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Version 171.3 by Mengting Qiu on 2023/12/12 11:48
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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 (% style="color:#037691" %)**LiDAR Sensor:**
53
54 * Operation Temperature: -40 ~~ 80 °C
55 * Operation Humidity: 0~~99.9%RH (no Dew)
56 * Storage Temperature: -10 ~~ 45°C
57 * Measure Range: 3cm~~200cm @ 90% reflectivity
58 * Accuracy: ±2cm @ (3cm~~100cm); ±5% @ (100~~200cm)
59 * ToF FoV: ±9°, Total 18°
60 * Light source: VCSEL
61
62 == 1.4 Power Consumption ==
63
64
65 (% style="color:#037691" %)**Battery Power Mode:**
66
67 * Idle: 3uA @ 3.3v
68 * Max : 360 mA
69
70 (% style="color:#037691" %)**Continuously mode**:
71
72 * Idle: 21 mA @ 3.3v
73 * Max : 360 mA
74
75 == 1.5 Use Case ==
76
77 (% class="mark" %)**Regular Distance Detect**
78
79 [[image:image-20231211220922-1.png||height="352" width="605"]]
80
81
82 (% class="mark" %)**Counting / Alarm**
83
84 [[image:image-20231211221253-2.png]]
85
86
87 [[image:image-20231211221436-3.png]]
88
89
90 = 2. Configure DS20L to connect to LoRaWAN network =
91
92 == 2.1 How it works ==
93
94
95 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.
96
97 (% style="display:none" %) (%%)
98
99 == 2.2 ​Quick guide to connect to LoRaWAN server (OTAA) ==
100
101
102 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.
103
104 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" %)
105
106 [[image:image-20231110102635-5.png||height="402" width="807"]](% style="display:none" %)
107
108 === Step 1: Create a device in TTN with the OTAA keys from DS20L. ===
109
110 Each DS20L is shipped with a sticker with the default device EUI as below:
111
112 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
113
114
115 You can enter this key in the LoRaWAN Server portal. Below is TTN V3 screenshot:
116
117
118 (% style="color:blue" %)**Register the device**
119
120 [[image:image-20231207144600-2.png||height="703" width="756"]]
121
122
123 (% style="color:blue" %)**Add DevEUI and AppKey**
124
125 [[image:image-20231207145121-5.png||height="540" width="756"]]
126
127
128
129 === Step 2: Activate DS20L ===
130
131 [[image:image-20231128133704-1.png||height="189" width="441"]]
132
133 Press the button for 5 seconds to activate the DS20L.
134
135 The switch is switched to (% style="color:blue" %)**E** (%%)and the external power supply is used.
136
137 The switch is switched to (% style="color:blue" %)**I** (%%)and DS20L will be power by the built-in battery.
138
139 (% 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.
140
141 After join success, it will start to upload messages to TTN and you can see the messages in the panel.
142
143
144
145 == 2.3 ​Uplink Payload ==
146
147 === 2.3.1 Device Status, FPORT~=5 ===
148
149
150 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.
151
152 The Payload format is as below.
153
154 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
155 |=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
156 **Size(bytes)**
157 )))|=(% 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**
158 |(% 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
159
160 Example parse in TTNv3
161
162 [[image:image-20231206151412-3.png||height="179" width="1070"]]
163
164 (% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x21
165
166 (% style="color:blue" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version
167
168 (% style="color:blue" %)**Frequency Band**:
169
170 0x01: EU868
171
172 0x02: US915
173
174 0x03: IN865
175
176 0x04: AU915
177
178 0x05: KZ865
179
180 0x06: RU864
181
182 0x07: AS923
183
184 0x08: AS923-1
185
186 0x09: AS923-2
187
188 0x0a: AS923-3
189
190 0x0b: CN470
191
192 0x0c: EU433
193
194 0x0d: KR920
195
196 0x0e: MA869
197
198 (% style="color:blue" %)**Sub-Band**:
199
200 AU915 and US915:value 0x00 ~~ 0x08
201
202 CN470: value 0x0B ~~ 0x0C
203
204 Other Bands: Always 0x00
205
206 (% style="color:blue" %)**Battery Info**:
207
208 Check the battery voltage.
209
210 Ex1: 0x0B45 = 2885mV
211
212 Ex2: 0x0B49 = 2889mV
213
214
215 === 2.3.2 Uplink Payload, FPORT~=2 ===
216
217
218 ==== (% style="color:red" %)**AT+MOD~=1**(%%) ====
219
220 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.
