Changes for page DS20L -- LoRaWAN Smart Distance Detector User Manual 01
Last modified by Mengting Qiu on 2023/12/14 11:15
Summary
-
Page properties (1 modified, 0 added, 0 removed)
Details
- Page properties
-
- Content
-
... ... @@ -57,8 +57,6 @@ 57 57 * IP66 Waterproof Enclosure 58 58 * 8500mAh Battery for long term use 59 59 60 - 61 - 62 62 == 1.3 Specification == 63 63 64 64 ... ... @@ -87,8 +87,6 @@ 87 87 * Sleep Mode: 5uA @ 3.3v 88 88 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm 89 89 90 - 91 - 92 92 == 1.4 Suitable Container & Liquid == 93 93 94 94 ... ... @@ -97,16 +97,13 @@ 97 97 * Container Thickness: 98 98 ** Pure metal material. 2~~8mm, best is 3~~5mm 99 99 ** Pure non metal material: <10 mm 100 -* Pure liquid without irregular deposition. 96 +* Pure liquid without irregular deposition.(% style="display:none" %) 101 101 102 102 103 - 104 -(% style="display:none" %) 105 - 106 106 == 1.5 Install DDS20-LB == 107 107 108 108 109 -(% style="color:blue" %)**Step 1**(%%): **Choose the installation point.**102 +(% style="color:blue" %)**Step 1**(%%): Choose the installation point. 110 110 111 111 DDS20-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position. 112 112 ... ... @@ -114,7 +114,7 @@ 114 114 115 115 116 116 ((( 117 -(% style="color:blue" %)**Step 2**(%%): **Polish the installation point.**110 +(% style="color:blue" %)**Step 2**(%%): Polish the installation point. 118 118 ))) 119 119 120 120 ((( ... ... @@ -130,7 +130,7 @@ 130 130 131 131 132 132 ((( 133 -(% style="color:blue" %)**Step3: **(%%) **Test the installation point.**126 +(% style="color:blue" %)**Step3: **(%%)Test the installation point. 134 134 ))) 135 135 136 136 ((( ... ... @@ -147,11 +147,11 @@ 147 147 148 148 149 149 ((( 150 -(% style="color: blue" %)**LED Status:**143 +(% style="color:red" %)**LED Status:** 151 151 ))) 152 152 153 153 * ((( 154 - **Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.147 +Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well. 155 155 ))) 156 156 157 157 * ((( ... ... @@ -167,12 +167,16 @@ 167 167 168 168 169 169 ((( 170 -(% style="color:red" %)**Note :** (%%)** (% style="color:blue" %)Ultrasonic coupling paste(%%)**(% style="color:blue" %) (%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.163 +(% style="color:red" %)**Note 2:** 171 171 ))) 172 172 166 +((( 167 +(% 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. 168 +))) 173 173 170 + 174 174 ((( 175 -(% style="color:blue" %)**Step4: **(%%) **Install use Epoxy ab glue.**172 +(% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue. 176 176 ))) 177 177 178 178 ((( ... ... @@ -191,13 +191,11 @@ 191 191 192 192 193 193 ((( 194 -(% style="color:red" %)**Note :** 195 - 196 -(% style="color:red" %)**1:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position. 191 +(% style="color:red" %)**Note 1:(%%) (% style="color:blue" %)Eproxy AB glue**(%%) needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position. 197 197 ))) 198 198 199 199 ((( 200 -(% style="color:red" %)**2: **(%%)**(% style="color:blue" %)Eproxy AB glue(%%)**is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.195 +(% style="color:red" %)**Note 2:(%%) (% style="color:blue" %)Eproxy AB glue**(%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally. 201 201 ))) 202 202 203 203 ... ... @@ -204,9 +204,9 @@ 204 204 == 1.6 Applications == 205 205 206 206 207 -* Smart liquid control solution 202 +* Smart liquid control solution. 208 208 209 -* Smart liquefied gas solution 204 +* Smart liquefied gas solution. 210 210 211 211 212 212 ... ... @@ -217,11 +217,9 @@ 217 217 218 218 * 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. 219 219 220 -* 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. 215 +* 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.