Summary

• Page properties (1 modified, 0 added, 0 removed)
• Attachments (0 modified, 0 added, 6 removed)
  • 1670471530120-960.png
  • 1670471559211-638.png
  • 1670471584490-640.png
  • 1670471613823-833.png
  • image-20221209090938-1.png
  • image-20221212171610-1.jpeg

Details

Page properties

Content

...	...	@@ -1,28 +1,13 @@
1	1	(% style="text-align:center" %)
2		-[[image:LMDS200_10.jpg||height="572" width="572"]]
	2	+[[image:LMDS200_10.jpg]]
3	3
4	4
5		-
6		-
7		-
8		-(% style="display:none" %) (%%)
9		-
10		-
11		-
12		-
13		-
14	14	**Table of Contents：**
15	15
16		-{{toc/}}
17	17
18	18
19	19
20	20
21		-
22		-
23		-
24		-
25		-
26	26	= 1.  Introduction =
27	27
28	28	== 1.1 ​ What is NMDS200 NB-IoT Microwave Radar Distance Sensor ==
...	...	@@ -30,37 +30,25 @@
30	30
31	31	(((
32	32	The Dragino NMDS200 is a(% style="color:blue" %)** NB-IoT Microwave Radar distance sensor**(%%). It uses (% style="color:blue" %)**24Ghz Microwave**(%%) to detect the distance between sensor and different objects. Compare vs ultrasonic or Lidar measurement method, Microwave Radar is (% style="color:blue" %)**more reliable for condensation / dusty environment**(%%). It can sense correct distance even there is water or thick dust on top of the sensor.
33		-)))
34	34
35		-(((
	19	+
36	36	The NMDS200 can be applied to scenarios such as horizontal distance measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, etc.
37		-)))
38	38
39		-(((
40	40	NMDS200 can (% style="color:blue" %)**measure two distances**(%%): the closest object and next object behind the closest one.
41		-)))
42	42
43		-(((
44	44	NMDS200 (% style="color:blue" %)**supports Alarm Feature**(%%), user can set the NMDS200 to uplink data in a short interval when the distance is out of configured range.
45		-)))
46	46
47		-(((
48	48	NarrowBand-Internet of Things (NB-IoT) is a (% style="color:blue" %)**standards-based low power wide area (LPWA) technology**(%%) developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity, and spectrum efficiency, especially in deep coverage.
49		-)))
50	50
51		-(((
52	52	NMDS200 (% style="color:blue" %)**supports different uplink**(%%) methods including (% style="color:blue" %)**TCP, MQTT, UDP, and CoAP**(%%) for different application requirements.
53		-)))
54	54
55		-(((
56	56	NMDS200 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**,(%%) It is designed for long-term use of up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
57		-)))
58	58
59		-(((
60	60	To use NMDS200, user needs to check if there is NB-IoT coverage in the field and with the Nb-IoT bands that NMDS200 supports. If local operator support it, user needs to get a** (% style="color:blue" %)NB-IoT SIM card(%%)** from the operator and install into NMDS200 to get NB-IoT network connection.
61	61	)))
62	62
63	63
	36	+
64	64	== ​1.2  Features ==
65	65
66	66
...	...	@@ -78,15 +78,13 @@
78	78	* Micro SIM card slot for NB-IoT SIM
79	79	* 8500mAh Battery for long-term use
80	80
81		-
82		-
83	83	== 1.3 Radar probe specification ==
84	84
85	85
86	86	* Measuring Method: FMCW
87		-* Frequency: 24.000 ~~ 24.500 GHz
	58	+* Frequency: 24.000 24.500 GHz
88	88	* Measurement output power: 6dBm
89		-* Measure range: 0.5 ~~ 20m
	60	+* Measure range: 0.5 20m
90	90	* Accuracy: ±0.1m
91	91	* Resolution: 0.01m
92	92	* Horizontal Angel: 78°
...	...	@@ -93,7 +93,6 @@
93	93	* Vertical Angel: 23°
94	94
95	95
96		-
97	97	== 1.4  Storage Temperature ==
98	98
99	99
...	...	@@ -100,9 +100,13 @@
100	100	-40°C to +85°C
101	101
102	102
	73	+
	74	+
	75	+
103	103	== 1.5 ​ Applications ==
104	104
105	105
	79	+
106	106	* Horizontal distance measurement
107	107	* Liquid level measurement
108	108	* Parking management system
...	...	@@ -113,8 +113,6 @@
113	113	* Sewer