221
222 **Uplink Payload totals 10 bytes.**
223
224 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
225 |(% 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**
226 |(% 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
227
228 **MOD+ Alarm+ Interrupt:**
229
230 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:400px" %)
231 |(% style="background-color:#4f81bd; color:White; width:50px" %)**Size(bit)**|(% style="background-color:#4f81bd; color:White; width:60px" %)**[bit7:bit6]**|(% style="background-color:#4f81bd; color:White; width:70px" %)**bit5**|(% style="background-color:#4f81bd; color:White; width:120px" %)**bit4**
232 |(% style="width:80px" %)Value|(% style="width:80px" %)MOD|(% style="width:89px" %)Digital Interrupt
233 |(% style="width:167px" %)(((
234 Distance Alarm
235
236 0: No Alarm;
237
238 1: Alarm
239 )))
240
241 Example parse in TTNv3
242
243 [[image:image-20231209152917-1.png||height="300" width="1172"]]
244
245 (% style="color:blue" %)**Battery Info:**
246
247 Check the battery voltage for DS20L
248
249 Ex1: 0x0E10 = 3600mV
250
251
252 (% style="color:blue" %)**MOD & Alarm & Interrupt:**
253
254 (% style="color:red" %)**MOD:**
255
256 **Example: ** (0x60>>6) & 0x3f =1
257
258 **0x01:**  Regularly detect distance and report.
259 **0x02: ** Uninterrupted measurement (external power supply).
260
261 (% style="color:red" %)**Alarm:**
262
263 When the detection distance exceeds the limit, the alarm flag is set to 1.
264
265 (% style="color:red" %)**Interrupt:**
266
267 Whether it is an external interrupt.
268
269
270 (% style="color:blue" %)**Distance info:**
271
272 **Example**:
273
274 If payload is: 0708H: distance = 0708H = 1800 mm
275
276
277 (% style="color:blue" %)**Sensor State:**
278
279 Ex1: 0x00: Distance Reading is valid
280
281 Ex2: 0x0x: Distance Reading is invalid
282
283
284 (% style="color:blue" %)**Interrupt Count:**
285
286 If payload is:000007D0H: count = 07D0H =2000
287
288
289
290 ==== (% style="color:red" %)**AT+MOD~=2**(%%)** ** ====
291
292
293 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.)
294
295 [[image:image-20231128133704-1.png||height="189" width="441"]]
296
297
298 * **Set over-limit alarm mode: AT+DOL=3,500,244,**(% style="color:red" %)0(%%)**,120**
299
300 (% class="wikigeneratedid" id="HUninterruptedmeasurement.Whenthedistanceexceedsthelimit2CtheoutputIOissethighandreportsarereportedeveryfiveminutes.Thetimecanbesetandpoweredbyanexternalpowersupply.UplinkPayloadtotals11bytes." %)
301 Uninterrupted measurement. When the distance exceeds the limit, the output IO high, instant alarm.
302
303 (% class="wikigeneratedid" %)
304 **Uplink Payload totals 9 bytes.**
305
306 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:680px" %)
307 |(% 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**
308 |(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:210px" %)MOD+ DO+ Alarm+ DO flag+ Limit flag|(% style="width:74px" %)Distance |(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit
309
310 **MOD+DO+ Alarm+ Do flag+ Limit flag:**
311
312 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:680px" %)
313 |(% style="background-color:#4f81bd; color:white; width:50px" %)**Size(bit)**|(% style="background-color:#4f81bd; color:white; width:60px" %)**[bit7:bit6]**|(% style="background-color:#4f81bd; color:white; width:90px" %)**bit5**|(% style="background-color:#4f81bd; color:white; width:90px" %)**bit4**|(% style="background-color:#4f81bd; color:white; width:120px" %)**bit3**|(% style="background-color:#4f81bd; color:white; width:100px" %)**[bit2:bit1:bit0]**
314 |(% style="width:50px" %)Value|(% style="width:60px" %)MOD|(% style="width:89px" %)(((
315 (((
316 DO
317 )))
318
319 (((
320 0：Within limit
321
322 1：Out of limit
323 )))
324 )))|(% style="width:73px" %)(((
325 Alarm
326
327 0: No Alarm;
328
329 1: Alarm
330 )))|(% style="width:150px" %)(((
331 DO flag
332
333 0：the over-limit alarm mode
334
335 1：the person or object count mode
336 )))|(% style="width:103px" %)Limit flag
337 (0~~3)
338
339 Example parse in TTNv3
340
341 [[image:image-20231209171127-3.png||height="374" width="1209"]]
342
343 (% style="color:blue" %)**MOD & Alarm & Do & Limit flag:**
344
345 (% style="color:red" %)**MOD:**
346
347 **Example: ** (0x60>>6) & 0x3f =1
348
349 **0x01:**  Regularly detect distance and report.