(% style="display:none" %) 221 221 222 222 223 -(% style="display:none" %) 224 - 225 225 == 1.8 Sleep mode and working mode == 226 226 227 227 ... ... @@ -249,8 +249,6 @@ 249 249 ))) 250 250 |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode. 251 251 252 - 253 - 254 254 == 1.10 BLE connection == 255 255 256 256 ... ... @@ -295,7 +295,7 @@ 295 295 == 2.1 How it works == 296 296 297 297 298 -The DDS 20-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and press the button to activate the DDS20-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.289 +The DDS45-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and press the button to activate the DDS45-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes. 299 299 300 300 (% style="display:none" %) (%%) 301 301 ... ... @@ -309,9 +309,9 @@ 309 309 [[image:image-20230613140140-4.png||height="453" width="800"]](% style="display:none" %) 310 310 311 311 312 -(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS 20-LB.303 +(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS45-LB. 313 313 314 -Each DDS 20-LB is shipped with a sticker with the default device EUI as below:305 +Each DDS45-LB is shipped with a sticker with the default device EUI as below: 315 315 316 316 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]] 317 317 ... ... @@ -340,10 +340,10 @@ 340 340 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-6.png?width=744&height=485&rev=1.1||alt="图片-20220611161308-6.png"]] 341 341 342 342 343 -(% style="color:blue" %)**Step 2:**(%%) Activate on DDS 20-LB334 +(% style="color:blue" %)**Step 2:**(%%) Activate on DDS45-LB 344 344 345 345 346 -Press the button for 5 seconds to activate the DDS 20-LB.337 +Press the button for 5 seconds to activate the DDS45-LB. 347 347 348 348 (% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:blue" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network. (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network. 349 349 ... ... @@ -354,7 +354,7 @@ 354 354 355 355 356 356 ((( 357 -DDS 20-LB will uplink payload via LoRaWAN with below payload format:348 +DDS45-LB will uplink payload via LoRaWAN with below payload format: 358 358 ))) 359 359 360 360 ((( ... ... @@ -365,7 +365,7 @@ 365 365 |=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)((( 366 366 **Size(bytes)** 367 367 )))|=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="background-color:#D9E2F3;color:#0070C0" %)1|=(% style="background-color:#D9E2F3;color:#0070C0" %)2|=(% style="background-color:#D9E2F3;color:#0070C0" %)**1** 368 -|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|((( 359 +|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|((( 369 369 [[Distance>>||anchor="H2.3.2A0Distance"]] 370 370 (unit: mm) 371 371 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|((( ... ... @@ -372,13 +372,13 @@ 372 372 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]] 373 373 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]] 374 374 375 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS 20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/1654850511545-399.png?rev=1.1||alt="1654850511545-399.png"]]366 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654850511545-399.png?rev=1.1||alt="1654850511545-399.png"]] 376 376 377 377 378 378 === 2.3.1 Battery Info === 379 379 380 380 381 -Check the battery voltage for DDS 20-LB.372 +Check the battery voltage for DDS45-LB. 382 382 383 383 Ex1: 0x0B45 = 2885mV 384 384 ... ... @@ -389,19 +389,18 @@ 389 389 390 390 391 391 ((( 392 -Get the distance. Flat object range 20mm -2000mm.383 +Get the distance. Flat object range 30mm - 4500mm. 393 393 ))) 394 394 395 395 ((( 396 -For example, if the data you get from the register is **0x0 60x05**, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** **387 +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" %)** ** 397 397 398 -(% style="color:blue" %)**0 605(H) = 1541(D) = 1541mm.**389 +(% style="color:blue" %)**0B05(H) = 2821 (D) = 2821 mm.** 399 399 ))) 400 400 401 401 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor. 393 +* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00. 402 402 403 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid. 404 - 405 405 === 2.3.3 Interrupt Pin === 406 406 407 407 ... ... @@ -448,7 +448,7 @@ 448 448 The payload decoder function for TTN V3 is here: 449 449 450 450 ((( 451 -DDS 20-LB TTN V3 Payload Decoder: [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]441 +DDS45-LB TTN V3 Payload Decoder: [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]] 452 452 ))) 453 453 454 454 ... ... @@ -455,7 +455,7 @@ 455 455 == 2.4 Uplink Interval == 456 456 457 457 458 -The DDS 20-LB 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>>||anchor="H3.3.1SetTransmitIntervalTime"]]448 +The DDS45-LB 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>>||anchor="H3.3.1SetTransmitIntervalTime"]] 459 459 460 460 461 461 == 2.5 Show Data in DataCake IoT Server == ... ... @@ -483,7 +483,7 @@ 483 483 484 484 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.