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Version 159.1 by Mengting Qiu on 2023/12/09 18:03
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1 (% style="text-align:center" %)
2 [[image:image-20231110085342-2.png||height="481" width="481"]]
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11 **Table of Contents:(% style="display:none" %) (%%)**
12
13 {{toc/}}
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18
19
20 = 1. Introduction =
21
22 == 1.1 What is LoRaWAN Smart Distance Detector ==
23
24
25 The Dragino (% style="color:blue" %)**DS20L is a smart distance detector**(%%) base on long-range wireless LoRaWAN technology. It uses (% style="color:blue" %)**LiDAR sensor**(%%) to detect the distance between DS20L and object, then DS20L will send the distance data to the IoT Platform via LoRaWAN. DS20L can measure range between 3cm ~~ 200cm.
26
27 DS20L allows users to send data and reach extremely long ranges via LoRaWAN. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current 
28 consumption. It targets professional wireless sensor network applications such smart cities, building automation, and so on.
29
30 DS20L has a (% style="color:blue" %)**built-in 2400mAh non-chargeable battery**(%%) for long-term use up to several years*. Users can also power DS20L with an external power source for (% style="color:blue" %)**continuous measuring and distance alarm / counting purposes.**
31
32 DS20L is fully compatible with (% style="color:blue" %)**LoRaWAN v1.0.3 Class A protocol**(%%), it can work with a standard LoRaWAN gateway.
33
34
35 [[image:image-20231110102635-5.png||height="402" width="807"]]
36
37
38 == 1.2 ​Features ==
39
40
41 * LoRaWAN Class A protocol
42 * LiDAR distance detector, range 3 ~~ 200cm
43 * Periodically detect or continuously detect mode
44 * AT Commands to change parameters
45 * Remotely configure parameters via LoRaWAN Downlink
46 * Alarm & Counting mode
47 * Firmware upgradable via program port or LoRa protocol
48 * Built-in 2400mAh battery or power by external power source
49
50 == 1.3 Specification ==
51
52
53 (% style="color:#037691" %)**LiDAR Sensor:**
54
55 * Operation Temperature: -40 ~~ 80 °C
56 * Operation Humidity: 0~~99.9%RH (no Dew)
57 * Storage Temperature: -10 ~~ 45°C
58 * Measure Range: 3cm~~200cm @ 90% reflectivity
59 * Accuracy: ±2cm @ (3cm~~100cm); ±5% @ (100~~200cm)
60 * ToF FoV: ±9°, Total 18°
61 * Light source: VCSEL
62
63 == 1.4 Power Consumption ==
64
65
66 (% style="color:#037691" %)**Battery Power Mode:**
67
68 * Idle: 0.003 mA @ 3.3v
69 * Max : 360 mA
70
71 (% style="color:#037691" %)**Continuously mode**:
72
73 * Idle: 21 mA @ 3.3v
74 * Max : 360 mA
75
76 = 2. Configure DS20L to connect to LoRaWAN network =
77
78 == 2.1 How it works ==
79
80
81 The DS20L 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 DS20L. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.
82
83 (% style="display:none" %) (%%)
84
85 == 2.2 ​Quick guide to connect to LoRaWAN server (OTAA) ==
86
87
88 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 [[LPS8v2>>url:https://www.dragino.com/products/lora-lorawan-gateway/item/228-lps8v2.html]] as a LoRaWAN gateway in this example.
89
90 The LPS8v2 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.(% style="display:none" %)
91
92 [[image:image-20231110102635-5.png||height="402" width="807"]](% style="display:none" %)
93
94 === Step 1: Create a device in TTN with the OTAA keys from DS20L. ===
95
96 Each DS20L is shipped with a sticker with the default device EUI as below:
97
98 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
99
100
101 You can enter this key in the LoRaWAN Server portal. Below is TTN V3 screenshot:
102
103
104 (% style="color:blue" %)**Register the device**
105
106 [[image:image-20231207144600-2.png||height="703" width="756"]]
107
108
109 (% style="color:blue" %)**Add DevEUI and AppKey**
110
111 [[image:image-20231207145121-5.png||height="540" width="756"]]
112
113
114
115 === Step 2: Activate on DS20L ===
116
117 [[image:image-20231128133704-1.png||height="189" width="441"]]
118
119 Press the button for 5 seconds to activate the DS20L.
120
121 The switch is switched to (% style="color:blue" %)**E** (%%)and the external power supply is used.
122
123 The switch is switched to (% style="color:blue" %)**I** (%%)and the motherboard battery is used for power supply.
124
125 (% 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.
