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Last modified by Mengting Qiu on 2023/12/14 11:15
From version 125.1
edited by Xiaoling
on 2023/11/29 08:52
Change comment: Uploaded new attachment "image-20231129085201-1.png", version {1}
To version 116.5
edited by Xiaoling
on 2023/11/13 11:28
Change comment: There is no comment for this version

Summary

Details

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Content
... ... @@ -47,8 +47,6 @@
47 47  * Firmware upgradable via program port or LoRa protocol
48 48  * Built-in 2400mAh battery or power by external power source
49 49  
50 -
51 -
52 52  == 1.3 Specification ==
53 53  
54 54  
... ... @@ -130,7 +130,6 @@
130 130  
131 131  (% style="color:blue" %)**Step 2:**(%%) Activate on DS20L
132 132  
133 -[[image:image-20231128133704-1.png||height="189" width="441"]]
134 134  
135 135  Press the button for 5 seconds to activate the DS20L.
136 136  
... ... @@ -156,9 +156,9 @@
156 156  
157 157  Example parse in TTNv3
158 158  
159 -[[image:1701149922873-259.png]]
156 +[[image:image-20230805103904-1.png||height="131" width="711"]]
160 160  
161 -(% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x21
158 +(% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x24
162 162  
163 163  (% style="color:blue" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version
164 164  
... ... @@ -212,121 +212,138 @@
212 212  === 2.3.2 Uplink Payload, FPORT~=2 ===
213 213  
214 214  
215 -==== (% style="color:red" %)**MOD~=1**(%%) ====
212 +(((
213 +DS20L will send this uplink **after** Device Status once join the LoRaWAN network successfully. And DS20L will:
216 216  
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.
215 +periodically send this uplink every 20 minutes, this interval [[can be changed>>||anchor="H3.3.1SetTransmitIntervalTime"]].
218 218  
219 -Uplink Payload totals 10 bytes.
217 +Uplink Payload totals 11 bytes.
218 +)))
220 220  
221 221  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
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 +|=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
222 +**Size(bytes)**
223 +)))|=(% 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**
224 +|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="HBatteryInfo"]]|(% style="width:62.5px" %)(((
225 +[[Temperature DS18B20>>||anchor="HDS18B20Temperaturesensor"]]
226 +)))|[[Distance>>||anchor="HDistance"]]|[[Distance signal strength>>||anchor="HDistancesignalstrength"]]|(% style="width:122px" %)(((
227 +[[Interrupt flag & Interrupt_level>>||anchor="HInterruptPin26A0InterruptLevel"]]
228 +)))|(% style="width:54px" %)[[LiDAR temp>>||anchor="HLiDARtemp"]]|(% style="width:96px" %)(((
229 +[[Message Type>>||anchor="HMessageType"]]
230 +)))
224 224  
225 -[[image:1701155076393-719.png]]
232 +[[image:image-20230805104104-2.png||height="136" width="754"]]
226 226  
227 -(% style="color:blue" %)**Battery Info:**
228 228  
229 -Check the battery voltage for DS20L
235 +==== (% style="color:blue" %)**Battery Info**(%%) ====
230 230  
231 -Ex1: 0x0E10 = 3600mV
232 232  
238 +Check the battery voltage for DS20L.
233 233  
234 -(% style="color:blue" %)**MOD & Alarm & Interrupt:**
240 +Ex1: 0x0B45 = 2885mV
235 235  
236 -(% style="color:red" %)**MOD:**
242 +Ex2: 0x0B49 = 2889mV
237 237  
238 -**Example: ** (0x60>>6) & 0x3f =1
239 239  
240 -**0x01:**  Regularly detect distance and report.
241 -**0x02: ** Uninterrupted measurement (external power supply).
245 +==== (% style="color:blue" %)**DS18B20 Temperature sensor**(%%) ====
242 242  
243 -(% style="color:red" %)**Alarm:**
244 244  
245 -When the detection distance exceeds the limit, the alarm flag is set to 1.