114	114	* Bottom water level monitoring
115	115
116		-
117		-
118	118	== 1.6  Specification ==
119	119
120	120
...	...	@@ -132,8 +132,6 @@
132	132	* B20 @H-FDD: 800MHz
133	133	* B28 @H-FDD: 700MHz
134	134
135		-
136		-
137	137	== 1.7  Installation ==
138	138
139	139
...	...	@@ -140,12 +140,10 @@
140	140	Sensor measure direction and angle is as below. When install the sensor, please make sure the sensor direct to object.
141	141
142	142
143		-[[image:image-20221207170748-1.png]]
	113	+[[image:image-20221207170748-1.png]] [[image:image-20221207170748-2.png||height="366" width="672"]]
144	144
145	145
146		- [[image:image-20221207170748-2.png||height="345" width="634"]]
147	147
148		-
149	149	== 1.8  Pin Definitions and Switch ==
150	150
151	151
...	...	@@ -161,7 +161,7 @@
161	161
162	162	The diagram below shows the working flow in the default firmware of NMDS200:
163	163
164		-[[image:image-20221021110615-5.png||height="996" width="492"]]
	132	+[[image:image-20221021110615-5.png]]
165	165
166	166
167	167	== 2.2 ​ Configure NMDS200 ==
...	...	@@ -175,7 +175,7 @@
175	175
176	176	Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NMDS200 will use** (% style="color:red" %)CoAP(120.24.4.116:5683)(%%)** or raw (% style="color:red" %)**UDP(120.24.4.116:5601) **(%%)or (% style="color:red" %)**MQTT(120.24.4.116:1883) **(%%)or (% style="color:red" %)**TCP(120.24.4.116:5600)protocol**(%%) to send data to the test server.
177	177
178		-[[image:image-20221209090938-1.png]]
	146	+[[image:image-20221207173300-4.png]]
179	179
180	180
181	181	=== 2.2.1 Insert NB-IoT SIM card ===
...	...	@@ -224,6 +224,7 @@
224	224	(% style="color:red" %)**Note: the valid AT Commands can be found at:  **(%%)[[**https:~~/~~/www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0**>>url:https://www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0]]
225	225
226	226
	195	+
227	227	=== 2.2.3 Use CoAP protocol to uplink data ===
228	228
229	229
...	...	@@ -230,7 +230,7 @@
230	230	(% style="color:red" %)**Note: if you don't have a CoAP server, you can refer this link to set up a CoAP server: **(%%)[[**http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]
231	231
232	232
233		-(% style="color:blue" %)**Use below commands in NMDS200:**
	202	+(% style="color:blue" %)**Use below commands in NDS03A:**
234	234
235	235	* (% style="color:#037691" %)**AT+PRO=1**                (%%) ~/~/ Set to use CoAP protocol to uplink
236	236
...	...	@@ -240,7 +240,7 @@
240	240
241	241	For parameter description, please refer to AT command set
242	242
243		-[[image:1670471530120-960.png||height="647" width="674"]]
	212	+[[image:image-20221021110948-8.png]]
244	244
245	245
246	246	After configuring the server address and (% style="color:green" %)**reset NMDS200**(%%) (via AT+ATZ ), NMDS200 will start to uplink sensor values to the CoAP server.
...	...	@@ -259,7 +259,7 @@
259	259
260	260	* (% style="color:#037691" %)**AT+CFM=1       ** (%%) ~/~/  If the server does not respond, this command is unnecessary
261	261
262		-​ [[image:1670471559211-638.png]]
	231	+​ [[image:image-20221021111025-10.png]]
263	263
264	264
265	265	[[image:image-20221021111033-11.png||height="241" width="576"]]
...	...	@@ -285,7 +285,7 @@
285	285
286	286	* (% style="color:#037691" %)**AT+SUBTOPIC=NSE01_SUB          ** (%%) ~/~/  Set the subscription topic of MQTT
287	287
288		-​ [[image:1670471584490-640.png]]
	257	+​ [[image:image-20221118103445-7.png]]
289	289
290	290
291	291	[[image:1670405928926-116.png]]
...	...	@@ -304,7 +304,7 @@
304	304
305	305	* (% style="color:#037691" %)**AT+SERVADDR=120.24.4.116,5600   ** (%%) ~/~/  Set TCP server address and port
306	306
307		-​ [[image:1670471613823-833.png]]
	276	+​ [[image:1670406036256-101.png||height="676" width="713"]]
308	308
309	309
