Last modified by Mengting Qiu on 2025/02/27 18:41
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4 [[image:image-20230203113613-1.png]]
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9 **Table of Contents:**
10
11 {{toc/}}
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19
20 = 1.  Introduction =
21
22 == 1.1 ​ What is LMDS120 Microwave Radar Distance Sensor ==
23
24
25 (((
26 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.
27 )))
28
29 (((
30 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.
31 )))
32
33 (((
34 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.
35 )))
36
37 (((
38 LMDS120 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.
39 )))
40
41 (((
42 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.
43 )))
44
45 [[image:image-20230203114147-2.png||height="355" width="767"]]
46
47
48 == ​1.2  Features ==
49
50
51 * LoRaWAN 1.0.3 Class A
52 * Ultra-low power consumption
53 * 60Ghz Microwave Radar for distance detection
54 * Monitor Battery Level
55 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
56 * AT Commands to change parameters
57 * Uplink on periodically
58 * Downlink to change configure
59 * 8500mAh Battery for long term use
60 * Wall Mountable
61 * Outdoor Use
62
63 == 1.3  Radar probe specification ==
64
65
66 * Measuring Method: FMCW
67 * Frequency: 60 GHz
68 * Measure Range : 15 ~~ 1200cm
69 * Accuracy: ±(2cm+SX0.3%). S: Measure Value
70 * Resolution: 1cm
71 * Measurement Angle : 25 degrees horizontal and 23 degrees vertical
72
73 == 1.4  Storage & Operation Temperature ==
74
75
76 -15°C to +65°C
77
78
79 == 1.5 ​ Applications ==
80
81
82 * Horizontal distance measurement
83 * Liquid level measurement
84 * Parking management system
85 * Object proximity and presence detection
86 * Intelligent trash can management system
87 * Robot obstacle avoidance
88 * Automatic control
89 * Sewer
90 * Bottom water level monitoring
91
92 == 1.6  Pin mapping and power on ==
93
94
95 [[image:1655257026882-201.png]]
96
97 (% style="display:none" %) (%%)
98
99 = 2.  Operation Mode =
100
101 == 2.1  How it works ==
102
103
104 (((
105 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.
106 )))
107
108
109 == 2.2  ​Example to use for LoRaWAN network ==
110
111
112 (((
113 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.
114 )))
115
116 (((
117 [[image:image-20230203115545-3.png||height="356" width="769"]]
118
119 * 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.
120 )))
121
122 (((
123 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:
124 )))
125
126 (((
127 (((
128
129 )))
130
131 (((
132 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LMDS120.
133 )))
134 )))
135
136 (((
137 (((
138 Each LMDS120 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
139
140 [[image:image-20230426085652-1.png||height="258" width="556"]]
141
142
143 )))
144 )))
145
146 Users can enter these keys in the LoRaWAN Server portal. Below is the TTN V3 screenshot:
147
148 __**Add APP EUI**__ in the application.
149
150
151 [[image:image-20220610161353-4.png]]
152
153
154 [[image:image-20220610161353-5.png]]
155
156
157 [[image:image-20220610161353-6.png]]
158
159
160 [[image:image-20220610161353-7.png]]
161
162
163
164 You can also choose to create the device manually.
165
166 [[image:image-20220610161538-8.png]]
167
168
169
170 **Add APP KEY and DEV EUI**
171
172 [[image:1655278497961-944.png]]
173
174
175 (% style="color:blue" %)**Step 2**(%%):  Power on LMDS120
176
177
178 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
179
180 [[image:1655278589727-228.png]]
181
182 (((
183 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.
184 )))
185
186
187 == 2.3  ​Uplink Payload ==
188
189
190 Uplink payloads have two types:
191
192 * Distance Value: Use FPORT=2
193 * Other control commands: Use other FPORT fields.
