Version 240.8 by Xiaoling on 2023/04/04 14:39
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2 [[image:image-20230203113613-1.png]]
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6
7 **Table of Contents:**
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9 {{toc/}}
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17
18 = 1.  Introduction =
19
20 == 1.1 ​ What is LMDS120 Microwave Radar DistanceSensor ==
21
22
23 (((
24 The Dragino LMDS120 is a (% style="color:blue" %)**LoRaWAN Microwave Radar distance sensor**(%%). It uses use Microwave Radar to detect the distance between sensor and different objects. Different from ultrosonic or Lidar measurement. Microwave Radar is (% style="color:blue" %)**more reliable for condensation / dusty environment**(%%). It can sense correct distance even there is water or think dust on top of the sensor.
25 )))
26
27 (((
28 The LMDS120 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.
29 )))
30
31 (((
32 The LoRa wireless technology used in LMDS120 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
33 )))
34
35 (((
36 LMDS120 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.
37 )))
38
39 (((
40 Each LMDS120 is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.
41 )))
42
43
44 [[image:image-20230203114147-2.png]]
45
46
47 == ​1.2  Features ==
48
49
50 * LoRaWAN 1.0.3 Class A
51 * Ultra-low power consumption
52 * 60Ghz Microwave Radar for distance detection
53 * Monitor Battery Level
54 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
55 * AT Commands to change parameters
56 * Uplink on periodically
57 * Downlink to change configure
58 * 8500mAh Battery for long term use
59 * Wall Mountable
60 * Outdoor Use
61
62
63
64 == 1.3  Radar probe specification ==
65
66
67 * Measuring Method: FMCW
68 * Frequency: 60 GHz
69 * Measure Range : 15cm ~~ 1200cm
70 * Accuracy: ± (3mm + S*0.2%). S: Measure Value
71 * Resolution: 0.01m
72 * Measurement Angle : 25 degrees horizontal and 23 degrees vertical
73
74
75
76 == 1.4  Storage & Operation Temperature ==
77
78
79 -15°C to +65°C
80
81
82 == 1.5 ​ Applications ==
83
84
85 * Horizontal distance measurement
86 * Liquid level measurement
87 * Parking management system
88 * Object proximity and presence detection
89 * Intelligent trash can management system
90 * Robot obstacle avoidance
91 * Automatic control
92 * Sewer
93 * Bottom water level monitoring
94
95
96
97 == 1.6  Pin mapping and power on ==
98
99
100 [[image:1655257026882-201.png]]
101
102 (% style="display:none" %) (%%)
103
104 = 2.  Operation Mode =
105
106 == 2.1  How it works ==
107
108
109 (((
110 Each LMDS120 is shipped with a worldwide unique set of OTAA keys. To use LMDS120 in a LoRaWAN network, user needs to input the OTAA keys in the LoRaWAN network server. So LMDS120 can join the LoRaWAN network and start to transmit sensor data.
111 )))
112
113
114 == 2.2  ​Example to use for LoRaWAN network ==
115
116
117 (((
118 Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[DLOS8 >>https://www.dragino.com/products/lora-lorawan-gateway/item/160-dlos8.html]] as a LoRaWAN gateway in this example.
119 )))
120
121 (((
122 [[image:image-20230203115545-3.png]]
123
124 * In this user case, the LMDS120 is installed on top of river to detect the water level and send the level info to the LoRaWAN server. The LMDS120 will uplink different types of messages to the LoRaWAN server. See [[Uplink payload>>path:#Uplink_Payload]] for detail.
125 )))
126
127 (((
128 Assume the LoRaWAN Gateway DLOS8 is already set to connect to the [[TTN V3 network >>url:https://eu1.cloud.thethings.network]]. We need to add the LMDS120 device in TTN V3:
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130
131 (((
132 (((
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134 )))
135
136 (((
137 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LMDS120.
