Last modified by Xiaoling on 2022/10/27 16:10
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11 **Table of Contents:**
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13 {{toc/}}
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23 = 1. Introduction =
24
25
26 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
27
28
29 (((
30 The Dragino LWL02 is a (% style="color:#4f81bd" %)**LoRaWAN Water Sensor**(%%). When there is water between the two metal probes, LWL02 indicates a water leak event and uplink to IoT server via LoRaWAN network.
31 )))
32
33 (((
34 LWL02 is powered by (% style="color:#4f81bd" %)**2 x AAA batteries**(%%) and target for long time use, these two batteries can provide about 16,000 ~~ 70,000 uplink packets, which result in 2 ~~ 10 years battery life. After battery running out, user can easily open the enclosure and replace with 2 common AAA batteries.
35 )))
36
37 (((
38 The LWL02 will send periodically data every day as well as for each water leak event. It also (% style="color:#4f81bd" %)**counts the water leak times**(%%) and (% style="color:#4f81bd" %)**calculate last water leak duration**(%%). User can also disable the uplink for each water leak event, instead, device can count each event and uplink periodically.
39 )))
40
41 (((
42 Each LWL02 is (% style="color:#4f81bd" %)**pre-load with a set of unique keys**(%%) for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
43
44
45 )))
46
47 [[image:image-20220927113420-3.png]]
48
49
50
51 == 1.2 Features ==
52
53
54 * LoRaWAN Class A v1.0.3
55 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
56 * SX1262 LoRa Core
57 * Water Leak detect
58 * 2 x AAA LR03 Batteries
59 * AT Commands to change parameters
60 * Uplink on periodically and open/close action
61 * Remote configure parameters via LoRa Downlink
62 * Firmware upgradable via program port
63
64
65
66 == 1.3 Applications ==
67
68
69 * Smart Buildings & Home Automation
70 * Logistics and Supply Chain Management
71 * Smart Metering
72 * Smart Agriculture
73 * Smart Cities
74 * Smart Factory
75
76
77
78 == 1.4 Dimension ==
79
80
81 [[image:image-20220608143952-2.png]]
82
83
84 [[image:1654670405145-346.png]]
85
86
87
88 == 1.5 Firmware Change log ==
89
90
91 (((
92 LWL02 use the same firmware as LDS01:  [[https:~~/~~/www.dropbox.com/sh/6ls5i0zsvujvbc8/AABe3V5aQXdy7zSxEdEA3DHOa?dl=0>>https://www.dropbox.com/sh/6ls5i0zsvujvbc8/AABe3V5aQXdy7zSxEdEA3DHOa?dl=0]]
93 )))
94
95 (((
96
97 )))
98
99
100 = 2. Power ON LWL02 =
101
102
103 When receive the LWL02, please open the enclosure and add 2 x AAA batteries to power it. The [[LED>>||anchor="H4.7LEDs"]] will blink when device is powered.
104
105
106
107 = 3. How to install LWL02 =
108
109
110 (((
111 When install the LWL02 on wall. Please install as below so the water leak probe will be soak in water for water detect purpose. The LWL02 main body is not water proof. Please don't let water go inside the LWL02 main body.
112
113
114 )))
115
116 [[image:image-20220608144447-4.png]]
117
118
119
120 = 4. Operation Mode =
121
122
123 == 4.1 How it works? ==
124
125
126 (((
127 The LWL02 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and [[power on>>||anchor="H2.PowerONLWL02"]] the LWL02. It will auto join the network via OTAA.
128 )))
129
130 (((
131 In case user can't set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H6.UseATCommand"]] to set the keys in the devices.
132 )))
133
134
135
136 == 4.2 Example to join LoRaWAN network ==
137
138
139 Here shows an example for how to join the [[TTN V3 Network>>url:https://eu1.cloud.thethings.network/]]. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
140
141 [[image:image-20220927113401-2.png]]
142
143
144 (((
145 The LWL02 has water leak detect probe as above. When there is water between these two detect probe, they will be short and generate the water leak event. and send the status to LoRaWAN server. The LWL02 will uplink two type of messages to the server.