248 +This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
246 246  
247 -(% style="color:red" %)**Interrupt:**
248 248  
249 -Whether it is an external interrupt.
251 +**Example**:
250 250  
253 +If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
251 251  
252 -(% style="color:blue" %)**Distance info:**
255 +If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
253 253  
257 +
258 +==== (% style="color:blue" %)**Distance**(%%) ====
259 +
260 +
261 +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.
262 +
263 +
254 254  **Example**:
255 255  
256 -If payload is: 0708H: distance = 0708H = 1800 mm
266 +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.
257 257  
258 258  
259 -(% style="color:blue" %)**Sensor State:**
269 +==== (% style="color:blue" %)**Distance signal strength**(%%) ====
260 260  
261 -Ex1: 0x00: Normal collection distance
262 262  
263 -Ex2 0x0x: Distance collection is wrong
272 +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.
264 264  
265 265  
266 -(% style="color:blue" %)**Interript Count:**
275 +**Example**:
267 267  
268 -If payload is:000007D0H: count = 07D0H =2000
277 +If payload is: 01D7(H)=471(D), distance signal strength=471, 471>100,471≠65535, the measured value of Dist is considered credible.
269 269  
279 +Customers can judge whether they need to adjust the environment based on the signal strength.
270 270  
271 271  
272 -==== (% style="color:red" %)**MOD~=2**(%%)** ** ====
282 +**1) When the sensor detects valid data:**
273 273  
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.
284 +[[image:image-20230805155335-1.png||height="145" width="724"]]
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
279 279  
280 -[[image:1701155150328-206.png]]
287 +**2) When the sensor detects invalid data:**
281 281  
282 -(% style="color:blue" %)**MOD & Alarm & Do & Limit flag:**
289 +[[image:image-20230805155428-2.png||height="139" width="726"]]
283 283  
284 -(% style="color:red" %)**MOD:**
285 285  
286 -**Example: ** (0x60>>6) & 0x3f =1
292 +**3) When the sensor is not connected:**
287 287  
288 -**0x01:**  Regularly detect distance and report.
289 -**0x02: ** Uninterrupted measurement (external power supply).
294 +[[image:image-20230805155515-3.png||height="143" width="725"]]
290 290  
291 -(% style="color:red" %)**Alarm:**
292 292  
293 -When the detection distance exceeds the limit, the alarm flag is set to 1.
297 +==== (% style="color:blue" %)**Interrupt Pin & Interrupt Level**(%%) ====
294 294  
295 -(% style="color:red" %)**Do:**
296 296  
297 -When the distance exceeds the set threshold, pull the Do pin high.
300 +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.
298 298  
299 -(% style="color:red" %)**Limit flag:**
302 +Note: The Internet Pin is a separate pin in the screw terminal. See pin mapping of GPIO_EXTI .
300 300  
301 -Mode for setting threshold: 0~~5
304 +**Example:**
302 302  
303 -0: does not use upper and lower limits
306 +If byte[0]&0x01=0x00 : Normal uplink packet.
304 304  
305 -1: Use upper and lower limits
308 +If byte[0]&0x01=0x01 : Interrupt Uplink Packet.
306 306  
307 -2: is less than the lower limit value
308 308  
309 -3: is greater than the lower limit value
311 +==== (% style="color:blue" %)**LiDAR temp**(%%) ====
310 310  
311 -4: is less than the upper limit
312 312  
313 -5: is greater than the upper limit
314 +Characterize the internal temperature value of the sensor.
314 314  
316 +**Example: **
317 +If payload is: 1C(H) <<24>>24=28(D),LiDAR temp=28℃.
318 +If payload is: F2(H) <<24>>24=-14(D),LiDAR temp=-14℃.
315 315  
316 -(% style="color:blue" %)**Upper limit:**
317 317  
318 -The upper limit of the threshold cannot exceed 2000mm.
321 +==== (% style="color:blue" %)**Message Type**(%%) ====
319 319  
320 320  
321 -(% style="color:blue" %)**Lower limit:**
324 +(((
325 +For a normal uplink payload, the message type is always 0x01.