126
127 After join success, it will start to upload messages to TTN and you can see the messages in the panel.
128
129
130
131 == 2.3 ​Uplink Payload ==
132
133 === 2.3.1 Device Status, FPORT~=5 ===
134
135
136 Users can use the downlink command(**0x26 01**) to ask DS20L to send device configure detail, include device configure status. DS20L will uplink a payload via FPort=5 to server.
137
138 The Payload format is as below.
139
140 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
141 |=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
142 **Size(bytes)**
143 )))|=(% style="width: 100px; background-color: #4F81BD;color:white;" %)**1**|=(% style="width: 100px; background-color: #4F81BD;color:white;" %)**2**|=(% style="background-color: #4F81BD;color:white; width: 100px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 100px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 50px;" %)**2**
144 |(% style="width:62.5px" %)Value|(% style="width:110px" %)Sensor Model|(% style="width:48px" %)Firmware Version|(% style="width:94px" %)Frequency Band|(% style="width:91px" %)Sub-band|(% style="width:60px" %)BAT
145
146 Example parse in TTNv3
147
148 [[image:image-20231206151412-3.png||height="179" width="1070"]]
149
150 (% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x21
151
152 (% style="color:blue" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version
153
154 (% style="color:blue" %)**Frequency Band**:
155
156 0x01: EU868
157
158 0x02: US915
159
160 0x03: IN865
161
162 0x04: AU915
163
164 0x05: KZ865
165
166 0x06: RU864
167
168 0x07: AS923
169
170 0x08: AS923-1
171
172 0x09: AS923-2
173
174 0x0a: AS923-3
175
176 0x0b: CN470
177
178 0x0c: EU433
179
180 0x0d: KR920
181
182 0x0e: MA869
183
184 (% style="color:blue" %)**Sub-Band**:
185
186 AU915 and US915:value 0x00 ~~ 0x08
187
188 CN470: value 0x0B ~~ 0x0C
189
190 Other Bands: Always 0x00
191
192 (% style="color:blue" %)**Battery Info**:
193
194 Check the battery voltage.
195
196 Ex1: 0x0B45 = 2885mV
197
198 Ex2: 0x0B49 = 2889mV
199
200
201 === 2.3.2 Uplink Payload, FPORT~=2 ===
202
203
204 ==== (% style="color:red" %)**AT+MOD~=1**(%%) ====
205
206 Regularly detect distance and report. When the distance exceeds the limit, the alarm flag is set to 1, and the report can be triggered by external interrupts.
207
208 Uplink Payload totals 10 bytes.
209
210 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
211 |(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:30px" %)**2**|(% style="background-color:#4f81bd; color:white; width:130px" %)**1**|(% style="background-color:#4f81bd; color:white; width:70px" %)**2**|(% style="background-color:#4f81bd; color:white; width:100px" %)**1**|(% style="background-color:#4f81bd; color:white; width:120px" %)**4**
212 |(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+ Alarm+Interrupt|(% style="width:74px" %)Distance|(% style="width:100px" %)Sensor State|(% style="width:119px" %)Interrupt Count
213
214 [[image:image-20231209152917-1.png||height="300" width="1172"]]
215
216 (% style="color:blue" %)**Battery Info:**
217
218 Check the battery voltage for DS20L
219
220 Ex1: 0x0E10 = 3600mV
221
222
223 (% style="color:blue" %)**MOD & Alarm & Interrupt:**
224
225 (% style="color:red" %)**MOD:**
226
227 **Example: ** (0x60>>6) & 0x3f =1
228
229 **0x01:**  Regularly detect distance and report.
230 **0x02: ** Uninterrupted measurement (external power supply).
231
232 (% style="color:red" %)**Alarm:**
233
234 When the detection distance exceeds the limit, the alarm flag is set to 1.
235
236 (% style="color:red" %)**Interrupt:**
237
238 Whether it is an external interrupt.
239
240
241 (% style="color:blue" %)**Distance info:**
242
243 **Example**:
244
245 If payload is: 0708H: distance = 0708H = 1800 mm
246
247
248 (% style="color:blue" %)**Sensor State:**
249
250 Ex1: 0x00: Normal collection distance
251
252 Ex2 0x0x: Distance collection is wrong
253
254
255 (% style="color:blue" %)**Interript Count:**
256
257 If payload is:000007D0H: count = 07D0H =2000
258
259
260
261 ==== (% style="color:red" %)**AT+MOD~=2**(%%)** ** ====
262
263
264 The power consumption of uninterrupted measurement is high, and the device needs to use external power supply.(The switch is switched to E and the external power supply is used.)