** 485 485 486 -(% style="color:blue" %)**Step 4**(%%)**: Search the DDS 20-LB and add DevEUI.**476 +(% style="color:blue" %)**Step 4**(%%)**: Search the DDS45-LB and add DevEUI.** 487 487 488 488 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654851029373-510.png?rev=1.1||alt="1654851029373-510.png"]] 489 489 ... ... @@ -497,19 +497,19 @@ 497 497 == 2.6 Datalog Feature == 498 498 499 499 500 -Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DDS 20-LB will store the reading for future retrieving purposes.490 +Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DDS45-LB will store the reading for future retrieving purposes. 501 501 502 502 503 503 === 2.6.1 Ways to get datalog via LoRaWAN === 504 504 505 505 506 -Set PNACKMD=1, DDS 20-LB will wait for ACK for every uplink, when there is no LoRaWAN network,DDS20-LB 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 +Set PNACKMD=1, DDS45-LB will wait for ACK for every uplink, when there is no LoRaWAN network,DDS45-LB 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. 507 507 508 508 * ((( 509 -a) DDS 20-LB will do an ACK check for data records sending to make sure every data arrive server.499 +a) DDS45-LB will do an ACK check for data records sending to make sure every data arrive server. 510 510 ))) 511 511 * ((( 512 -b) DDS 20-LB will send data in **CONFIRMED Mode** when PNACKMD=1, but DDS20-LB 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 DDS20-LB gets a ACK, DDS20-LB will consider there is a network connection and resend all NONE-ACK messages.502 +b) DDS45-LB will send data in **CONFIRMED Mode** when PNACKMD=1, but DDS45-LB 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 DDS45-LB gets a ACK, DDS45-LB will consider there is a network connection and resend all NONE-ACK messages. 513 513 ))) 514 514 515 515 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1) ... ... @@ -520,7 +520,7 @@ 520 520 === 2.6.2 Unix TimeStamp === 521 521 522 522 523 -DDS 20-LB uses Unix TimeStamp format based on513 +DDS45-LB uses Unix TimeStamp format based on 524 524 525 525 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-11.png?width=627&height=97&rev=1.1||alt="图片-20220523001219-11.png" height="97" width="627"]] 526 526 ... ... @@ -539,7 +539,7 @@ 539 539 540 540 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command. 541 541 542 -Once DDS 20-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DDS20-LB. If DDS20-LB fails to get the time from the server, DDS20-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).532 +Once DDS45-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DDS45-LB. If DDS45-LB fails to get the time from the server, DDS45-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days). 543 543 544 544 (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.** 545 545 ... ... @@ -567,7 +567,7 @@ 567 567 ))) 568 568 569 569 ((( 570 -Uplink Internal =5s,means DDS 20-LB will send one packet every 5s. range 5~~255s.560 +Uplink Internal =5s,means DDS45-LB will send one packet every 5s. range 5~~255s. 571 571 ))) 572 572 573 573 ... ... @@ -574,17 +574,17 @@ 574 574 == 2.7 Frequency Plans == 575 575 576 576 577 -The DDS 20-LB 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.567 +The DDS45-LB 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. 578 578 579 579 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]] 580 580 581 581 582 -= 3. Configure DDS 20-LB =572 += 3. Configure DDS45-LB = 583 583 584 584 == 3.1 Configure Methods == 585 585 586 586 587 -DDS 20-LB supports below configure method:577 +DDS45-LB supports below configure method: 588 588 589 589 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]]. 590 590 ... ... @@ -606,10 +606,10 @@ 606 606 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]] 607 607 608 608 609 -== 3.3 Commands special design for DDS 20-LB ==599 +== 3.3 Commands special design for DDS45-LB == 610 610 611 611 612 -These commands only valid for DDS 20-LB, as below:602 +These commands only valid for DDS45-LB, as below: 613 613 614 614 615 615 === 3.3.1 Set Transmit Interval Time === ... ... @@ -691,7 +691,7 @@ 691 691 = 4. Battery & Power Consumption = 692 692 693 693 694 -DDS 20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.684 +DDS45-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace. 695 695 696 696 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] . 