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Last modified by Mengting Qiu on 2023/12/14 11:15
From version 113.8
edited by Xiaoling
on 2023/11/10 10:23
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To version 125.1
edited by Xiaoling
on 2023/11/29 08:52
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Summary

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... ... @@ -22,7 +22,7 @@
22 22  == 1.1 What is LoRaWAN Smart Distance Detector ==
23 23  
24 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.
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 26  
27 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 28  consumption. It targets professional wireless sensor network applications such smart cities, building automation, and so on.
... ... @@ -31,9 +31,8 @@
31 31  
32 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 33  
34 -DS20L supports (% style="color:blue" %)**Datalog feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
35 35  
36 -[[image:image-20231110091506-4.png||height="391" width="768"]]
35 +[[image:image-20231110102635-5.png||height="402" width="807"]]
37 37  
38 38  
39 39  == 1.2 ​Features ==
... ... @@ -45,10 +45,11 @@
45 45  * AT Commands to change parameters
46 46  * Remotely configure parameters via LoRaWAN Downlink
47 47  * Alarm & Counting mode
48 -* Datalog Feature
49 49  * Firmware upgradable via program port or LoRa protocol
50 50  * Built-in 2400mAh battery or power by external power source
51 51  
50 +
51 +
52 52  == 1.3 Specification ==
53 53  
54 54  
... ... @@ -63,9 +63,22 @@
63 63  * Light source: VCSEL
64 64  
65 65  
66 -(% style="display:none" %)
67 67  
67 +== 1.4 Power Consumption ==
68 68  
69 +
70 +(% style="color:#037691" %)**Battery Power Mode:**
71 +
72 +* Idle: 0.003 mA @ 3.3v
73 +* Max : 360 mA
74 +
75 +(% style="color:#037691" %)**Continuously mode**:
76 +
77 +* Idle: 21 mA @ 3.3v
78 +* Max : 360 mA
79 +
80 +
81 +
69 69  = 2. Configure DS20L to connect to LoRaWAN network =
70 70  
71 71  == 2.1 How it works ==
... ... @@ -80,11 +80,10 @@
80 80  
81 81  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.
82 82  
83 -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.
96 +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" %)
84 84  
85 -[[image:image-20231110091447-3.png||height="383" width="752"]](% style="display:none" %)
98 +[[image:image-20231110102635-5.png||height="402" width="807"]](% style="display:none" %)
86 86  
87 -
88 88  (% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DS20L.
89 89  
90 90  Each DS20L is shipped with a sticker with the default device EUI as below:
... ... @@ -118,6 +118,7 @@
118 118  
119 119  (% style="color:blue" %)**Step 2:**(%%) Activate on DS20L
120 120  
133 +[[image:image-20231128133704-1.png||height="189" width="441"]]
121 121  
122 122  Press the button for 5 seconds to activate the DS20L.
123 123  
... ... @@ -143,9 +143,9 @@
143 143  
144 144  Example parse in TTNv3
145 145  
146 -[[image:image-20230805103904-1.png||height="131" width="711"]]
159 +[[image:1701149922873-259.png]]
147 147  
148 -(% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x24
161 +(% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x21
149 149  
150 150  (% style="color:blue" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version
151 151  
... ... @@ -199,138 +199,121 @@
199 199  === 2.3.2 Uplink Payload, FPORT~=2 ===
200 200  
201 201  
202 -(((
203 -DS20L will send this uplink **after** Device Status once join the LoRaWAN network successfully. And DS20L will:
215 +==== (% style="color:red" %)**MOD~=1**(%%) ====
204 204  
205 -periodically send this uplink every 20 minutes, this interval [[can be changed>>||anchor="H3.3.1SetTransmitIntervalTime"]].
217 +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.
206 206  
207 -Uplink Payload totals 11 bytes.
208 -)))
219 +Uplink Payload totals 10 bytes.