350 **0x02: ** Uninterrupted measurement (external power supply).
351
352 (% style="color:red" %)**Alarm:**
353
354 When the detection distance exceeds the limit, the alarm flag is set to 1.
355
356 (% style="color:red" %)**DO:**
357
358 Shows the DO pin status, while there is alarm trigger, The DO pin will be set to high (3.3v), It will be set to 0 low level when there is no alarm.
359
360 (% style="color:red" %)**Threshold Flag for Alarm:**
361
362 Mode for setting threshold: **0~~3**
363
364 **0:** Distance limit range is not enabled, alarm:0.
365
366 **1:** Trigger Alarm if distance exceed the range between lower and upper.
367
368 **2:** Trigger Alarm if distance smaller than the upper limit.
369
370 **3: **Trigger Alarm if distance bigger than the lower limit .
371
372
373 (% style="color:blue" %)**Distance:**
374
375 Actual sampling distance values.
376
377 **Example:**
378
379 **AT+DOL=1,500,244,**(% style="color:red" %)0(%%)**,120  **
380
381 The distance is detected every 120ms.
382
383 When the actual detection value is within the range of [244mm,500mm], the data is uploaded in the normal TDC time.
384
385 When the actual detection value is outside the range of [244mm,500mm], the uplink data will be immediately alerted.
386
387 If payload is: 0708H: distance = 0708H = 1800 mm
388
389
390 (% style="color:blue" %)**Upper limit:**
391
392 Show the pre-set upper limit in Hex, Unit: mm.
393
394 Ex: 01F4(H)=500mm
395
396
397 (% style="color:blue" %)**Lower limit:**
398
399 Show the pre-set lower limit in Hex, Unit: mm.
400
401 Ex: 0xF4(H)=244mm
402
403
404 * **Set the person or object count mode: AT+DOL=1,500,244,**(% style="color:red" %)1(%%)**,120**
405
406 Continuous measurement, detect and count people or things passing by in distance limit mode.
407
408 **Uplink Payload totals 11 bytes.**
409
410 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:680px" %)
411 |(% 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" %)**4**|(% style="background-color:#4f81bd; color:white; width:70px" %)**2**|(% style="background-color:#4f81bd; color:white; width:70px" %)**2**
412 |(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:210px" %)MOD+ DO+ Alarm+ DO flag+ Limit flag|(% style="width:176px" %)Distance limit alarm count|(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit
413
414 **MOD+DO+ Alarm+ Do flag+ Limit flag:**
415
416 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:680px" %)
417 |(% style="background-color:#4f81bd; color:white; width:50px" %)**Size(bit)**|(% style="background-color:#4f81bd; color:white; width:60px" %)**[bit7:bit6]**|(% style="background-color:#4f81bd; color:white; width:90px" %)**bit5**|(% style="background-color:#4f81bd; color:white; width:90px" %)**bit4**|(% style="background-color:#4f81bd; color:white; width:120px" %)**bit3**|(% style="background-color:#4f81bd; color:white; width:100px" %)**[bit2:bit1:bit0]**
418 |(% style="width:50px" %)Value|(% style="width:60px" %)MOD|(% style="width:89px" %)(((
419 (((
420 DO
421 )))
422
423 (((
424 0：Within limit
425
426 1：Out of limit
427 )))
428 )))|(% style="width:73px" %)(((
429 Alarm
430
431 0: No Alarm;
432
433 1: Alarm
434 )))|(% style="width:150px" %)(((
435 DO flag
436
437 0：the over-limit alarm mode
438
439 1：the person or object count mode
440 )))|(% style="width:103px" %)Limit flag
441 (0~~3)
442
443 Example parse in TTNv3
444
445 [[image:image-20231209173457-5.png||height="277" width="1098"]]
446
447 (% style="color:blue" %)**MOD & Alarm & Do & Limit flag:**
448
449 (% style="color:red" %)**MOD:**
450
451 **Example: ** (0x60>>6) & 0x3f =1
452
453 **0x01:**  Regularly detect distance and report.