310	310	[[image:image-20221021111131-15.png]]
...	...	@@ -331,15 +331,15 @@
331	331	Each time the device uploads a data package. The user can use the AT+NOUD command to upload the recorded data.Up to 32 sets of recorded data can be uploaded.
332	332
333	333
334		-(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:450px" %)
335		-|=(% scope="row" style="width: 60px;" %)**Size(bytes)**|(% style="width:50px" %)**8**|(% style="width:30px" %)**2**|(% style="width:30px" %)**2**|(% style="width:75px" %)**1**|(% style="width:30px" %)**1**|(% style="width:50px" %)**1**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**
336		-|=(% style="width: 93px;" %)**Value**|(% style="width:67px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:40px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:45px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:54px" %)MOD|(% style="width:62px" %)Exit flag|(% style="width:94px" %) [[Distance 1>>||anchor="H2.4.5A0Distance"]] |(% style="width:93px" %) [[Distance 2>>||anchor="H2.4.5A0Distance"]]
	303	+(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
	304	+|=(% scope="row" style="width: 50px;" %)**Size(bytes)**|(% style="width:50px" %)**8**|(% style="width:20px" %)**2**|(% style="width:20px" %)**2**|(% style="width:65px" %)**1**|(% style="width:25px" %)**1**|(% style="width:50px" %)**1**|(% style="width:90px" %)**2**|(% style="width:100px" %)**2**
	305	+|=(% style="width: 93px;" %)**Value**|(% style="width:67px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:40px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:45px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:54px" %)MOD|(% style="width:62px" %)Exit flag|(% style="width:94px" %) Distance 1 |(% style="width:93px" %) Distance  2
337	337
338		-(% border="1" style="background-color:#ffffcc; color:green; width:429px" %)
339		-|(% style="width:60px" %)**4**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**4**|(% style="width:100px" %)(((
	307	+(% border="1.5" style="background-color:#ffffcc; color:green; width:450px" %)
	308	+|(% style="width:50px" %)**4**|(% style="width:90px" %)**2**|(% style="width:90px" %)**2**|(% style="width:60px" %)**4**|(% style="width:50px" %)(((
340	340	**1-32 group**
341	341	)))
342		-|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:100px" %)...
	311	+|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.7A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:74px" %)...
343	343
344	344	If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NMDS200 uplink data.
345	345
...	...	@@ -346,8 +346,10 @@
346	346	[[image:1670406261143-723.png]]
347	347
348	348
349		-The payload is ASCII string, representative same HEX: **0x (% style="color:red" %)__f867787050471071__  (% style="color:blue" %)__0064__ (% style="color:green" %) __0cc3__(% style="color:#00b0f0" %) 0__9__(% style="color:#7030a0" %) __01__(% style="color:#0020b0" %) __00__ (% style="color:#420042" %)__00ef__(% style="color:#660066" %) (% style="color:#663300" %)__013d__ (% style="color:#d60093" %)__6390453d__(%%)**
	318	+The payload is ASCII string, representative same HEX: f867787050471071  0064  0cc3  09  01  00 00ef  013d  6390453d
350	350
	320	+**0x (% style="color:red" %)__f867787050471071__  (% style="color:blue" %)__0064__ (% style="color:green" %) __0cc3__(% style="color:#00b0f0" %) 0__9__(% style="color:#7030a0" %) __01__(% style="color:#0020b0" %) __00__ (% style="color:#420042" %)__00ef__(% style="color:#660066" %) (% style="color:#663300" %)__013d__ (% style="color:#d60093" %)__6390453d__(%%)**
	321	+
351	351	**where:**
352	352
353	353	* (% style="color:#037691" %)**Device ID:**(%%) 0x f867787050471071 = f867787050471071
...	...	@@ -390,7 +390,7 @@
390	390