146 )))
147
148 * (((
149 A keep-alive message which send once per day.
150 )))
151 * (((
152 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
153 )))
154 * (((
155 A periodically update at every 10 minutes when in water leak.
156 )))
157 * (((
158 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
159 )))
160
161 (((
162
163
164 The LG308 is already set to connect to [[TTN V3 network >>url:https://eu1.cloud.thethings.network/]]. What we need to now is only configure the TTN V3:
165 )))
166
167 (((
168 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
169 )))
170
171 (((
172 Each LWL02 is shipped with a sticker with unique device EUI:
173 )))
174
175 [[image:1654671040430-368.png]]
176
177
178 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
179
180
181 **Add APP EUI in the application**
182
183 [[image:1654671794691-956.png]]
184
185
186 [[image:1654671809850-574.png]]
187
188 [[image:1654671820156-640.png]]
189
190
191 [[image:1654671832011-696.png]]
192
193
194 **Add APP KEY and DEV EUI**
195
196 [[image:1654671889112-678.png]]
197
198
199
200 (% style="color:blue" %)**Step 2**(%%): **[[Power on>>||anchor="H2.PowerONLWL02"]]** LWL02 and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
201
202
203 [[image:1654681465260-713.png]]
204
205
206
207 == 4.3 Uplink Payload ==
208
209
210 Uplink Payload total 10 bytes.
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212
213 (% border="1.5" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
214 |=(% scope="row" style="width: 60px;" %)**Size(bytes）**|(% style="width:60px" %)**2**|(% style="width:60px" %)**1**|(% style="width:100px" %)**3**|(% style="width:110px" %)**3**|(% style="width:110px" %)**1**
215 |=**value**|Status&BAT|(((
216 MOD
217 Always:0x02
218 )))|(% style="width:126px" %)Total_water_leak_events|(% style="width:140px" %)(((
219 Last  water leak duration(unit:min)
220 )))|(% style="width:186px" %)(((
221 Alarm status(Only used in
222 LDS02)Always:0x00
223 )))
224
225 **Example:**
226
227 [[image:1654672186477-234.png]]
228
229
230 (((
231 Example Payload Decoder in TTN V3:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
232 )))
233
234
235
236 == 4.4 Downlink Payload ==
237
238
239 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
240 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
241 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
242 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
243 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
244 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
245 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
246 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
247 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
248
249 Example Downlink payload setting in TTN V3:
250
251 [[image:1654673412319-976.png]]
252
253
254 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
255
256 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
257
258
259 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
260
261 If payload = 0x04FF, it will reset the LWL02.
262
263
264 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
265
266 0x05 00: Set uplink to LoRaWAN unconfirmed mode
267
268 0x05 01: Set uplink to LoRaWAN confirmed mode
269
270
271 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
272
273 Example: 0xA601: Clear Counting
274 For LWL02: reset both count number and time.
275
276
277 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
278
279 0xA7 01 : Equal to AT+DISALARM=1
280
281 0xA7 00 : Equal to AT+DISALARM=0
282
283
284 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
285
286 Format: 0xA8 aa bb
287
288 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
289
290 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
291
292 Example: 0x A8 00 02 : Set ADR=0 and DR=1
293
294
295 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
296
297 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
298
299
300
301 == 4.5 Integrate with Datacake ==
302
303
304 (((
305 Datacake provides a human friendly interface to show the sensor data, once we have data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
306 )))
307
308
309 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
310
311 (% 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:
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313
314 [[image:1654674520913-519.png]]
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317 [[image:1654674530910-914.png]]
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319
320 [[image:1654674543078-401.png]]
321
322
323 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
324
325 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
326
327 [[image:1654674556510-911.png]]
328
329
330
331 == 4.6 Alarm Base on Timeout ==
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333
334 (((
335 LWL02 can monitor the timeout for a status change, this feature can be used to monitor some event such as monitoring water leakage duration etc.
336
337 (% style="color:red" %)**(This command is only applicable to LDS02.In lwl02, this command can only open the alarm, but the alarm time is fixed to 10 minutes）**
338 )))
339
340 (((
341 User configure this feature by using:
342 )))
343
344 (((
345
346 )))
347
348 (((
349 (% style="color:blue" %)**AT Command**(%%) to configure:
350 )))
351
352 * (((
353 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
354 )))
355
356 (((
357 status for more than 30 seconds. LWL02 will send an uplink packet, the Alarm bit (the lowest bit of 10^^th^^ byte of payload) on this uplink packet is set to 1.