454 **0x02: ** Uninterrupted measurement (external power supply).
455
456 (% style="color:red" %)**Alarm:**
457
458 When the detection distance exceeds the limit, the alarm flag is set to 1.
459
460 (% style="color:red" %)**Do:**
461
462 Shows the DO pin status, while there is alarm trigger, The DO pin will be set to high (3.3v), It will be set to 0 low level when there is no alarm.
463
464 (% style="color:red" %)**Threshold Flag for Alarm:**
465
466 Mode for setting threshold: **0~~3**
467
468 **0:** does not use upper and lower limits
469
470 **1:** Use upper and lower limits
471
472 **2:** Less than the upper limit
473
474 **3: **Greater than the lower limit
475
476
477 (% style="color:blue" %)**Distance limit alarm count:**
478
479 People or objects are collected and counted within a limited distance.
480
481 The detection of a stationary person or object at each sampling time will be repeated three times, and the fourth sampling count will be added by 1.
482
483 **Example:**
484
485 **AT+DOL=1,500,244,**(% style="color:red" %)1(%%)**,120   **
486
487 People or objects passing within the distance range of [244mm,500mm] are detected and counted every 120ms.
488
489 If payload is: 0x56H, interrupt count =0x56H =86
490
491
492 (% style="color:blue" %)**Upper limit:**
493
494 Show the pre-set upper limit in Hex, Unit: mm.
495
496 Ex: 01F4(H)=500mm
497
498
499 (% style="color:blue" %)**Lower limit:**
500
501 Show the pre-set lower limit in Hex, Unit: mm.
502
503 Ex: 0xF4(H)=244mm
504
505
506 == 2.4 Decode payload in The Things Network ==
507
508
509 While using TTN network, you can add the payload format to decode the payload.
510
511 [[image:image-20231206143515-1.png||height="534" width="759"]]
512
513
514 (((
515 The payload decoder function for TTN is here:
516 )))
517
518 (((
519 DS20L TTN Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
520 )))
521
522
523 == 2.5 ​Show Data in DataCake IoT Server ==
524
525
526 (((
527 [[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, onhuman-friendlya in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
528 )))
529
530
531 (((
532 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
533 )))
534
535 (((
536 (% 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:**
537 )))
538
539
540 [[image:image-20231207153532-6.png||height="562" width="861"]]
541
542
543 [[image:image-20231207155940-8.png]]
544
545 For more detailed instructions, refer to the following instructions: [[Welcome - Datacake Docs>>url:https://docs.datacake.de/]]
546
547 [[image:image-20231207160733-11.png||height="429" width="759"]]
548
549
550 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
551
552 (% style="color:blue" %)**Step 4**(%%)**: Search the DS20L and add DevEUI.**
553
554 [[image:image-20231207160343-10.png||height="665" width="705"]]
555
556
557 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
558
559 [[image:image-20231129100454-2.png||height="501" width="928"]]
560
561
562 == 2.6 Frequency Plans ==
563
564
565 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.
566
567 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
568
569
570 = 3. Configure DS20L =
571
572 == 3.1 Configure Methods ==
573
574
575 DS20L supports below configure method:
576
577 * 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]].
578
579 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
580
581
582 == 3.2 General Commands ==
583
584
585 These commands are to configure:
586
587 * General system settings like: uplink interval.
588
589 * LoRaWAN protocol & radio related command.