265
266 [[image:image-20231128133704-1.png||height="189" width="441"]]
267
268
269 * **Set over-limit alarm mode: AT+DOL=3,500,244,**(% style="color:red" %)0(%%)**,120**
270
271 (% class="wikigeneratedid" id="HUninterruptedmeasurement.Whenthedistanceexceedsthelimit2CtheoutputIOissethighandreportsarereportedeveryfiveminutes.Thetimecanbesetandpoweredbyanexternalpowersupply.UplinkPayloadtotals11bytes." %)
272 Uninterrupted measurement. When the distance exceeds the limit, the output IO high, instant alarm. Uplink Payload totals 9 bytes.
273
274 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
275 |(% style="background-color:#4f81bd; color:white; width:70px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:40px" %)**2**|(% style="background-color:#4f81bd; color:white; width:130px" %)**1**|(% style="background-color:#4f81bd; color:white; width:130px" %)**2**|(% style="background-color:#4f81bd; color:white; width:70px" %)**2**|(% style="background-color:#4f81bd; color:white; width:70px" %)**2**
276 |(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+Alarm+Do+Limit flag|(% style="width:74px" %)Distance |(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit
277
278 [[image:image-20231209171127-3.png||height="374" width="1209"]]
279
280 (% style="color:blue" %)**MOD & Alarm & Do & Limit flag:**
281
282 (% style="color:red" %)**MOD:**
283
284 **Example: ** (0x60>>6) & 0x3f =1
285
286 **0x01:**  Regularly detect distance and report.
287 **0x02: ** Uninterrupted measurement (external power supply).
288
289 (% style="color:red" %)**Alarm:**
290
291 When the detection distance exceeds the limit, the alarm flag is set to 1.
292
293 (% style="color:red" %)**Do:**
294
295 When the distance exceeds the set threshold, pull the Do pin high.
296
297 (% style="color:red" %)**Limit flag:**
298
299 Mode for setting threshold: **0~~3**
300
301 **0:** does not use upper and lower limits
302
303 **1:** Use upper and lower limits
304
305 **2:** Less than the upper limit
306
307 **3: **Greater than the lower limit
308
309
310 (% style="color:blue" %)**Distance:**
311
312 Actual sampling distance values.
313
314
315 (% style="color:blue" %)**Upper limit:**
316
317 The upper limit of the threshold cannot exceed 2000mm.
318
319
320 (% style="color:blue" %)**Lower limit:**
321
322 The lower limit of the threshold cannot be less than 3mm.
323
324
325 * **Set the person or object count mode: AT+DOL=1,500,244,**(% style="color:red" %)1(%%)**,120**
326
327 Continuous measurement, detect and count people or things passing by in distance limit mode.
328
329 [[image:image-20231209173457-5.png||height="277" width="1098"]]
330
331
332
333
334 == 2.4 Decode payload in The Things Network ==
335
336
337 While using TTN network, you can add the payload format to decode the payload.
338
339 [[image:image-20231206143515-1.png||height="534" width="759"]]
340
341
342 (((
343 The payload decoder function for TTN is here:
344 )))
345
346 (((
347 DS20L TTN Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
348 )))
349
350
351 == 2.5 ​Show Data in DataCake IoT Server ==
352
353
354 (((
355 [[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:
356 )))
357
358
359 (((
360 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
361 )))
362
363 (((
364 (% 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:**
365 )))
366
367
368 [[image:image-20231207153532-6.png||height="562" width="861"]]
369
370
371 [[image:image-20231207155940-8.png]]
372
373 For more detailed instructions, refer to the following instructions: [[Welcome - Datacake Docs>>url:https://docs.datacake.de/]]
374
375 [[image:image-20231207160733-11.png||height="429" width="759"]]
376
377
378 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
379
380 (% style="color:blue" %)**Step 4**(%%)**: Search the DS20L and add DevEUI.**
381
382 [[image:image-20231207160343-10.png||height="665" width="705"]]
383
384
385 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
386
387 [[image:image-20231129100454-2.png||height="501" width="928"]]
388
389
390 == 2.6 Frequency Plans ==
391
392
393 The DS20L 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.
394
395 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
396
397
398 = 3. Configure DS20L =
399
400 == 3.1 Configure Methods ==
401
402
403 DS20L supports below configure method:
404
405 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
406
407 * AT Command via UART Connection : See [[UART Connection>>http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
408
409 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
410
411 == 3.2 General Commands ==
412
413
414 These commands are to configure:
415
416 * General system settings like: uplink interval.