194
195 The application server should parse the correct value based on FPORT settings.
196
197
198 === 2.3.1  Device Status, FPORT~=5 ===
199
200
201 (((
202 Include device configure status. Once LMDS120 Joined the network, it will uplink this message to the server.
203 )))
204
205 Users can also use the downlink command (0x26 01) to ask LMDS120 to resend Device Status.
206
207 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:490px" %)
208 |=(% colspan="6" style="background-color:#4F81BD;color:white" %)Device Status (FPORT=5)
209 |(% style="width:60px" %)**Size(bytes)**|(% style="width:80px" %)**1**|(% style="width:140px" %)**2**|(% style="width:140px" %)**1**|(% style="width:70px" %)**1**
210 |(% style="width:94px" %)Value|(% style="width:68px" %)Sensor Model|(% style="width:80px" %)Firmware Version|(% style="width:86px" %)Frequency Band|(% style="width:61px" %)Sub-band
211
212 [[image:image-20230203133803-4.png]]
213
214
215 * (% style="color:#037691" %)**Sensor Model:**(%%) For LMDS120, this value is 0x18
216
217 * (% style="color:#037691" %)**Firmware Version:**(%%) 0x0100, Means: v1.0.0 version
218
219 * (% style="color:#037691" %)**Frequency Band:**
220
221 0x01: EU868
222
223 0x02: US915
224
225 0x03: IN865
226
227 0x04: AU915
228
229 0x05: KZ865
230
231 0x06: RU864
232
233 0x07: AS923
234
235 0x08: AS923-1
236
237 0x09: AS923-2
238
239 0x0a: AS923-3
240
241 0x0b: AS923-4
242
243
244 * (% style="color:#037691" %)**Sub-Band**(%%)**:**
245 ** AU915 and US915:value 0x00 ~~ 0x08
246 ** CN470: value 0x0B ~~ 0x0C
247 ** Other Bands: Always 0x00
248
249 === 2.3.2  Distance, Uplink FPORT~=2 ===
250
251
252 LMDS120 will send this uplink **after** Device Status once join the LoRaWAN network successfully. And LMDS120 will:
253
254 1. periodically send this uplink every 20 minute (TDC time), this interval [[can be changed>>||anchor="H3.1A0SetTransmitIntervalTime280x0129"]].
255 1. send this uplink while there is [[interrupt event>>||anchor="H3.2A0SetInterruptMode280x0629"]].
256
257 Uplink Payload totals 8 bytes.
258
259 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:400px" %)
260 |=(% colspan="6" style="width: 400px;background-color:#4F81BD;color:white" %)**Distance Value, FPORT=2**
261 |(% style="width:60px" %)**Size(bytes)**|(% style="width:40px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**1**|(% style="width:100px" %)**2**|(% style="width:80px" %)**1**
262 |(% 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
263
264 [[image:image-20230203142732-5.png]]
265
266
267 (((
268 (% style="color:blue" %)**Distance:**
269 )))
270
271 (((
272 Distance between sensor probe to the first object. (unit: mm)
273 )))
274
275 (((
276 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) = 3526 (D) = 3526 mm.**
277 )))
278
279
280 (((
281 (% style="color:red" %)**Notice: The distance has a special value :**
282 )))
283
284 (((
285 (% style="color:blue" %)**0x3FFF**(%%): Reading Invalid (exceed the valid range of the probe) or Probe not detected.
286 )))
287
288
289 === 2.3.3  Decoder in TTN V3 ===
290
291
292 [[image:1655261164557-670.png]]
293
294
295 (((
296 Please check the decoder from this link: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
297 )))
298
299
300 == 2.4  ​Show data on Datacake ==
301
302
303 (((
304 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:
305
306
307 )))
308
309 (((
310 (% style="color:blue" %)**Step 1**(%%)**: **Link TTNv3 to [[DATACAKE>>url:https://datacake.co/]]
311 )))
312
313 (((
314 (% style="color:blue" %)**Step 2**(%%)**: **Configure LMDS120 in Datacake
315 )))
316
317
318 [[image:image-20230203150230-6.png]]
319
320
321 [[image:image-20220615163646-7.png]]
322
323
324 [[image:image-20230203150402-8.png]]
325
326
327 [[image:image-20230203150513-9.png]]
328
329 (% style="display:none" %) (%%)
330
331 [[image:image-20230203150531-10.png]](% style="display:none" %)
332
333
334 (% style="display:none" %)
335
336 (% style="display:none" %) (%%) [[image:image-20230203150555-11.png]]
337
338
339 (% style="display:none" %)