590
591 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
592
593 [[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/]]
594
595
596 == 3.3 Commands special design for DS20L ==
597
598
599 Below commands only valid for DS20L, as below:
600
601
602 === 3.3.1 Set Transmit Interval Time ===
603
604
605 (((
606 Feature: Change LoRaWAN End Node Transmit Interval.
607 )))
608
609 (((
610 (% style="color:blue" %)**AT Command: AT+TDC**
611 )))
612
613 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
614 |=(% 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**
615 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
616 30000
617 OK
618 the interval is 30000ms = 30s
619 )))
620 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
621 OK
622 Set transmit interval to 60000ms = 60 seconds
623 )))
624
625 (((
626 (% style="color:blue" %)**Downlink Command: 0x01**
627 )))
628
629 (((
630 Format: Command Code (0x01) followed by 3 bytes time value.
631 )))
632
633 (((
634 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
635 )))
636
637 * (((
638 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
639 )))
640 * (((
641 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
642
643
644
645 )))
646
647 === 3.3.2 Set Interrupt Mode ===
648
649
650 Feature, Set Interrupt mode for pin of GPIO_EXTI.
651
652 When AT+INTMOD=0 is set, GPIO_EXTI is used as a digital input port.
653
654 (% style="color:blue" %)**AT Command: AT+INTMOD**
655
656 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
657 |=(% 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**
658 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
659 0
660 OK
661 the mode is 0 =Disable Interrupt
662 )))
663 |(% style="width:154px" %)(((
664 AT+INTMOD=3
665
666 (default)
667 )))|(% style="width:196px" %)(((
668 Set Transmit Interval
669 0. (Disable Interrupt),
670 ~1. (Trigger by rising and falling edge)
671 2. (Trigger by falling edge)
672 3. (Trigger by rising edge)
673 )))|(% style="width:157px" %)OK
674
675 (% style="color:blue" %)**Downlink Command: 0x06**
676
677 Format: Command Code (0x06) followed by 3 bytes.
678
679 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
680
681 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
682
683 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
684
685 === 3.3.3 Set work mode ===
686
687
688 Feature: Switch working mode
689
690 (% style="color:blue" %)**AT Command: AT+MOD**
691
692 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
693 |=(% 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**
694 |(% style="width:162px" %)AT+MOD=?|(% style="width:191px" %)Get the current working mode.|(% style="width:106px" %)OK
695 |(% style="width:162px" %)AT+MOD=1|(% style="width:191px" %)Set the working mode to Regular measurements.|(% style="width:106px" %)(((
696 OK
697 Attention:Take effect after ATZ
698 )))
699
700 (% style="color:blue" %)**Downlink Command:**
701
702 * **Example: **0x0A01 ~/~/  Same as AT+MOD=1
703
704 * **Example:** 0x0A02  ~/~/  Same as AT+MOD=2
705
706 === 3.3.4 Set threshold and threshold mode ===
707
708
709 Feature, Set threshold and threshold mode
710
711 When (% style="color:#037691" %)**AT+DOL=0,0,0,0,400**(%%) is set, No threshold is used, the sampling time is 400ms.
712
713 (% style="color:blue" %)**AT Command: AT+DOL**
714
715 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
716 |(% 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**
717 |(% style="width:172px" %)AT+ DOL =?|(% style="width:279px" %)Get the current threshold mode and sampling time|(% style="width:118px" %)(((
718 0,0,0,0,400
719 OK
720 )))
721 |(% style="width:172px" %)AT+ DOL =1,1800,100,0,400|(% style="width:279px" %)Set only the upper and lower thresholds|(% style="width:118px" %)OK
722
723 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
724 |=(% 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" %) Parameter
725 |(% rowspan="11" style="color:blue; width:120px" %)(((
726
727
728
729
730
731
732
733
734
735
736
737 **AT+DOL=1,1800,3,0,400**
738 )))|(% rowspan="4" style="width:240px" %)(((
739
740
741
742
743 The first bit sets the limit mode
744 )))|(% style="width:150px" %)0: Do not use upper and lower limits
745 |(% style="width:251px" %)1: Use upper and lower limits
746 |(% style="width:251px" %)2:Less than the upper limit
747 |(% style="width:251px" %)3: Greater than the lower limit
748 |(% style="width:226px" %)The second bit sets the upper limit value|(% style="width:251px" %)3~~2000MM
749 |(% style="width:226px" %)The third bit sets the lower limit value|(% style="width:251px" %)3~~2000MM
750 |(% 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
751 |(% style="width:251px" %)1 Person or object counting statistics
752 |(% style="width:226px" %)The fifth bit sets the sampling time|(% style="width:251px" %)(((
753 100~~10000ms
754
755
756 )))
757
758 (% style="color:blue" %)**Downlink Command: 0x07**
759
760 Format: Command Code (0x07) followed by 9 bytes.
761
762 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.