209 209  
210 210  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
211 -|=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
212 -**Size(bytes)**
213 -)))|=(% style="width: 30px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 80px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**2**|=(% style="background-color:#4F81BD;color:white; width: 80px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 70px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 70px;" %)**1**
214 -|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="HBatteryInfo"]]|(% style="width:62.5px" %)(((
215 -[[Temperature DS18B20>>||anchor="HDS18B20Temperaturesensor"]]
216 -)))|[[Distance>>||anchor="HDistance"]]|[[Distance signal strength>>||anchor="HDistancesignalstrength"]]|(% style="width:122px" %)(((
217 -[[Interrupt flag & Interrupt_level>>||anchor="HInterruptPin26A0InterruptLevel"]]
218 -)))|(% style="width:54px" %)[[LiDAR temp>>||anchor="HLiDARtemp"]]|(% style="width:96px" %)(((
219 -[[Message Type>>||anchor="HMessageType"]]
220 -)))
222 +|(% 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**
223 +|(% 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
221 221  
222 -[[image:image-20230805104104-2.png||height="136" width="754"]]
225 +[[image:1701155076393-719.png]]
223 223  
227 +(% style="color:blue" %)**Battery Info:**
224 224  
225 -==== (% style="color:blue" %)**Battery Info**(%%) ====
229 +Check the battery voltage for DS20L
226 226  
231 +Ex1: 0x0E10 = 3600mV
227 227  
228 -Check the battery voltage for DS20L.
229 229  
230 -Ex1: 0x0B45 = 2885mV
234 +(% style="color:blue" %)**MOD & Alarm & Interrupt:**
231 231  
232 -Ex2: 0x0B49 = 2889mV
236 +(% style="color:red" %)**MOD:**
233 233  
238 +**Example: ** (0x60>>6) & 0x3f =1
234 234  
235 -==== (% style="color:blue" %)**DS18B20 Temperature sensor**(%%) ====
240 +**0x01:**  Regularly detect distance and report.
241 +**0x02: ** Uninterrupted measurement (external power supply).
236 236  
243 +(% style="color:red" %)**Alarm:**
237 237  
238 -This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
245 +When the detection distance exceeds the limit, the alarm flag is set to 1.
239 239  
247 +(% style="color:red" %)**Interrupt:**
240 240  
241 -**Example**:
249 +Whether it is an external interrupt.
242 242  
243 -If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
244 244  
245 -If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
252 +(% style="color:blue" %)**Distance info:**
246 246  
247 -
248 -==== (% style="color:blue" %)**Distance**(%%) ====
249 -
250 -
251 -Represents the distance value of the measurement output, the default unit is cm, and the value range parsed as a decimal number is 0-1200. In actual use, when the signal strength value Strength.
252 -
253 -
254 254  **Example**:
255 255  
256 -If the data you get from the register is 0x0B 0xEA, the distance between the sensor and the measured object is 0BEA(H) = 3050 (D)/10 = 305cm.
256 +If payload is: 0708H: distance = 0708H = 1800 mm
257 257  
258 258  
259 -==== (% style="color:blue" %)**Distance signal strength**(%%) ====
259 +(% style="color:blue" %)**Sensor State:**
260 260  
261 +Ex1: 0x00: Normal collection distance
261 261  
262 -Refers to the signal strength, the default output value will be between 0-65535. When the distance measurement gear is fixed, the farther the distance measurement is, the lower the signal strength; the lower the target reflectivity, the lower the signal strength. When Strength is greater than 100 and not equal to 65535, the measured value of Dist is considered credible.
263 +Ex2 0x0x: Distance collection is wrong
263 263  
264 264  
265 -**Example**:
266 +(% style="color:blue" %)**Interript Count:**
266 266  
267 -If payload is: 01D7(H)=471(D), distance signal strength=471, 471>100,471≠65535, the measured value of Dist is considered credible.
268 +If payload is:000007D0H: count = 07D0H =2000
268 268  
269 -Customers can judge whether they need to adjust the environment based on the signal strength.
270 270  
271 271  
272 -**1) When the sensor detects valid data:**
272 +==== (% style="color:red" %)**MOD~=2**(%%)** ** ====
273 273  
274 -[[image:image-20230805155335-1.png||height="145" width="724"]]
274 +Uninterrupted measurement. When the distance exceeds the limit, the output IO is set high and reports are reported every five minutes. The time can be set and powered by an external power supply.Uplink Payload totals 11bytes.