358 )))
359
360 * (((
361 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
362
363
364
365 )))
366
367 (((
368 (% style="color:blue" %)**Downlink Command**(%%) to configure:
369 )))
370
371 (((
372 **Command: 0xA9 aa bb cc**
373 )))
374
375 (((
376 A9: Command Type Code
377 )))
378
379 (((
380 aa: status to be monitor
381 )))
382
383 (((
384 bb cc: timeout.
385 )))
386
387 (((
388
389 )))
390
391 (((
392 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
393 )))
394
395 (((
396 Or
397 )))
398
399 (((
400 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
401
402
403
404 )))
405
406 == 4.7 LEDs ==
407
408
409 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
410 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
411 |(% style="width:184px" %)Power On|(% style="width:275px" %)(% style="color:green" %)**GREEN on 1s, **(% style="color:red" %)**RED on 1s,**(%%)** (% style="color:blue" %)BLUE on 1s(%%)**
412 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
413 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
414 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
415
416
417
418 = 5. Battery & How to replace =
419
420
421 == 5.1 Battery Type and replace ==
422
423
424 (((
425 LWL02 is equipped with 2 x AAA LR03 batteries. If the batteries running low(see 2.1v in the platform). User can buy generic AAA battery and replace it. Note:
426 )))
427
428 1. (((
429 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
430 )))
431 1. (((
432 Make sure the direction is correct when install the AAA batteries.
433 )))
434
435 (((
436 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
437 )))
438
439 (((
440
441 )))
442
443 (((
444 Example of AAA LR03 batter:
445 )))
446
447 [[image:1654675278044-307.png]]
448
449
450
451 == 5.2 Power Consumption Analyze ==
452
453
454 (((
455 Dragino battery powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimate battery life:
456 )))
457
458 (((
459 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
460 )))
461
462
463
464 = 6. Use AT Command =
465
466
467 == 6.1 Access AT Command ==
468
469
470 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
471
472
473 [[image:image-20220608160336-1.png]]
474
475
476 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
477
478 (% style="background-color:yellow" %)**RX <- -> TX**
479
480 (% style="background-color:yellow" %)**TX <- -> RX**
481
482 (% style="background-color:yellow" %)**GND <- -> GND**
483
484
485 (((
486 In PC, User needs to set (% style="color:#037691" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**115200**(%%) to access to access serial console of LWL02. Below is the output for reference:
487 )))
488
489 (((
490 The AT Access password is (% style="color:red" %)**123456**.
491 )))
492
493 [[image:1654675618022-630.png]]
494
495
496 (((
497 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
498 )))
499
500 (((
501 When entering the first command, the (% style="color:red" %)**RED LED**(%%) will on and user can now input AT Commands. After input all needed AT Commands, please input **AT+CLPM=1** to set the device to work in Low Power mode and (% style="color:red" %)**RED LED**(%%) will be off.
502 )))
503
504 (((
505 More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/]]
506 )))
507
508
509
510 = 7. FAQ =
511
512
513 == 7.1 How to upgrade the image? ==
514
515
516 User can upgrade the of LWL02 for bug fix, new features, or change working region. The upgrade instruction is here: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
517
518
519
520 == 7.2 How to change the LoRa Frequency Bands/Region? ==
521
522
523 If user has for example US915 frequency and want to change it to AS923 frequency. User can follow the introduction for [[how to upgrade image>>||anchor="H7.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
524
525
526
527 == 7.3 Can I disable uplink for each event to save battery life? ==
528
529
530 Yes, User can use below method to disable this:
531
532
533 (% style="color:blue" %)**via AT Command**:
534
535 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
536
537 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
538
539
540 (% style="color:blue" %)**via LoRaWAN downlink Command**:
541
542 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
543
544 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
545
546
547
548 = 8. Order Info =
549
550
551 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
552
553 (% style="color:blue" %)**XXX:**
554
555 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
556 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
557 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
558 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
559 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
560 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
561 * (% style="color:red" %)**US915**(%%): frequency bands  US915
562 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
563 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
564
565
566
567 = 9. Packing Info =
568
569
570 **Package Includes**:
571
572 * LWL02 x 1
573
574
575
576 = 10. Support =
577
578
579 * 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.
580 * 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.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
581
582

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