391	391	Specify the software version: 0x64=100, which means firmware version 1.00.
392	392
393		-For example 0x00 64 : This device is NMDS200 with firmware version 1.0.0.
	364	+For example 0x00 64 : This device is NMDS200 1 with firmware version 1.0.0.
394	394
395	395
396	396	=== 2.4.3  Battery Info ===
...	...	@@ -408,17 +408,17 @@
408	408
409	409	NB-IoT Network signal Strength.
410	410
411		-(% style="color:blue" %)**Ex1: 0x1d = 29**
	382	+**Ex1: 0x1d = 29**
412	412
413		-(% style="color:#037691" %)**0** (%%) -113dBm or less
	384	+**0**  -113dBm or less
414	414
415		-(% style="color:#037691" %)**1**  (%%) -111dBm
	386	+**1**  -111dBm
416	416
417		-(% style="color:#037691" %)**2...30** (%%) -109dBm... -53dBm
	388	+**2...30** -109dBm... -53dBm
418	418
419		-(% style="color:#037691" %)**31** (%%) -51dBm or greater
	390	+**31**   -51dBm or greater
420	420
421		-(% style="color:#037691" %)**99** (%%) Not known or not detectable
	392	+**99**    Not known or not detectable
422	422
423	423
424	424	=== 2.4.5  Distance ===
...	...	@@ -426,7 +426,6 @@
426	426
427	427	[[image:1670407401682-959.png]]
428	428
429		-
430	430	(% style="color:blue" %)**Object1 Distance:**
431	431
432	432	Distance between sensor probe to the first object. (unit: cm)
...	...	@@ -480,7 +480,7 @@
480	480	The NMDS200 has an internal LED which is to show the status of different states.
481	481
482	482	* When the device starts normally, the LED will light up for 1 second.
483		-* After NMDS200 join NB-IoT network. The LED will be ON for 3 seconds.
	453	+* After NDS03A join NB-IoT network. The LED will be ON for 3 seconds.
484	484	* For each uplink probe, LED will be on for 500ms.
485	485
486	486
...	...	@@ -490,16 +490,16 @@
490	490
491	491	(% style="color:blue" %)**AT Command: AT+ALARM1=min,max**
492	492
493		-(% style="color:#037691" %)**Example 1:**
	463	+**Example 1:**
494	494
495		-AT+ ALARM1 =60,200  ~/~/ Alarm when distance1 lower than 60.
	465	+AT+ ALARM1 =60,200  ~/~/ Alarm when moisture lower than 60.
496	496
497	497	AT+ ALARM2 =min,max
498	498
499	499
500		-(% style="color:#037691" %)**Example 2:**
	470	+**Example 2:**
501	501
502		-AT+ ALARM2 =200,1500  ~/~/ Alarm when distance2 lower than 1500.
	472	+AT+ ALARM2 =200,1500  ~/~/ Alarm when temperature lower than 1500
503	503
504	504
505	505	== 2.8  Set the number of data to be uploaded and the recording time ==
...	...	@@ -527,7 +527,7 @@
527	527	== 2.10  ​Firmware Change Log ==
528	528
529	529
530		-Download URL & Firmware Change log: [[https:~~/~~/www.dropbox.com/sh/8elvp2qi9bcv47a/AAAKp0E2nUffztF0tYhqPoE1a?dl=0>>https://www.dropbox.com/sh/8elvp2qi9bcv47a/AAAKp0E2nUffztF0tYhqPoE1a?dl=0]]
	500	+Download URL & Firmware Change log: [[https:~~/~~/www.dropbox.com/sh/hacq385w6qgnonr/AAC3D79GFGF1JdZUIzNegn2Ha?dl=0>>https://www.dropbox.com/sh/hacq385w6qgnonr/AAC3D79GFGF1JdZUIzNegn2Ha?dl=0]]
531	531
532	532	Upgrade Instruction: [[Upgrade Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
533	533
...	...	@@ -629,59 +629,65 @@
629	629
630	630	AT+INTMOD            : Set the trigger interrupt mode
631	631
632		-AT+5VT  : Set extend the time of 5V power
	602	+AT+5VT  : Set extend the time of 5V power
633	633
634		-AT+PRO  : Choose agreement
	604	+AT+PRO  : Choose agreement
635	635
636		-AT+RXDL  : Extend the sending and receiving time
	606	+AT+RXDL  : Extend the sending and receiving time
637	637
638		-AT+SERVADDR  : Server Address
	608	+AT+SERVADDR  : Server Address
639	639
640		-AT+TR      :  Get or Set record time
	610	+AT+TR      :  Get or Set record time
641	641
642		-AT+NOUD :  Get or Set the number of data to be uploaded
	612	+AT+NOUD      : Get or Set the number of data to be uploaded
643	643
644	644	AT+CDP     :  Read or Clear cached data
645	645
646		-AT+DEBUG:  Enable or Disable debug mode