763
764 * Example 0: Downlink Payload: 07 00 0000 0000 00 0190  **~-~-->**  AT+MOD=0,0,0,0,400
765
766 * Example 1: Downlink Payload: 070107080064000190  **~-~-->**  AT+MOD=1,1800,100,0,400
767
768 * Example 2: Downlink Payload: 070200000064000190  **~-~-->**  AT+MOD=2,1800,100,0,400
769
770 * Example 3: Downlink Payload: 070300000064000190  **~-~-->**  AT+MOD=3,0,100,0,400
771
772 (% style="color:Red" %)**Note: The over-limit alarm is applied to MOD1 and MOD2.**
773
774 **For example:**
775
776 * **AT+MOD=1**
777
778 **AT+DOL=1,500,244,**(% style="color:blue" %)0(%%)**,300**
779
780 Send data according to the normal TDC time. If the mode limit is exceeded, the alarm flag is set to 1:
781
782 [[image:image-20231211113204-2.png||height="292" width="1093"]]
783
784 * **AT+MOD=2  **
785
786 **AT+DOL=1,500,244,**(% style="color:blue" %)0(%%)**,300**
787
788 If the mode limit is exceeded, the data is immediately uplink and the alarm flag is set to 1:
789
790 [[image:image-20231211114932-3.png||height="277" width="1248"]]
791
792
793
794
795
796 = 4. Battery & Power Consumption =
797
798
799 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.
800
801 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
802
803
804 = 5. OTA Firmware update =
805
806
807 (% class="wikigeneratedid" %)
808 User can change firmware DS20L to:
809
810 * Change Frequency band/ region.
811
812 * Update with new features.
813
814 * Fix bugs.
815
816 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/zqv1vt3komgp4tu/AAC33PnXIcWOVl_UXBEAeT_xa?dl=0]]**
817
818 Methods to Update Firmware:
819
820 * (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/]]**
821
822 * 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]]**.
823
824 = 6. FAQ =
825
826 == 6.1 What is the frequency plan for DS20L? ==
827
828
829 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"]]
830
831
832 == 6.2 DS20L programming line ==
833
834
835 缺图 后续补上
836
837 feature:
838
839 for AT commands
840
841 Update the firmware of DS20L
842
843 Support interrupt mode
844
845
846 == 6.3 LiDAR probe position ==
847
848
849 [[image:1701155390576-216.png||height="285" width="307"]]
850
851 The black oval hole in the picture is the LiDAR probe.
852
853
854 == 6.4 Interface definition ==
855
856 [[image:image-20231128151132-2.png||height="305" width="557"]]
857
858
859 = 7. Trouble Shooting =
860
861 == 7.1 AT Command input doesn't work ==
862
863
864 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.
865
866
867 == 7.2 Significant error between the output distant value of LiDAR and actual distance ==
868
869
870 (((
871 (% 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.)
872 )))
873
874 (((
875 (% style="color:red" %)**Troubleshooting**(%%): Please avoid use of this product under such circumstance in practice.
876 )))
877
878
879 (((
880 (% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
881 )))
882
883 (((
884 (% style="color:red" %)**Troubleshooting**(%%): please use dry dust-free cloth to gently remove the foreign matter.
885 )))
886
887
888 = 8. Order Info =
889
890
891 Part Number: (% style="color:blue" %)**DS20L-XXX**
892
893 (% style="color:red" %)**XXX**(%%): **The default frequency band**
894
895 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
896
897 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
898
899 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
900
901 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
902
903 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
904
905 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
906
907 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
908
909 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
910
911 = 9. ​Packing Info =
912
913
914 (% style="color:#037691" %)**Package Includes**:
915
916 * DS20L LoRaWAN Smart Distance Detector x 1
917
918 (% style="color:#037691" %)**Dimension and weight**:
919
920 * Device Size: cm
921
922 * Device Weight: g
923
924 * Package Size / pcs : cm
925
926 * Weight / pcs : g
927
928 = 10. Support =
929
930
931 * 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.
932
933 * 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]].