340
341 = 3.  Configure LMDS120 via AT Command or LoRaWAN Downlink =
342
343
344 (((
345 (((
346 Use can configure LMDS120 via AT Command or LoRaWAN Downlink.
347 )))
348 )))
349
350 * (((
351 (((
352 AT Command Connection: See [[FAQ>>||anchor="H5.A0FAQ"]].
353 )))
354 )))
355 * (((
356 (((
357 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
358 )))
359 )))
360
361 (((
362 (((
363
364 )))
365
366 (((
367 There are two kinds of commands to configure LMDS120, they are:
368 )))
369 )))
370
371 * (((
372 (((
373 (% style="color:#4f81bd" %)** General Commands**.
374 )))
375 )))
376
377 (((
378 (((
379 These commands are to configure:
380 )))
381 )))
382
383 * (((
384 (((
385 General system settings like: uplink interval.
386 )))
387 )))
388 * (((
389 (((
390 LoRaWAN protocol & radio related command.
391 )))
392 )))
393
394 (((
395 (((
396 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]]
397 )))
398 )))
399
400 (((
401 (((
402
403 )))
404 )))
405
406 * (((
407 (((
408 (% style="color:#4f81bd" %)** Commands special design for LMDS120**
409 )))
410 )))
411
412 (((
413 (((
414 These commands only valid for LMDS120, as below:
415 )))
416 )))
417
418
419 == 3.1  Set Transmit Interval Time(0x01) ==
420
421
422 Feature: Change LoRaWAN End Node Transmit Interval.
423
424 (% style="color:#037691" %)**AT Command: AT+TDC**
425
426 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
427 |=(% style="width: 156px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 137px;background-color:#4F81BD;color:white" %)**Function**|=(% style="background-color:#4F81BD;color:white" %)**Response**
428 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
429 30000
430 OK
431 the interval is 30000ms = 30s
432 )))
433 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
434 OK
435 Set transmit interval to 60000ms = 60 seconds
436 )))
437
438 (((
439 (% style="color:#037691" %)**Downlink Command: 0x01**
440 )))
441
442 Format: Command Code (0x01) followed by 3 bytes time value.
443
444 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
445
446 **Example 1:** Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
447
448 **Example 2: **Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
449
450
451 == 3.2  Set Interrupt Mode(0x06) ==
452
453
454 (((
455 Feature, Set Interrupt mode for GPIO_EXIT.
456 )))
457
458 (((
459 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
460 )))
461
462 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
463 |=(% style="width: 154px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 196px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 160px;background-color:#4F81BD;color:white" %)**Response**
464 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
465 0
466 OK
467 the mode is 0 = No interruption
468 )))
469 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
470 Set Transmit Interval
471 ~1. (Disable Interrupt),
472 2. (Trigger by rising and falling edge)
473 3. (Trigger by falling edge)
474 4. (Trigger by rising edge)
475 )))|(% style="width:157px" %)OK
476
477 (% style="color:#037691" %)**Downlink Command: 0x06**
478
479 Format: Command Code (0x06) followed by 3 bytes.
480
481 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
482
483 **Example 1: **Downlink Payload: 06000000  ~/~/ Turn off interrupt mode
484
485 **Example 2:** Downlink Payload: 06000003  ~/~/ Set the interrupt mode to rising edge trigger