417
418 * LoRaWAN protocol & radio related command.
419
420 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
421
422 [[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/]]
423
424
425 == 3.3 Commands special design for DS20L ==
426
427
428 These commands only valid for DS20L, as below:
429
430
431 === 3.3.1 Set Transmit Interval Time ===
432
433
434 (((
435 Feature: Change LoRaWAN End Node Transmit Interval.
436 )))
437
438 (((
439 (% style="color:blue" %)**AT Command: AT+TDC**
440 )))
441
442 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
443 |=(% 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**
444 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
445 30000
446 OK
447 the interval is 30000ms = 30s
448 )))
449 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
450 OK
451 Set transmit interval to 60000ms = 60 seconds
452 )))
453
454 (((
455 (% style="color:blue" %)**Downlink Command: 0x01**
456 )))
457
458 (((
459 Format: Command Code (0x01) followed by 3 bytes time value.
460 )))
461
462 (((
463 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
464 )))
465
466 * (((
467 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
468 )))
469 * (((
470 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
471
472
473
474 )))
475
476 === 3.3.2 Set Interrupt Mode ===
477
478
479 Feature, Set Interrupt mode for pin of GPIO_EXTI.
480
481 When AT+INTMOD=0 is set, GPIO_EXTI is used as a digital input port.
482
483 (% style="color:blue" %)**AT Command: AT+INTMOD**
484
485 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
486 |=(% 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**
487 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
488 0
489 OK
490 the mode is 0 =Disable Interrupt
491 )))
492 |(% style="width:154px" %)(((
493 AT+INTMOD=3
494
495 (default)
496 )))|(% style="width:196px" %)(((
497 Set Transmit Interval
498 0. (Disable Interrupt),
499 ~1. (Trigger by rising and falling edge)
500 2. (Trigger by falling edge)
501 3. (Trigger by rising edge)
502 )))|(% style="width:157px" %)OK
503
504 (% style="color:blue" %)**Downlink Command: 0x06**
505
506 Format: Command Code (0x06) followed by 3 bytes.
507
508 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
509
510 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
511
512 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
513
514 === 3.3.3 Set work mode ===
515
516
517 Feature: Switch working mode
518
519 (% style="color:blue" %)**AT Command: AT+MOD**
520
521 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
522 |=(% style="width: 162px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 193px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Response**
523 |(% style="width:162px" %)AT+MOD=?|(% style="width:191px" %)Get the current working mode.|(% style="width:106px" %)OK
524 |(% style="width:162px" %)AT+MOD=1|(% style="width:191px" %)Set the working mode to Regular measurements.|(% style="width:106px" %)(((
525 OK
526 Attention:Take effect after ATZ
527 )))
528
529 (% style="color:blue" %)**Downlink Command:**
530
531 * **Example: **0x0A01 ~/~/  Same as AT+MOD=1
532
533 * **Example:** 0x0A02  ~/~/  Same as AT+MOD=2
534
535 === 3.3.4 Set threshold and threshold mode ===
536
537
538 Feature, Set threshold and threshold mode
539
540 When (% style="color:#037691" %)**AT+DOL=0,0,0,0,400**(%%) is set, No threshold is used, the sampling time is 400ms.
541
542 (% style="color:blue" %)**AT Command: AT+DOL**
543
544 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
545 |(% style="background-color:#4f81bd; color:white; width:162px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:240px" %)**Function**|(% style="background-color:#4f81bd; color:white; width:108px" %)**Response**
546 |(% style="width:172px" %)AT+ DOL =?|(% style="width:279px" %)Get the current threshold mode and sampling time|(% style="width:118px" %)(((
547 0,0,0,0,400
548 OK
549 )))
550 |(% style="width:172px" %)AT+ DOL =1,1800,100,0,400|(% style="width:279px" %)Set only the upper and lower thresholds|(% style="width:118px" %)OK
551
552 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
553 |(% rowspan="11" style="color:blue; width:120px" %)(((
554
555
556
557
558
559
560
561
562
563
564
565 **AT+DOL=5,1800,0,0,400**
566 )))|(% rowspan="4" style="width:240px" %)(((
567
568
569
570
571
572
573 The first bit sets the limit mode
574 )))|(% style="width:150px" %)0: Do not use upper and lower limits
575 |(% style="width:251px" %)1: Use upper and lower limits
576 |(% style="width:251px" %)2:Less than the upper limit
577 |(% style="width:251px" %)3: Greater than the lower limit
578 |(% style="width:226px" %)The second bit sets the upper limit value|(% style="width:251px" %)3~~2000MM
579 |(% style="width:226px" %)The third bit sets the lower limit value|(% style="width:251px" %)3~~2000MM
580 |(% rowspan="2" style="width:226px" %)The fourth bit sets the over-limit alarm or person or object count.|(% style="width:251px" %)0 Over-limit alarm, DO output is high
581 |(% style="width:251px" %)1 Person or object counting statistics
582 |(% style="width:226px" %)The fifth bit sets the sampling time|(% style="width:251px" %)(((
583 100~~10000ms
584
585
586 )))