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139 )))
140
141 (((
142 (((
143 Each LMDS120 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
144
145 [[image:1655278302970-688.png]]
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147
148 )))
149 )))
150
151 Users can enter these keys in the LoRaWAN Server portal. Below is the TTN V3 screenshot:
152
153 __**Add APP EUI**__ in the application.
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155
156 [[image:image-20220610161353-4.png]]
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159 [[image:image-20220610161353-5.png]]
160
161
162 [[image:image-20220610161353-6.png]]
163
164
165 [[image:image-20220610161353-7.png]]
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167
168
169 You can also choose to create the device manually.
170
171 [[image:image-20220610161538-8.png]]
172
173
174
175 **Add APP KEY and DEV EUI**
176
177 [[image:1655278497961-944.png]]
178
179
180 (% style="color:blue" %)**Step 2**(%%):  Power on LMDS120
181
182
183 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
184
185 [[image:1655278589727-228.png]]
186
187 (((
188 Put the jumper to power on LMDS120 and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and the user can see it in the panel.
189 )))
190
191
192 == 2.3  ​Uplink Payload ==
193
194
195 Uplink payloads have two types:
196
197 * Distance Value: Use FPORT=2
198 * Other control commands: Use other FPORT fields.
199
200 The application server should parse the correct value based on FPORT settings.
201
202
203 === 2.3.1  Device Status, FPORT~=5 ===
204
205
206 (((
207 Include device configure status. Once LMDS120 Joined the network, it will uplink this message to the server.
208 )))
209
210 (((
211 Users can also use the downlink command (0x26 01) to ask LMDS120 to resend Device Status.
212 )))
213
214 (% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:395.222px" %)
215 |=(% colspan="6" %)**Device Status (FPORT=5)**
216 |(% style="width:94px" %)**Size(bytes)**|(% style="width:68px" %)**1**|(% style="width:80px" %)**2**|(% style="width:86px" %)**1**|(% style="width:61px" %)**1**
217 |(% style="width:94px" %)**Value**|(% style="width:68px" %)Sensor Model|(% style="width:80px" %)Firmware Version|(% style="width:86px" %)Frequency Band|(% style="width:61px" %)Sub-band
218
219 [[image:image-20230203133803-4.png]]
220
221
222 * (% style="color:#037691" %)**Sensor Model**(%%)**:** For LMDS120, this value is 0x18
223
224 * (% style="color:#037691" %)**Firmware Version**(%%)**:** 0x0100, Means: v1.0.0 version
225
226 * (% style="color:#037691" %)**Frequency Band**(%%)**:**
227
228 *0x01: EU868
229
230 *0x02: US915
231
232 *0x03: IN865
233
234 *0x04: AU915
235
236 *0x05: KZ865
237
238 *0x06: RU864
239
240 *0x07: AS923
241
242 *0x08: AS923-1
243
244 *0x09: AS923-2
245
246 *0x0a: AS923-3
247
248 *0x0b: AS923-4
249
250
251 * (% style="color:#037691" %)**Sub-Band**(%%)**:**
252 ** AU915 and US915:value 0x00 ~~ 0x08
253 ** CN470: value 0x0B ~~ 0x0C
254 ** Other Bands: Always 0x00
255
256
257
258 === 2.3.2  Distance, Uplink FPORT~=2 ===
259
260
261 LMDS120 will send this uplink **after** Device Status once join the LoRaWAN network successfully. And LMDS120 will:
262
263 1. periodically send this uplink every 20 minute (TDC time), this interval [[can be changed>>||anchor="H3.1A0SetTransmitIntervalTime280x0129"]].
264 1. send this uplink while there is [[interrupt event>>||anchor="H3.2A0SetInterruptMode280x0629"]].