486
487 == 3.3 Get or set the maximum detection distance(since v1.1) ==
488
489
490 Feature,The farthest detection distance can be set to 5m, 10m.
491
492 (% style="color:blue" %)**AT Command: AT+SMDD**
493
494 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
495 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
496 |(% style="width:154px" %)AT+SMDD=?|(% style="width:196px" %)Displays the current distance parameter|(% style="width:157px" %)(((
497 5
498 OK
499 )))
500 |(% style="width:154px" %)AT+SMDD=10|(% style="width:196px" %)(((
501 Set detection distance:
502 5:detection distance is 5m
503
504 10:detection distance is 10m
505 )))|(% style="width:157px" %)(((
506 01 08 01 (% style="color:blue" %)**00**(%%) 81 8a
507
508 OK
509
510 00~-~-->successes
511
512 01~-~-->fail
513 )))
514
515 (% style="color:blue" %)**Downlink Command: 0xB3**
516
517 Format: Command Code (0xB3) followed by 1 bytes.
518
519 If the downlink payload=B30A, it means that the distance mode of the end node is set to 0x0A=10 (distance of 10m) and the type code is B3.
520
521 * Example 1: Downlink Payload: B3 05  ~/~/ Set the measuring distance to 5m
522
523 * Example 2: Downlink Payload: B3 0A  ~/~/ Set the measuring distance to 10m
524
525 == 3.4 Get or set the accuracy level(since v1.1) ==
526
527
528 Feature,Accuracy can be set to: 10mm , 5mm,  2mm.
529
530 (% style="color:blue" %)**AT Command: AT+SAL**
531
532 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
533 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
534 |(% style="width:154px" %)AT+SAL=?|(% style="width:196px" %)Displays the current accuracy parameters|(% style="width:157px" %)(((
535 2
536 OK
537 )))
538 |(% style="width:154px" %)AT+SAL=1|(% style="width:196px" %)(((
539 Set accuracy level:
540
541 0: 10mm
542
543 1:5mm
544
545 2:2mm
546 )))|(% style="width:157px" %)(((
547 01 0d 01 (% style="color:blue" %)**00**(%%) 91 8b
548
549 OK
550
551 00~-~-->successes
552
553 01~-~-->fail
554 )))
555
556 (% style="color:blue" %)**Downlink Command: 0xB4**
557
558 Format: Command Code (0xB4) followed by 1 bytes.
559
560 If the downlink payload=B400, it means that the precision of the terminal node is set to 0x00=10 (10mm precision) and the type code is B4.
561
562 * Example 1: Downlink Payload: B4 00  ~/~/ Accuracy of 10mm
563 * Example 2: Downlink Payload: B4 01  ~/~/ Accuracy of 5mm
564 * Example 3: Downlink Payload: B4 02  ~/~/ Accuracy of 2mm
565
566 (% style="color:red" %)**Note: When the node's accuracy is set to 2mm, the node automatically modifies the maximum detection distance to 2.5m.**
567
568
569 == 3.5 Get or set the speed level(since v1.1) ==
570
571
572 Feature,Sampling speed can be set to: fast, normal, slow.
573
574 (% style="color:blue" %)**AT Command: AT+SSL**
575
576 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
577 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
578 |(% style="width:154px" %)AT+SSL=?|(% style="width:196px" %)Displays the current sampling rate|(% style="width:157px" %)(((
579 1
580 OK
581 )))
582 |(% style="width:154px" %)AT+SSL=1|(% style="width:196px" %)(((
583 Set speed level:
584
585 0: slower
586
587 1:ordinary
588
589 2:fastest
590 )))|(% style="width:157px" %)(((
591
592
593 OK
594 )))
595
596 (% style="color:blue" %)**Downlink Command: 0xB4**
597
598 Format: Command Code (0xB5) followed by 1 bytes.
599
600 If the downlink payload=B501, it means that the sampling speed of the terminal node is set to 0x01=1 (Sampling Speed: Normal) and the type code is B5.