275 275  
276 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
277 +|(% 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**
278 +|(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+Alarm+Do+Limit flag|(% style="width:74px" %)Distance Limit Alarm count|(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit
276 276  
277 -**2) When the sensor detects invalid data:**
280 +[[image:1701155150328-206.png]]
278 278  
279 -[[image:image-20230805155428-2.png||height="139" width="726"]]
282 +(% style="color:blue" %)**MOD & Alarm & Do & Limit flag:**
280 280  
284 +(% style="color:red" %)**MOD:**
281 281  
282 -**3) When the sensor is not connected:**
286 +**Example: ** (0x60>>6) & 0x3f =1
283 283  
284 -[[image:image-20230805155515-3.png||height="143" width="725"]]
288 +**0x01:**  Regularly detect distance and report.
289 +**0x02: ** Uninterrupted measurement (external power supply).
285 285  
291 +(% style="color:red" %)**Alarm:**
286 286  
287 -==== (% style="color:blue" %)**Interrupt Pin & Interrupt Level**(%%) ====
293 +When the detection distance exceeds the limit, the alarm flag is set to 1.
288 288  
295 +(% style="color:red" %)**Do:**
289 289  
290 -This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3.2SetInterruptMode"]] for the hardware and software set up.
297 +When the distance exceeds the set threshold, pull the Do pin high.
291 291  
292 -Note: The Internet Pin is a separate pin in the screw terminal. See [[pin mapping>>||anchor="H1.8PinDefinitions"]] of GPIO_EXTI .
299 +(% style="color:red" %)**Limit flag:**
293 293  
294 -**Example:**
301 +Mode for setting threshold: 0~~5
295 295  
296 -If byte[0]&0x01=0x00 : Normal uplink packet.
303 +0: does not use upper and lower limits
297 297  
298 -If byte[0]&0x01=0x01 : Interrupt Uplink Packet.
305 +1: Use upper and lower limits
299 299  
307 +2: is less than the lower limit value
300 300  
301 -==== (% style="color:blue" %)**LiDAR temp**(%%) ====
309 +3: is greater than the lower limit value
302 302  
311 +4: is less than the upper limit
303 303  
304 -Characterize the internal temperature value of the sensor.
313 +5: is greater than the upper limit
305 305  
306 -**Example: **
307 -If payload is: 1C(H) <<24>>24=28(D),LiDAR temp=28℃.
308 -If payload is: F2(H) <<24>>24=-14(D),LiDAR temp=-14℃.
309 309  
316 +(% style="color:blue" %)**Upper limit:**
310 310  
311 -==== (% style="color:blue" %)**Message Type**(%%) ====
318 +The upper limit of the threshold cannot exceed 2000mm.
312 312  
313 313  
314 -(((
315 -For a normal uplink payload, the message type is always 0x01.
316 -)))
321 +(% style="color:blue" %)**Lower limit:**
317 317  
318 -(((
319 -Valid Message Type:
320 -)))
323 +The lower limit of the threshold cannot be less than 3mm.
321 321  
322 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:499px" %)
323 -|=(% style="width: 161px;background-color:#4F81BD;color:white" %)**Message Type Code**|=(% style="width: 164px;background-color:#4F81BD;color:white" %)**Description**|=(% style="width: 174px;background-color:#4F81BD;color:white" %)**Payload**
324 -|(% style="width:160px" %)0x01|(% style="width:163px" %)Normal Uplink|(% style="width:173px" %)Normal Uplink Payload
325 -|(% style="width:160px" %)0x02|(% style="width:163px" %)Reply configures info|(% style="width:173px" %)Configure Info Payload
326 326  
327 -[[image:image-20230805150315-4.png||height="233" width="723"]]
328 -
329 -
330 330  === 2.3.3 Historical measuring distance, FPORT~=3 ===
331 331  
332 332  
333 -DS20L stores sensor values and users can retrieve these history values via the [[downlink command>>||anchor="H2.5.4Pollsensorvalue"]].
329 +DS20L stores sensor values and users can retrieve these history values via the downlink command.
334 334  
335 335  The historical payload includes one or multiplies entries and every entry has the same payload as Real-Time measuring distance.