587
588 (% style="color:blue" %)**Downlink Command: 0x07**
589
590 Format: Command Code (0x07) followed by 9 bytes.
591
592 If the downlink payload=**07 01 0708 0064 00 0190**, it means set the END Node's limit mode to 0x01,upper limit value to 0x0708=1800(mm), lower limit value to 0x0064=100(mm), to over-limit alarm(0x00) ,the sampling time to 0x0190=400(ms), while type code is 0x07.
593
594 * Example 0: Downlink Payload: 07 00 0000 0000 00 0190  **~-~-->**  AT+MOD=0,0,0,0,400
595
596 * Example 1: Downlink Payload: 070107080064000190  **~-~-->**  AT+MOD=1,1800,100,0,400
597
598 * Example 2: Downlink Payload: 070200000064000190  **~-~-->**  AT+MOD=2,1800100,0,400
599
600 * Example 3: Downlink Payload: 070300000064000190  **~-~-->**  AT+MOD=3,0,100,0,400
601
602 = 4. Battery & Power Consumption =
603
604
605 DS20L use built-in 2400mAh non-chargeable battery for long-term use up to several years*. See below link for detail information about the battery info and how to replace.
606
607 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
608
609
610 = 5. OTA Firmware update =
611
612
613 (% class="wikigeneratedid" %)
614 User can change firmware DS20L to:
615
616 * Change Frequency band/ region.
617
618 * Update with new features.
619
620 * Fix bugs.
621
622 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/zqv1vt3komgp4tu/AAC33PnXIcWOVl_UXBEAeT_xa?dl=0]]**
623
624 Methods to Update Firmware:
625
626 * (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/]]**
627
628 * 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]]**.
629
630 = 6. FAQ =
631
632 == 6.1 What is the frequency plan for DS20L? ==
633
634
635 DS20L 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"]]
636
637
638 == 6.2 DS20L programming line ==
639
640
641 缺图 后续补上
642
643 feature:
644
645 for AT commands
646
647 Update the firmware of DS20L
648
649 Support interrupt mode
650
651
652 == 6.3 LiDAR probe position ==
653
654
655 [[image:1701155390576-216.png||height="285" width="307"]]
656
657 The black oval hole in the picture is the LiDAR probe.
658
659
660 == 6.4 Interface definition ==
661
662 [[image:image-20231128151132-2.png||height="305" width="557"]]
663
664
665 = 7. Trouble Shooting =
666
667 == 7.1 AT Command input doesn't work ==
668
669
670 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.
671
672
673 == 7.2 Significant error between the output distant value of LiDAR and actual distance ==
674
675
676 (((
677 (% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance. (such as glass and water, etc.)
678 )))
679
680 (((
681 (% style="color:red" %)**Troubleshooting**(%%): Please avoid use of this product under such circumstance in practice.
682 )))
683
684
685 (((
686 (% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
687 )))
688
689 (((
690 (% style="color:red" %)**Troubleshooting**(%%): please use dry dust-free cloth to gently remove the foreign matter.
691 )))
692
693
694 = 8. Order Info =
695
696
697 Part Number: (% style="color:blue" %)**DS20L-XXX**
698
699 (% style="color:red" %)**XXX**(%%): **The default frequency band**
700
701 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
702
703 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
704
705 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
706
707 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
708
709 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
710
711 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
712
713 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
714
715 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
716
717 = 9. ​Packing Info =
718
719
720 (% style="color:#037691" %)**Package Includes**:
721
722 * DS20L LoRaWAN Smart Distance Detector x 1
723
724 (% style="color:#037691" %)**Dimension and weight**:
725
726 * Device Size: cm
727
728 * Device Weight: g
729
730 * Package Size / pcs : cm
731
732 * Weight / pcs : g
733
734 = 10. Support =
735
736
737 * 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.
738
739 * 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.cc>>mailto:Support@dragino.cc]].