601
602 * Example 1: Downlink Payload: B5 00  ~/~/ Sampling speed: slow
603 * Example 2: Downlink Payload: B5 01  ~/~/ Sampling speed: normal
604 * Example 3: Downlink Payload: B5 02  ~/~/ Sampling speed: fast
605
606 == 3.6 Get or Set Command delay of sensors 1(since v1.1) ==
607
608
609 Feature,the response delay of the sensor can be set.
610
611 (% style="color:blue" %)**AT Command: AT+CD1EL**
612
613 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
614 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
615 |(% style="width:154px" %)AT+CD1EL=?|(% style="width:196px" %)Get the current delay time ( ms)|(% style="width:157px" %)(((
616 500
617 OK
618 )))
619 |(% style="width:154px" %)AT+CD1EL=500|(% style="width:196px" %)(((
620 Set command delay
621 )))|(% style="width:157px" %)(((
622 OK
623 )))
624
625 (% style="color:blue" %)**Downlink Command: 0xB6**
626
627 Format: Command Code (0xB6) followed by 2 bytes.
628
629 If the downlink payload=B601F4, it means that the sampling speed of the terminal node is set to 0x01 F4 (Response delay: 500) and the type code is B6.
630
631 * Example : Downlink Payload: B6 01 F4  ~/~/ Set the current delay time to: 500ms
632
633 (% style="color:red" %)**Note:**
634
635 (% style="color:red" %)**This delay command is the key to whether or not the maximum collection distance of the node can be modified successfully: the following are the recommended settings for the two distances:**
636
637 (% style="color:red" %)*** Maximum sampling distance: 5m, can be set to: 500ms delay**
638
639 (% style="color:red" %)*** Maximum sampling distance: 10m, can be set to: 1000ms delay**
640
641 (% style="color:red" %)**When the setting is unsuccessful with AT command, the serial port will return invalid data: ff od bl bd 00 00, ff means the modification is invalid.**
642
643
644 == 3.7 Get or Set Command delay of sensors 2(since v1.1) ==
645
646
647 Feature,the response delay of the sensor can be set.
648
649 (% style="color:blue" %)**AT Command: AT+CD2EL**
650
651 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
652 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
653 |(% style="width:154px" %)AT+CD2EL=?|(% style="width:196px" %)Get the current delay time ( ms)|(% style="width:157px" %)(((
654 1000
655 OK
656 )))
657 |(% style="width:154px" %)AT+CD2EL=1000|(% style="width:196px" %)(((
658 Set command delay
659 )))|(% style="width:157px" %)(((
660 OK
661 )))
662
663 (% style="color:blue" %)**Downlink Command: 0xB7**
664
665 Format: Command Code (0xB7) followed by 2 bytes.
666
667 If the downlink payload=B703E8, it means that the sampling speed of the terminal node is set to 0x03 E8 (Response delay: 1000) and the type code is B7.
668
669 * Example : Downlink Payload: B7 03 E8  ~/~/ Set the current delay time to: 1000ms
670
671 (% style="color:red" %)**Note:**
672
673 (% style="color:red" %)**This delay command is the key to successfully modifying the node's maximum acquisition distance: the following are the recommended settings for the two distances:**
674
675 (% style="color:red" %)*** Maximum Sampling Distance: 5 meters with 2000ms delay.**
676
677 (% style="color:red" %)*** Maximum Sampling Distance: 10 meters, can be set to 3000ms delay.**
678
679 (% style="color:red" %)**If the AT command is not successful, the serial port will return invalid data: ff od bl bd 00 00, ff means the modification is invalid.**
680
681
682 == 3.8 Query sensor parameters(since v1.1) ==
683
684
685 Features, query the maximum detection distance, accuracy, sampling speed parameters of the sensor   
686
687 (% style="color:blue" %)**AT Command: AT+DQUE**
688
689 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
690 |=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
691 |(% style="width:154px" %)AT+DQUE|(% style="width:196px" %)Get the maximum detection distance, accuracy, and sampling speed parameters.|(% style="width:157px" %)(((
692 01 88 04 01 01 00 00 b4 b4
693
694 OK
695 )))
696
697 (% style="color:blue" %)**Downlink Command: 0xB8**
698
699 Format: Command Code (0xB8) followed by 1 bytes.
700
701 If the downlink payload=B801, it means that the sampling speed of the terminal node is set to 0x01,  and the type code is B8.
702
703 * Example : Downlink Payload: B8 01  ~/~/ Get the maximum detection distance, accuracy, and sampling speed parameters.
