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Version 162.1 by Mengting Qiu on 2023/12/11 11:49
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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 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:600px" %)
330 |(% 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**
331 |(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+Alarm+Do+Limit flag|(% style="width:176px" %)Distance Limit Alarm count|(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit
332
333 [[image:image-20231209173457-5.png||height="277" width="1098"]]
334
335
336
337
338 == 2.4 Decode payload in The Things Network ==
339
340
341 While using TTN network, you can add the payload format to decode the payload.
342
343 [[image:image-20231206143515-1.png||height="534" width="759"]]
344
345
346 (((
347 The payload decoder function for TTN is here:
348 )))
349
350 (((
351 DS20L TTN Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
352 )))
353
354
355 == 2.5 ​Show Data in DataCake IoT Server ==
356
357
358 (((
359 [[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:
360 )))
361
362
363 (((
364 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
365 )))
366
367 (((
368 (% 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:**
369 )))
370
371
372 [[image:image-20231207153532-6.png||height="562" width="861"]]
373
374
375 [[image:image-20231207155940-8.png]]
376
377 For more detailed instructions, refer to the following instructions: [[Welcome - Datacake Docs>>url:https://docs.datacake.de/]]
378
379 [[image:image-20231207160733-11.png||height="429" width="759"]]
380
381
382 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
383
384 (% style="color:blue" %)**Step 4**(%%)**: Search the DS20L and add DevEUI.**
385
386 [[image:image-20231207160343-10.png||height="665" width="705"]]
387
388
389 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
390
391 [[image:image-20231129100454-2.png||height="501" width="928"]]
392
393
394 == 2.6 Frequency Plans ==
395
396
397 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.
398
399 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
400
401
402 = 3. Configure DS20L =
403
404 == 3.1 Configure Methods ==
405
406
407 DS20L supports below configure method:
408
409 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
410
411 * 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]].
412
413 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
414
415 == 3.2 General Commands ==
416
417
418 These commands are to configure:
419
420 * General system settings like: uplink interval.
421
422 * LoRaWAN protocol & radio related command.
423
424 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
425
426 [[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/]]
427
428
429 == 3.3 Commands special design for DS20L ==
430
431
432 These commands only valid for DS20L, as below:
433
434
435 === 3.3.1 Set Transmit Interval Time ===
436
437
438 (((
439 Feature: Change LoRaWAN End Node Transmit Interval.
440 )))
441
442 (((
443 (% style="color:blue" %)**AT Command: AT+TDC**
444 )))
445
446 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
447 |=(% 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**
448 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
449 30000
450 OK
451 the interval is 30000ms = 30s
452 )))
453 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
454 OK
455 Set transmit interval to 60000ms = 60 seconds
456 )))
457
458 (((
459 (% style="color:blue" %)**Downlink Command: 0x01**
460 )))
461
462 (((
463 Format: Command Code (0x01) followed by 3 bytes time value.
464 )))
465
466 (((
467 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
468 )))
469
470 * (((
471 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
472 )))
473 * (((
474 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
475
476
477
478 )))
479
480 === 3.3.2 Set Interrupt Mode ===
481
482
483 Feature, Set Interrupt mode for pin of GPIO_EXTI.
484
485 When AT+INTMOD=0 is set, GPIO_EXTI is used as a digital input port.
486
487 (% style="color:blue" %)**AT Command: AT+INTMOD**
488
489 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
490 |=(% 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**
491 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
492 0
493 OK
494 the mode is 0 =Disable Interrupt
495 )))
496 |(% style="width:154px" %)(((
497 AT+INTMOD=3
498
499 (default)
500 )))|(% style="width:196px" %)(((
501 Set Transmit Interval
502 0. (Disable Interrupt),
503 ~1. (Trigger by rising and falling edge)
504 2. (Trigger by falling edge)
505 3. (Trigger by rising edge)
506 )))|(% style="width:157px" %)OK
507
508 (% style="color:blue" %)**Downlink Command: 0x06**
509
510 Format: Command Code (0x06) followed by 3 bytes.
511
512 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
513
514 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
515
516 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
517
518 === 3.3.3 Set work mode ===
519
520
521 Feature: Switch working mode
522
523 (% style="color:blue" %)**AT Command: AT+MOD**
524
525 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
526 |=(% 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**
527 |(% style="width:162px" %)AT+MOD=?|(% style="width:191px" %)Get the current working mode.|(% style="width:106px" %)OK
528 |(% style="width:162px" %)AT+MOD=1|(% style="width:191px" %)Set the working mode to Regular measurements.|(% style="width:106px" %)(((
529 OK
530 Attention:Take effect after ATZ
531 )))
