 to SF12BW125 636 +))) 637 + 638 +((( 639 +507.1 - SF7BW125 to SF12BW125 640 +))) 641 + 642 +((( 643 +507.3 - SF7BW125 to SF12BW125 644 +))) 645 + 646 +((( 647 +507.5 - SF7BW125 to SF12BW125 648 +))) 649 + 650 +((( 651 +507.7 - SF7BW125 to SF12BW125 652 +))) 653 + 654 +((( 655 +507.9 - SF7BW125 to SF12BW125 656 +))) 657 + 658 +((( 659 +508.1 - SF7BW125 to SF12BW125 660 +))) 661 + 662 +((( 663 +505.3 - SF12BW125 (RX2 downlink only) 664 +))) 665 + 666 + 667 + 668 +=== 2.6.4 AU915-928(AU915) === 669 + 670 +((( 671 +Default use CHE=2 672 + 673 +(% style="color:blue" %)**Uplink:** 674 + 675 +916.8 - SF7BW125 to SF12BW125 676 + 677 +917.0 - SF7BW125 to SF12BW125 678 + 679 +917.2 - SF7BW125 to SF12BW125 680 + 681 +917.4 - SF7BW125 to SF12BW125 682 + 683 +917.6 - SF7BW125 to SF12BW125 684 + 685 +917.8 - SF7BW125 to SF12BW125 686 + 687 +918.0 - SF7BW125 to SF12BW125 688 + 689 +918.2 - SF7BW125 to SF12BW125 690 + 691 + 692 +(% style="color:blue" %)**Downlink:** 693 + 694 +923.3 - SF7BW500 to SF12BW500 695 + 696 +923.9 - SF7BW500 to SF12BW500 697 + 698 +924.5 - SF7BW500 to SF12BW500 699 + 700 +925.1 - SF7BW500 to SF12BW500 701 + 702 +925.7 - SF7BW500 to SF12BW500 703 + 704 +926.3 - SF7BW500 to SF12BW500 705 + 706 +926.9 - SF7BW500 to SF12BW500 707 + 708 +927.5 - SF7BW500 to SF12BW500 709 + 710 +923.3 - SF12BW500(RX2 downlink only) 711 + 712 + 713 + 714 +))) 715 + 716 +=== 2.6.5 AS920-923 & AS923-925 (AS923) === 717 + 718 +((( 719 +(% style="color:blue" %)**Default Uplink channel:** 720 +))) 721 + 722 +((( 723 +923.2 - SF7BW125 to SF10BW125 724 +))) 725 + 726 +((( 727 +923.4 - SF7BW125 to SF10BW125 728 +))) 729 + 730 +((( 731 + 732 +))) 733 + 734 +((( 735 +(% style="color:blue" %)**Additional Uplink Channel**: 736 +))) 737 + 738 +((( 739 +(OTAA mode, channel added by JoinAccept message) 740 +))) 741 + 742 +((( 743 + 744 +))) 745 + 746 +((( 747 +(% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**: 748 +))) 749 + 750 +((( 751 +922.2 - SF7BW125 to SF10BW125 752 +))) 753 + 754 +((( 755 +922.4 - SF7BW125 to SF10BW125 756 +))) 757 + 758 +((( 759 +922.6 - SF7BW125 to SF10BW125 760 +))) 761 + 762 +((( 763 +922.8 - SF7BW125 to SF10BW125 764 +))) 765 + 766 +((( 767 +923.0 - SF7BW125 to SF10BW125 768 +))) 769 + 770 +((( 771 +922.0 - SF7BW125 to SF10BW125 772 +))) 773 + 774 +((( 775 + 776 +))) 777 + 778 +((( 779 +(% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**: 780 +))) 781 + 782 +((( 783 +923.6 - SF7BW125 to SF10BW125 784 +))) 785 + 786 +((( 787 +923.8 - SF7BW125 to SF10BW125 788 +))) 789 + 790 +((( 791 +924.0 - SF7BW125 to SF10BW125 792 +))) 793 + 794 +((( 795 +924.2 - SF7BW125 to SF10BW125 796 +))) 797 + 798 +((( 799 +924.4 - SF7BW125 to SF10BW125 800 +))) 801 + 802 +((( 803 +924.6 - SF7BW125 to SF10BW125 804 +))) 805 + 806 +((( 807 + 808 +))) 809 + 810 +((( 811 +(% style="color:blue" %)**Downlink:** 812 +))) 813 + 814 +((( 815 +Uplink channels 1-8 (RX1) 816 +))) 817 + 818 +((( 819 +923.2 - SF10BW125 (RX2) 820 +))) 821 + 822 + 823 + 824 +=== 2.6.6 KR920-923 (KR920) === 825 + 826 +((( 827 +(% style="color:blue" %)**Default channel:** 828 +))) 829 + 830 +((( 831 +922.1 - SF7BW125 to SF12BW125 832 +))) 833 + 834 +((( 835 +922.3 - SF7BW125 to SF12BW125 836 +))) 837 + 838 +((( 839 +922.5 - SF7BW125 to SF12BW125 840 +))) 841 + 842 +((( 843 + 844 +))) 845 + 846 +((( 847 +(% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)** 848 +))) 849 + 850 +((( 851 +922.1 - SF7BW125 to SF12BW125 852 +))) 853 + 854 +((( 855 +922.3 - SF7BW125 to SF12BW125 856 +))) 857 + 858 +((( 859 +922.5 - SF7BW125 to SF12BW125 860 +))) 861 + 862 +((( 863 +922.7 - SF7BW125 to SF12BW125 864 +))) 865 + 866 +((( 867 +922.9 - SF7BW125 to SF12BW125 868 +))) 869 + 870 +((( 871 +923.1 - SF7BW125 to SF12BW125 872 +))) 873 + 874 +((( 875 +923.3 - SF7BW125 to SF12BW125 876 +))) 877 + 878 +((( 879 + 880 +))) 881 + 882 +((( 883 +(% style="color:blue" %)**Downlink:** 884 +))) 885 + 886 +((( 887 +Uplink channels 1-7(RX1) 888 +))) 889 + 890 +((( 891 +921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125) 892 +))) 893 + 894 + 895 + 896 +=== 2.6.7 IN865-867 (IN865) === 897 + 898 +((( 899 +(% style="color:blue" %)**Uplink:** 900 +))) 901 + 902 +((( 903 +865.0625 - SF7BW125 to SF12BW125 904 +))) 905 + 906 +((( 907 +865.4025 - SF7BW125 to SF12BW125 908 +))) 909 + 910 +((( 911 +865.9850 - SF7BW125 to SF12BW125 912 +))) 913 + 914 +((( 915 + 916 +))) 917 + 918 +((( 919 +(% style="color:blue" %)**Downlink:** 920 +))) 921 + 922 +((( 923 +Uplink channels 1-3 (RX1) 924 +))) 925 + 926 +((( 927 +866.550 - SF10BW125 (RX2) 928 +))) 929 + 930 + 931 + 932 +== 2.7 LED Indicator == 933 + 934 +The LDDS75 has an internal LED which is to show the status of different state. 935 + 936 + 491 491 * Blink once when device power on. 492 492 * The device detects the sensor and flashes 5 times. 493 493 * Solid ON for 5 seconds once device successful Join the network. 494 494 * Blink once when device transmit a packet. 495 495 496 - 497 - 498 498 == 2.8 Firmware Change Log == 499 499 500 500
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