697 697 ... ... @@ -700,7 +700,7 @@ 700 700 701 701 702 702 (% class="wikigeneratedid" %) 703 -User can change firmware DDS 20-LB to:693 +User can change firmware DDS45-LB to: 704 704 705 705 * Change Frequency band/ region. 706 706 ... ... @@ -708,26 +708,26 @@ 708 708 709 709 * Fix bugs. 710 710 711 -Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]**701 +Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/a5ue0nfrzqy9nz6/AABbvlATosDJKDwBmbirVbMYa?dl=0]]** 712 712 713 713 Methods to Update Firmware: 714 714 715 -* (Recommanded way) OTA firmware update via wireless: **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]**705 +* (Recommanded way) OTA firmware update via wireless: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]] 716 716 717 717 * Update through UART TTL interface: **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**. 718 718 719 719 = 6. FAQ = 720 720 721 -== 6.1 What is the frequency plan for DDS 20-LB? ==711 +== 6.1 What is the frequency plan for DDS45-LB? == 722 722 723 723 724 -DDS 20-LB use the same frequency as other Dragino products. User can see the detail from this link: [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]714 +DDS45-LB use the same frequency as other Dragino products. User can see the detail from this link: [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]] 725 725 726 726 727 -== 6.2 Can I use DDS 20-LB in condensation environment? ==717 +== 6.2 Can I use DDS45-LB in condensation environment? == 728 728 729 729 730 -DDS 20-LB is not suitable to be used in condensation environment. Condensation on the DDS20-LB probe will affect the reading and always got 0.720 +DDS45-LB is not suitable to be used in condensation environment. Condensation on the DDS45-LB probe will affect the reading and always got 0. 731 731 732 732 733 733 = 7. Trouble Shooting = ... ... @@ -744,20 +744,41 @@ 744 744 In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:blue" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:blue" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string. 745 745 746 746 747 -== 7.3 Why i always see0x0000or0forthedistancevalue?==737 +== 7.3 Why does the sensor reading show 0 or "No sensor" == 748 748 749 749 750 -((( 751 -LDDS20 has a strict [[**installation requirement**>>||anchor="H1.5A0InstallDDS20-LB"]]. Please make sure the installation method exactly follows up with the installation requirement. Otherwise, the reading might be always 0x00. 740 +~1. The measurement object is very close to the sensor, but in the blind spot of the sensor. 752 752 753 -If you have followed the instruction requirement exactly but still see the 0x00 reading issue, please. please double-check the decoder, you can check the raw payload to verify. 754 -))) 742 +2. Sensor wiring is disconnected 755 755 744 +3. Not using the correct decoder 756 756 746 + 747 +== 7.4 Abnormal readings The gap between multiple readings is too large or the gap between the readings and the actual value is too large == 748 + 749 + 750 +1) Please check if there is something on the probe affecting its measurement (condensed water, volatile oil, etc.) 751 + 752 +2) Does it change with temperature, temperature will affect its measurement 753 + 754 +3) If abnormal data occurs, you can turn on DEBUG mode, Please use downlink or AT COMMAN to enter DEBUG mode. 755 + 756 +downlink command: (% style="color:blue" %)**F1 01**(%%), AT command: (% style="color:blue" %)**AT+DDEBUG=1** 757 + 758 +4) After entering the debug mode, it will send 20 pieces of data at a time, and you can send its uplink to us for analysis 759 + 760 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20230113135125-2.png?width=1057&height=136&rev=1.1||alt="image-20230113135125-2.png"]] 761 + 762 + 763 +Its original payload will be longer than other data. Even though it is being parsed, it can be seen that it is abnormal data. 764 + 765 +Please send the data to us for check. 766 + 767 + 757 757 = 8. Order Info = 758 758 759 759 760 -Part Number: (% style="color:blue" %)**DDS 20-LB-XXX**771 +Part Number: (% style="color:blue" %)**DDS45-LB-XXX** 761 761 762 762 (% style="color:red" %)**XXX**(%%): **The default frequency band** 763 763 ... ... @@ -782,7 +782,7 @@ 782 782 783 783 (% style="color:#037691" %)**Package Includes**: 784 784 785 -* DDS 20-LB LoRaWANUltrasonicLiquid LevelSensor x 1796 +* DDS45-LB LoRaWAN Distance Detection Sensor x 1 786 786 787 787 (% style="color:#037691" %)**Dimension and weight**: 788 788