336 336  
... ... @@ -458,92 +458,18 @@
458 458  
459 459  After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
460 460  
461 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20220610165129-11.png?width=1088&height=595&rev=1.1||alt="image-20220610165129-11.png"]]
457 +[[image:1701152946067-561.png]]
462 462  
463 463  
464 -== 2.5 Datalog Feature ==
460 +== 2.5 Frequency Plans ==
465 465  
466 466  
467 -Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DS20L will store the reading for future retrieving purposes.
468 -
469 -
470 -=== 2.5.1 Ways to get datalog via LoRaWAN ===
471 -
472 -
473 -Set PNACKMD=1, DS20L will wait for ACK for every uplink, when there is no LoRaWAN network, DS20L will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
474 -
475 -* (((
476 -a) DS20L will do an ACK check for data records sending to make sure every data arrive server.
477 -)))
478 -* (((
479 -b) DS20L will send data in **CONFIRMED Mode** when PNACKMD=1, but DS20L won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if DS20L gets a ACK, DS20L will consider there is a network connection and resend all NONE-ACK messages.
480 -)))
481 -
482 -
483 -
484 -=== 2.5.2 Unix TimeStamp ===
485 -
486 -
487 -DS20L uses Unix TimeStamp format based on
488 -
489 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-11.png?width=627&height=97&rev=1.1||alt="图片-20220523001219-11.png" height="97" width="627"]]
490 -
491 -User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
492 -
493 -Below is the converter example
494 -
495 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-12.png?width=720&height=298&rev=1.1||alt="图片-20220523001219-12.png" height="298" width="720"]]
496 -
497 -
498 -So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
499 -
500 -
501 -=== 2.5.3 Set Device Time ===
502 -
503 -
504 -User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
505 -
506 -Once DS20L Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DS20L. If DS20L fails to get the time from the server, DS20L will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
507 -
508 -(% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.**
509 -
510 -
511 -=== 2.5.4 Poll sensor value ===
512 -
513 -
514 -Users can poll sensor values based on timestamps. Below is the downlink command.
515 -
516 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
517 -|(% colspan="4" style="background-color:#4f81bd; color:white; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
518 -|(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
519 -|(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
520 -
521 -(((
522 -Timestamp start and Timestamp end-use Unix TimeStamp format as mentioned above. Devices will reply with all data logs during this period, using the uplink interval.
523 -)))
524 -
525 -(((
526 -For example, downlink command [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/CPL01%20LoRaWAN%20Outdoor%20PulseContact%20%20Sensor%20Manual/WebHome/image-20220518162852-1.png?rev=1.1||alt="image-20220518162852-1.png"]]
527 -)))
528 -
529 -(((
530 -Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
531 -)))
532 -
533 -(((
534 -Uplink Internal =5s，means DS20L will send one packet every 5s. range 5~~255s.
535 -)))
536 -
537 -
538 -== 2.6 Frequency Plans ==
539 -
540 -
541 541  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.
542 542  
543 543  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
544 544  
545 545  
546 -3. Configure DS20L
468 += 3. Configure DS20L =
547 547  
548 548  == 3.1 Configure Methods ==
549 549  
... ... @@ -615,7 +615,7 @@
615 615  Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
616 616  )))
617 617  * (((
618 -Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
540 +Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
619 619  
620 620  
621 621  
... ... @@ -638,7 +638,7 @@
638 638  the mode is 0 =Disable Interrupt
639 639  )))
640 640  |(% style="width:154px" %)(((
641 -AT+INTMOD=2
563 +AT+INTMOD=3
642 642  
643 643  (default)
644 644  )))|(% style="width:196px" %)(((
... ... @@ -659,7 +659,79 @@
659 659  
660 660  * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
661 661  
584 +== 3.3.3 Set work mode ==
662 662  
586 +
587 +Feature: Switch working mode
588 +
589 +(% style="color:blue" %)**AT Command: AT+MOD**
590 +
591 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
592 +|=(% 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**
593 +|(% style="width:162px" %)AT+MOD=?|(% style="width:191px" %)Get the current working mode.|(% style="width:106px" %)OK
594 +|(% style="width:162px" %)AT+MOD=1|(% style="width:191px" %)Set the working mode to Regular measurements.|(% style="width:106px" %)(((
595 +OK
596 +Attention:Take effect after ATZ
597 +)))
598 +
599 +(% style="color:blue" %)**Downlink Command:**
600 +
601 +* **Example: **0x0A00  ~/~/  Same as AT+MOD=0
602 +
603 +* **Example:** 0x0A01  ~/~/  Same as AT+MOD=1
604 +
605 +=== 3.3.4 Set threshold and threshold mode ===
606 +
607 +
608 +Feature, Set threshold and threshold mode
609 +
610 +When (% style="color:#037691" %)**AT+DOL=0,0,0,0,400**(%%) is set, No threshold is used, the sampling time is 400ms.