532
533 (% style="color:blue" %)**Downlink Command:**
534
535 * **Example: **0x0A01 ~/~/  Same as AT+MOD=1
536
537 * **Example:** 0x0A02  ~/~/  Same as AT+MOD=2
538
539 === 3.3.4 Set threshold and threshold mode ===
540
541
542 Feature, Set threshold and threshold mode
543
544 When (% style="color:#037691" %)**AT+DOL=0,0,0,0,400**(%%) is set, No threshold is used, the sampling time is 400ms.
545
546 (% style="color:blue" %)**AT Command: AT+DOL**
547
548 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
549 |(% 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**
550 |(% style="width:172px" %)AT+ DOL =?|(% style="width:279px" %)Get the current threshold mode and sampling time|(% style="width:118px" %)(((
551 0,0,0,0,400
552 OK
553 )))
554 |(% style="width:172px" %)AT+ DOL =1,1800,100,0,400|(% style="width:279px" %)Set only the upper and lower thresholds|(% style="width:118px" %)OK
555
556 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
557 |(% rowspan="11" style="color:blue; width:120px" %)(((
558
559
560
561
562
563
564
565
566
567
568
569 **AT+DOL=5,1800,0,0,400**
570 )))|(% rowspan="4" style="width:240px" %)(((
571
572
573
574
575
576
577 The first bit sets the limit mode
578 )))|(% style="width:150px" %)0: Do not use upper and lower limits
579 |(% style="width:251px" %)1: Use upper and lower limits
580 |(% style="width:251px" %)2:Less than the upper limit
581 |(% style="width:251px" %)3: Greater than the lower limit
582 |(% style="width:226px" %)The second bit sets the upper limit value|(% style="width:251px" %)3~~2000MM
583 |(% style="width:226px" %)The third bit sets the lower limit value|(% style="width:251px" %)3~~2000MM
584 |(% 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
585 |(% style="width:251px" %)1 Person or object counting statistics
586 |(% style="width:226px" %)The fifth bit sets the sampling time|(% style="width:251px" %)(((
587 100~~10000ms
588
589
590 )))
591
592 (% style="color:blue" %)**Downlink Command: 0x07**
593
594 Format: Command Code (0x07) followed by 9 bytes.
595
596 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.
597
598 * Example 0: Downlink Payload: 07 00 0000 0000 00 0190  **~-~-->**  AT+MOD=0,0,0,0,400
599
600 * Example 1: Downlink Payload: 070107080064000190  **~-~-->**  AT+MOD=1,1800,100,0,400
601
602 * Example 2: Downlink Payload: 070200000064000190  **~-~-->**  AT+MOD=2,1800100,0,400
603
604 * Example 3: Downlink Payload: 070300000064000190  **~-~-->**  AT+MOD=3,0,100,0,400
605
606 = 4. Battery & Power Consumption =
607
608
609 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.
610
611 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
612
613
614 = 5. OTA Firmware update =
615
616
617 (% class="wikigeneratedid" %)
618 User can change firmware DS20L to:
619
620 * Change Frequency band/ region.
621
622 * Update with new features.
623
624 * Fix bugs.
625
626 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/zqv1vt3komgp4tu/AAC33PnXIcWOVl_UXBEAeT_xa?dl=0]]**
627
628 Methods to Update Firmware:
629
630 * (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/]]**
631
632 * 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]]**.
633
634 = 6. FAQ =
635
636 == 6.1 What is the frequency plan for DS20L? ==
637
638
639 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"]]
640
641
642 == 6.2 DS20L programming line ==
643
644
645 缺图 后续补上
646
647 feature:
648
649 for AT commands
650
651 Update the firmware of DS20L
652
653 Support interrupt mode
654
655
656 == 6.3 LiDAR probe position ==
657
658
659 [[image:1701155390576-216.png||height="285" width="307"]]
660
661 The black oval hole in the picture is the LiDAR probe.
662
663
664 == 6.4 Interface definition ==
665
666 [[image:image-20231128151132-2.png||height="305" width="557"]]
667
668
669 = 7. Trouble Shooting =
670
671 == 7.1 AT Command input doesn't work ==
672
673
674 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.
675
676
677 == 7.2 Significant error between the output distant value of LiDAR and actual distance ==
678
679
680 (((
681 (% 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.)
682 )))
683
684 (((
685 (% style="color:red" %)**Troubleshooting**(%%): Please avoid use of this product under such circumstance in practice.
686 )))
687
688
689 (((
690 (% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
691 )))
692
693 (((
694 (% style="color:red" %)**Troubleshooting**(%%): please use dry dust-free cloth to gently remove the foreign matter.
695 )))
696
697
698 = 8. Order Info =
699
700
701 Part Number: (% style="color:blue" %)**DS20L-XXX**
702
703 (% style="color:red" %)**XXX**(%%): **The default frequency band**
704
705 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
706
707 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
708
709 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
710
711 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
712
713 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
714
715 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
716
717 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
718
719 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
720
721 = 9. ​Packing Info =
722
723
724 (% style="color:#037691" %)**Package Includes**:
725
726 * DS20L LoRaWAN Smart Distance Detector x 1
727
728 (% style="color:#037691" %)**Dimension and weight**:
729
730 * Device Size: cm
731
732 * Device Weight: g
733
734 * Package Size / pcs : cm
735
736 * Weight / pcs : g
737
738 = 10. Support =
739
740
741 * 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.
742
743 * 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]].