704
705 Returns data parsing:
706
707 * 01 ~-~--> Frame header
708 * 88 ~-~--> Function code
709 * 04 ~-~--> Total bytes of returned data
710 * 01 ~-~--> Maximum detection distance is: 10m. (Return 00, then maximum detection distance is: 5
711 * 01 ~-~--> Detection speed is: normal. (00: fastest; 01: normal; 02: slower)
712 * 00 ~-~--> Accuracy is: 10mm. (00: 10mm; 1: 5mm, 2: 2mm)
713 * 00 ~-~--> Condensation function is: weaker. (00: weaker; 01: normal; 02: stronger)
714 * B4 B4 ~-~--> Checksum
715
716 = 4. Battery & Power Consumption =
717
718
719 LMDS120 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
720
721 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
722
723
724 = 5.  FAQ =
725
726 == 5.1  How to use AT Command to configure LMDS120 ==
727
728
729 LMDS120 UART connection photo
730
731 [[image:image-20230203155404-15.png||height="433" width="690"]]
732
733
734 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.
735
736 [[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" height="571" width="767"]]
737
738
739 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:
740
741 [[image:image-20220615180555-4.png||height="620" width="887"]]
742
743
744 == 5.2  How to upgrade the firmware? ==
745
746
747 (((
748 A new firmware might be available for:
749 )))
750
751 * (((
752 Support new features
753 )))
754 * (((
755 For bug fix
756 )))
757 * (((
758 Change LoRaWAN bands.
759 )))
760
761 (((
762 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]]
763 )))
764
765 (((
766 Firmware location: [[https:~~/~~/www.dropbox.com/sh/vxhj7k0utq5dk4a/AAC-DW1UeeWSnSPeG-lHWg4da?dl=0>>https://www.dropbox.com/sh/vxhj7k0utq5dk4a/AAC-DW1UeeWSnSPeG-lHWg4da?dl=0]]
767 )))
768
769
770 == 5.3  How to change the LoRa Frequency Bands/Region ==
771
772
773 You can follow the instructions for [[how to upgrade image>>||anchor="H5.2A0Howtoupgradethefirmware3F"]].
774 When downloading the images, choose the required image file for download. ​
775
776
777 == 5.4 Why does the LMDS120 get invalid data? ==
778
779
780 By default, The latest firmware value of POWERIC is 0, versions after 3322 require POWERIC to be set to 1 to work properly
781
782
783 * **//1. Check if the hardware version is 3322//**
784
785 If the sensor hardware version is 3322 or earlier, the user can change the POWERIC value to 0, If the sensor hardware is later than 3322, the user can change the value of POWERIC to 1.
786
787 **a. Using AT command**
788
789 (% class="box infomessage" %)
790 (((
791 AT+POWERIC=0.
792
793 AT+POWERIC=1.
794 )))
795
796
797 **b. Using Downlink**
798
799 (% class="box infomessage" %)
800 (((
801 FF 00(AT+POWERIC=0).
802
803 FF 01(AT+POWERIC=1).
804 )))
805
806
807 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20240531090837-1.png?rev=1.1||alt="image-20240531090837-1.png"]]
808
809
810 Please check your hardware production date
811
812 The first two digits are the week of the year, and the last two digits are the year.
813
814 The number 3322 is the first batch we changed the power IC.
815
816
817 = 6.  Trouble Shooting =
818
819 == 6.1  AT Command input doesn't work ==
820
821
822 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.
823
824
825 = 7.  Order Info =
826
827
828 Part Number **:** (% style="color:blue" %)**LMDS120-XX**
829
830 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
831
832 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
833 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
834 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
835 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
836 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
837 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
838 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
839 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
840
841 = 8. ​ Packing Info =
842
843
844 (((
845 **Package Includes**:
846 )))
847
848 (((
849 * LMDS120 LoRaWAN Microwave Radar Distance Sensor x 1
850 )))
851
852
853
854 = 9.  ​Support =
855
856
857 * 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.
858
859 * 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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