265
266 Uplink Payload totals 11 bytes.
267
268
269 (% border="1" cellspacing="4" style="background-color:#f7faff; width:360px" %)
270 |=(% colspan="6" style="width: 367px;" %)**Distance Value, FPORT=2**
271 |(% style="width:72px" %)**Size(bytes)**|(% style="width:43px" %)**2**|(% style="width:76px" %)**2**|(% style="width:76px" %)**1**|(% style="width:75px" %)**2**|(% style="width:75px" %)**1**
272 |(% style="width:72px" %)**Value**|(% style="width:43px" %)BAT|(% style="width:76px" %)Distance|(% style="width:76px" %)interrupt|(% style="width:75px" %)DS18B20 temperature|(% style="width:75px" %)Sensor flag
273
274 [[image:image-20230203142732-5.png]]
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276
277 (((
278 (% style="color:#037691" %)**Distance:**
279 )))
280
281 (((
282 Distance between sensor probe to the first object. (unit: cm)
283 )))
284
285 (((
286 For example, if the data you get from the register is** __0x0D 0xC6__**, the distance between the sensor and the measured object is(% style="color:#037691" %)** 0DC6(H) = 115 (D) = 115 cm.**
287 )))
288
289
290 (((
291 (% style="color:red" %)**Notice: The distance has a special value :**
292 )))
293
294 (((
295 (% style="color:blue" %)**0x3FFF**(%%): Reading Invalid (exceed the valid range of the probe) or Probe not detected.
296 )))
297
298
299 === 2.3.3  Decoder in TTN V3 ===
300
301
302 [[image:1655261164557-670.png]]
303
304
305 (((
306 Please check the decoder from this link: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
307 )))
308
309
310 == 2.4  ​Show data on Datacake ==
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312
313 (((
314 Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
315
316
317 )))
318
319 (((
320 (% style="color:blue" %)**Step 1**(%%)**: **Link TTNv3 to [[DATACAKE>>url:https://datacake.co/]]
321 )))
322
323 (((
324 (% style="color:blue" %)**Step 2**(%%)**: **Configure LMDS120 in Datacake
325 )))
326
327
328 [[image:image-20230203150230-6.png]]
329
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331 [[image:image-20220615163646-7.png]]
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334 [[image:image-20230203150402-8.png]]
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337 [[image:image-20230203150513-9.png]]
338
339 (% style="display:none" %) (%%)
340
341 [[image:image-20230203150531-10.png]](% style="display:none" %)
342
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344 (% style="display:none" %)
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346 (% style="display:none" %) (%%) [[image:image-20230203150555-11.png]]
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349 (% style="display:none" %)
350
351 = 3.  Configure LMDS120 via AT Command or LoRaWAN Downlink =
352
353
354 (((
355 (((
356 Use can configure LMDS120 via AT Command or LoRaWAN Downlink.
357 )))
358 )))
359
360 * (((
361 (((
362 AT Command Connection: See [[FAQ>>||anchor="H5.A0FAQ"]].
363 )))
364 )))
365 * (((
366 (((
367 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
368 )))
369 )))
370
371 (((
372 (((
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374 )))
375
376 (((
377 There are two kinds of commands to configure LMDS120, they are:
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379 )))
380
381 * (((
382 (((
383 (% style="color:#4f81bd" %)** General Commands**.
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385 )))
386
387 (((
388 (((
389 These commands are to configure:
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391 )))
392
393 * (((
394 (((
395 General system settings like: uplink interval.
396 )))
397 )))
398 * (((
399 (((
400 LoRaWAN protocol & radio related command.
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402 )))
403
404 (((
405 (((
406 They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack**(Note~*~*)**. These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
407 )))
408 )))
409
410 (((
411 (((
412
413 )))
414 )))
415
416 * (((
417 (((
418 (% style="color:#4f81bd" %)** Commands special design for LMDS120**
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420 )))
421
422 (((
423 (((
424 These commands only valid for LMDS120, as below:
425 )))
426 )))