611 +
612 +(% style="color:blue" %)**AT Command: AT+DOL**
613 +
614 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
615 +|(% 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**
616 +|(% style="width:172px" %)AT+ DOL =?|(% style="width:279px" %)Get the current threshold mode and sampling time|(% style="width:118px" %)(((
617 +0,0,0,0,400
618 +OK
619 +)))
620 +|(% style="width:172px" %)AT+ DOL =1,1800,100,0,400|(% style="width:279px" %)Set only the upper and lower thresholds|(% style="width:118px" %)OK
621 +
622 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
623 +|(% rowspan="11" style="color:blue; width:120px" %)**AT+DOL=5,1800,0,0,400**|(% rowspan="6" style="width:240px" %)The first bit sets the limit mode|(% style="width:150px" %)0: Do not use upper and lower limits
624 +|(% style="width:251px" %)1: Use upper and lower limits
625 +|(% style="width:251px" %)2: Less than the lower limit
626 +|(% style="width:251px" %)3: Greater than the lower limit
627 +|(% style="width:251px" %)4: Less than the upper limit
628 +|(% style="width:251px" %)5: Greater than the upper limit
629 +|(% style="width:226px" %)The second bit sets the upper limit value|(% style="width:251px" %)3~~2000MM
630 +|(% style="width:226px" %)The third bit sets the lower limit value|(% style="width:251px" %)3~~2000MM
631 +|(% 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
632 +|(% style="width:251px" %)1 Person or object counting statistics
633 +|(% style="width:226px" %)The fifth bit sets the sampling time|(% style="width:251px" %)(((
634 +0~~10000ms
635 +
636 +
637 +)))
638 +
639 +(% style="color:blue" %)**Downlink Command: 0x07**
640 +
641 +Format: Command Code (0x07) followed by 9bytes.
642 +
643 +* Example 0: Downlink Payload: 070000000000000190  **~-~-->**  AT+MOD=0,0,0,0,400
644 +
645 +* Example 1: Downlink Payload: 070107080064000190  **~-~-->**  AT+MOD=1,1800,100,0,400
646 +
647 +* Example 2: Downlink Payload: 070200000064000190  **~-~-->**  AT+MOD=2,0,100,0,400
648 +
649 +* Example 3: Downlink Payload: 0703200000064000190  **~-~-->**  AT+MOD=3,1800,100,0,400
650 +
651 +* Example 4: Downlink Payload: 070407080000000190  **~-~-->**  AT+MOD=4,0,100,0,400
652 +
653 +* Example 5: Downlink Payload: 070507080000000190  **~-~-->**  AT+MOD=5,1800,100,0,400
654 +
655 +
656 +
663 663  = 4. Battery & Power Consumption =
664 664  
665 665  
... ... @@ -696,6 +696,33 @@
696 696  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"]]
697 697  
698 698  
693 +== 6.2 DS20L programming line ==
694 +
695 +
696 +缺图 后续补上
697 +
698 +feature:
699 +
700 +for AT commands
701 +
702 +Update the firmware of DS20L
703 +
704 +Support interrupt mode
705 +
706 +
707 +== 6.3 LiDAR probe position ==
708 +
709 +
710 +[[image:1701155390576-216.png||height="285" width="307"]]
711 +
712 +The black oval hole in the picture is the LiDAR probe.
713 +
714 +
715 +== 6.4 Interface definition ==
716 +
717 +[[image:image-20231128151132-2.png||height="305" width="557"]]
718 +
719 +
699 699  = 7. Trouble Shooting =
700 700  
701 701  == 7.1 AT Command input doesn't work ==
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