326 +)))
322 322  
323 -The lower limit of the threshold cannot be less than 3mm.
328 +(((
329 +Valid Message Type:
330 +)))
324 324  
332 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:499px" %)
333 +|=(% 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**
334 +|(% style="width:160px" %)0x01|(% style="width:163px" %)Normal Uplink|(% style="width:173px" %)Normal Uplink Payload
335 +|(% style="width:160px" %)0x02|(% style="width:163px" %)Reply configures info|(% style="width:173px" %)Configure Info Payload
325 325  
337 +[[image:image-20230805150315-4.png||height="233" width="723"]]
338 +
339 +
326 326  === 2.3.3 Historical measuring distance, FPORT~=3 ===
327 327  
328 328  
329 -DS20L stores sensor values and users can retrieve these history values via the downlink command.
343 +DS20L stores sensor values and users can retrieve these history values via the [[downlink command>>||anchor="H2.5.4Pollsensorvalue"]].
330 330  
331 331  The historical payload includes one or multiplies entries and every entry has the same payload as Real-Time measuring distance.
332 332  
... ... @@ -454,18 +454,90 @@
454 454  
455 455  After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
456 456  
457 -[[image:1701152946067-561.png]]
471 +[[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"]]
458 458  
459 459  
460 -== 2.5 Frequency Plans ==
474 +== 2.5 Datalog Feature ==
461 461  
462 462  
477 +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.
478 +
479 +
480 +=== 2.5.1 Ways to get datalog via LoRaWAN ===
481 +
482 +
483 +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.
484 +
485 +* (((
486 +a) DS20L will do an ACK check for data records sending to make sure every data arrive server.
487 +)))
488 +* (((
489 +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.
490 +)))
491 +
492 +=== 2.5.2 Unix TimeStamp ===
493 +
494 +
495 +DS20L uses Unix TimeStamp format based on
496 +
497 +[[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"]]
498 +
499 +User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
500 +
501 +Below is the converter example
502 +
503 +[[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"]]
504 +
505 +
506 +So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
507 +
508 +
509 +=== 2.5.3 Set Device Time ===
510 +
511 +
512 +User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
513 +
514 +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).
515 +
516 +(% 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.**
517 +
518 +
519 +=== 2.5.4 Poll sensor value ===
520 +
521 +
522 +Users can poll sensor values based on timestamps. Below is the downlink command.
523 +
524 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
525 +|(% colspan="4" style="background-color:#4f81bd; color:white; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
526 +|(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
527 +|(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
528 +
529 +(((
530 +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.
531 +)))
532 +
533 +(((
534 +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"]]
535 +)))
536 +
537 +(((
538 +Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
539 +)))
540 +
541 +(((
542 +Uplink Internal =5s，means DS20L will send one packet every 5s. range 5~~255s.
543 +)))
544 +
545 +
546 +== 2.6 Frequency Plans ==
547 +
548 +
463 463  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.
464 464  
465 465  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
466 466  
467 467  
468 -= 3. Configure DS20L =
554 +3. Configure DS20L
469 469  
470 470  == 3.1 Configure Methods ==
471 471  
... ... @@ -537,7 +537,7 @@
537 537  Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
538 538  )))
539 539  * (((
540 -Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
626 +Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
541 541  
542 542  
543 543  
... ... @@ -560,7 +560,7 @@
560 560  the mode is 0 =Disable Interrupt
561 561  )))
562 562  |(% style="width:154px" %)(((
563 -AT+INTMOD=3
649 +AT+INTMOD=2
564 564  
565 565  (default)
566 566  )))|(% style="width:196px" %)(((
... ... @@ -581,79 +581,6 @@
581 581  
582 582  * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
583 583  
584 -== 3.3.3 Set work mode ==
585 -
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 -
657 657  = 4. Battery & Power Consumption =
658 658  
659 659  
... ... @@ -690,33 +690,6 @@
690 690  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"]]
691 691  
692 692  
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 -
720 720  = 7. Trouble Shooting =
721 721  
722 722  == 7.1 AT Command input doesn't work ==
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