427
428
429 == 3.1  Set Transmit Interval Time(0x01) ==
430
431
432 Feature: Change LoRaWAN End Node Transmit Interval.
433
434 (% style="color:#037691" %)**AT Command: AT+TDC**
435
436 (% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)
437 |=(% style="width: 156px;" %)**Command Example**|=(% style="width: 137px;" %)**Function**|=**Response**
438 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
439 30000
440 OK
441 the interval is 30000ms = 30s
442 )))
443 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
444 OK
445 Set transmit interval to 60000ms = 60 seconds
446 )))
447
448 (((
449 (% style="color:#037691" %)**Downlink Command: 0x01**
450 )))
451
452 Format: Command Code (0x01) followed by 3 bytes time value.
453
454 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
455
456 **Example 1:** Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
457
458 **Example 2: **Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
459
460
461 == 3.2  Set Interrupt Mode(0x06) ==
462
463
464 (((
465 Feature, Set Interrupt mode for GPIO_EXIT.
466 )))
467
468 (((
469 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
470 )))
471
472 (% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)
473 |=(% style="width: 154px;" %)**Command Example**|=(% style="width: 196px;" %)**Function**|=(% style="width: 157px;" %)**Response**
474 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
475 0
476 OK
477 the mode is 0 = No interruption
478 )))
479 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
480 Set Transmit Interval
481 ~1. (Disable Interrupt),
482 2. (Trigger by rising and falling edge)
483 3. (Trigger by falling edge)
484 4. (Trigger by rising edge)
485 )))|(% style="width:157px" %)OK
486
487 (% style="color:#037691" %)**Downlink Command: 0x06**
488
489 Format: Command Code (0x06) followed by 3 bytes.
490
491 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
492
493 **Example 1: **Downlink Payload: 06000000  ~/~/ Turn off interrupt mode
494
495 **Example 2:** Downlink Payload: 06000003  ~/~/ Set the interrupt mode to rising edge trigger
496
497
498 = 4. Battery & Power Consumption =
499
500
501 LMDS120 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
502
503 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
504
505
506 = 5.  FAQ =
507
508 == 5.1  How to use AT Command to configure LMDS120 ==
509
510
511 LMDS120 UART connection photo
512
513
514 [[image:image-20230203155404-15.png]]
515
516
517 LMDS120 supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LMDS120 to use AT command, as below.
518
519 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/test/WebHome/1654135840598-282.png?rev=1.1||alt="1654135840598-282.png"]]
520
521
522 In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LMDS120. LMDS120 will output system info once power on as below:
523
524 [[image:image-20220615180555-4.png]]
525
526
527 == 5.2  How to upgrade the firmware? ==
528
529
530 (((
531 A new firmware might be available for:
532 )))
533
534 * (((
535 Support new features
536 )))
537 * (((
538 For bug fix
539 )))
540 * (((
541 Change LoRaWAN bands.
542 )))
543
544 (((
545 Instruction for how to upgrade: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList>>http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList]]
546 )))
547
548 (((
549 Firmware location: [[https:~~/~~/www.dropbox.com/sh/vxhj7k0utq5dk4a/AAC-DW1UeeWSnSPeG-lHWg4da?dl=0>>https://www.dropbox.com/sh/vxhj7k0utq5dk4a/AAC-DW1UeeWSnSPeG-lHWg4da?dl=0]]
550 )))
551
552
553 == 5.3  How to change the LoRa Frequency Bands/Region ==
554
555
556 You can follow the instructions for [[how to upgrade image>>||anchor="H5.2A0Howtoupgradethefirmware3F"]].
557 When downloading the images, choose the required image file for download. ​
558
559
560 = 6.  Trouble Shooting =
561
562 == 6.1  AT Command input doesn't work ==
563
564
565 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:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
566
567
568 = 7.  Order Info =
569
570
571 Part Number **:** (% style="color:blue" %)**LMDS120-XX**
572
573
574 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
575
576 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
577 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
578 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
579 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
580 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
581 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
582 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
583 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
584
585
586
587 = 8. ​ Packing Info =
588
589
590 (((
591 **Package Includes**:
592 )))
593
594 (((
595 * LMDS120 LoRaWAN Microwave Radar Distance Sensor x 1
596 )))
597
598
599
600 = 9.  ​Support =
601
602
603 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
604
605 * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].

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