	616	+AT+ DEBUG   : Enable or Disable debug mode
647	647
648		-AT+ALARM1:  Get or Set alarm of distance1
	618	+AT+ TTRIG1   : Get or Set PB14 PIN Alarm Base on Timeout
649	649
650		-AT+ALARM2:  Get or Set alarm of distance2
	620	+AT+ TTRIG2   : Get or Set PB15 PIN Alarm Base on Timeout
651	651
652		-AT+GETSENSORVALUE :  Returns the current sensor measurement
	622	+AT+COUNTMOD  :  Get or Set the count mode
653	653
654		-AT+POWERIC :  Get or set the Power IC flag
	624	+AT+TTRCHANNEL  : Get or Set the number of interrupt channels
655	655
	626	+AT+TTRALARM : Get or Set TTRIG1 of Alarm interval (unit: minute)
656	656
	628	+AT+DISALARM  : Enable/Disable Alarm for door open/close or water leak event
	629	+
	630	+AT+ CLRC   :  Clear current door open count
	631	+
	632	+
657	657	(% style="color:blue" %)**COAP Management**
658	658
659		-AT+URI :  Resource parameters
	635	+AT+URI            : Resource parameters
660	660
661	661
662	662	(% style="color:blue" %)**UDP Management**
663	663
664		-AT+CFM :  Upload confirmation mode (only valid for UDP)
	640	+AT+CFM          : Upload confirmation mode (only valid for UDP)
665	665
666	666
667	667	(% style="color:blue" %)**MQTT Management**
668	668
669		-AT+CLIENT  : Get or Set MQTT client
	645	+AT+CLIENT               : Get or Set MQTT client
670	670
671		-AT+UNAME : Get or Set MQTT Username
	647	+AT+UNAME  : Get or Set MQTT Username
672	672
673		-AT+PWD  :  Get or Set MQTT password
	649	+AT+PWD                  : Get or Set MQTT password
674	674
675		-AT+PUBTOPIC :  Get or Set MQTT publish topic
	651	+AT+PUBTOPIC  : Get or Set MQTT publish topic
676	676
677		-AT+SUBTOPIC :  Get or Set MQTT subscription topic
	653	+AT+SUBTOPIC  : Get or Set MQTT subscription topic
678	678
679	679
680	680	(% style="color:blue" %)**Information**
681	681
682		-AT+FDR :  Factory Data Reset
	658	+AT+FDR  : Factory Data Reset
683	683
684		-AT+PWORD :  Serial Access Password
	660	+AT+PWORD  : Serial Access Password
685	685
686	686
687	687	= ​5.  FAQ =
...	...	@@ -693,7 +693,7 @@
693	693
694	694	Please see this link for how to upgrade:  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H2.HardwareUpgradeMethodSupportList]]
695	695
696		-(% style="color:red" %)**Notice: **(% style="color:blue" %)**NMDS200** (%%)**and (% style="color:blue" %)LMDS200(%%)**(% style="color:blue" %) (%%)**share the same mother board. They use the same connection and method to update.**
	672	+(% style="color:red" %)**Notice: **(% style="color:blue" %)**NDS03A** (%%)**and (% style="color:blue" %)LDS03A(%%)**(% style="color:blue" %) (%%)**share the same mother board. They use the same connection and method to update.**
697	697
698	698
699	699	= 6.  Trouble Shooting =
...	...	@@ -713,7 +713,7 @@
713	713	= 7. ​ Order Info =
714	714
715	715
716		-Part Number:(% style="color:blue" %)** NMDS200**
	692	+Part Number**:** NDS03A
717	717
718	718
719	719	= 8.  Packing Info =
...	...	@@ -721,10 +721,8 @@
721	721
722	722	(% style="color:blue" %)**Package Includes**:
723	723
724		-* NMDS200 NB-IoT Microwave Radar Distance Sensor x 1
	700	+* NDS03A Open/Close Door Sensor x 1
725	725
726		-
727		-
728	728	= 9.  Support =
729	729
730	730

1670471530120-960.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-67.6 KB

Content

1670471559211-638.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-170.6 KB

Content

1670471584490-640.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-91.1 KB

Content

1670471613823-833.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-181.0 KB

Content

image-20221209090938-1.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-121.9 KB

Content

image-20221212171610-1.jpeg

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Xiaoling

Size

...	...	@@ -1,1 +1,0 @@
1		-756.0 KB

Content