Version 48.4 by Xiaoling on 2022/10/13 17:18
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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 9 bytes.
211
212 [[image:image-20220608150921-5.png]]
213
214
215 **Example:**
216
217 [[image:1654672186477-234.png]]
218
219
220 (((
221 Example Payload Decoder in TTN V3:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
222 )))
223
224
225
226 == 4.4 Downlink Payload ==
227
228
229 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
230 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
231 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
232 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
233 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
234 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
235 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
236 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
237 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
238
239
240 Example Downlink payload setting in TTN V3:
241
242 [[image:1654673412319-976.png]]
243
244
245 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
246
247 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
248
249
250 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
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252 If payload = 0x04FF, it will reset the LWL02.
253
254
255 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
256
257 0x05 00: Set uplink to LoRaWAN unconfirmed mode
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259 0x05 01: Set uplink to LoRaWAN confirmed mode
260
261
262 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
263
264 Example: 0xA601: Clear Counting
265 For LWL02: reset both count number and time.
266
267
268 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
269
270 0xA7 01 : Equal to AT+DISALARM=1
271
272 0xA7 00 : Equal to AT+DISALARM=0
273
274
275 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
276
277 Format: 0xA8 aa bb
278
279 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
280
281 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
282
283 Example: 0x A8 00 02 : Set ADR=0 and DR=1
284
285
286 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
287
288 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
289
290
291
292 == 4.5 Integrate with Datacake ==
293
294
295 (((
296 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:
297 )))
298
299
300 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
301
302 (% 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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304
305 [[image:1654674520913-519.png]]
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308 [[image:1654674530910-914.png]]
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311 [[image:1654674543078-401.png]]
312
313
314 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
315
316 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
317
318 [[image:1654674556510-911.png]]
319
320
321
322 == 4.6 Alarm Base on Timeout ==
323
324
325 (((
326 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.
327
328 (% 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）**
329 )))
330
331 (((
332 User configure this feature by using:
333 )))
334
335 (((
336
337 )))
338
339 (((
340 (% style="color:blue" %)**AT Command**(%%) to configure:
341 )))
342
343 * (((
344 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
345 )))
346
347 (((
348 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.
349 )))
350
351 * (((
352 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
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355
356 )))
357
358 (((
359 (% style="color:blue" %)**Downlink Command**(%%) to configure:
360 )))
361
362 (((
363 **Command: 0xA9 aa bb cc**
364 )))
365
366 (((
367 A9: Command Type Code
368 )))
369
370 (((
371 aa: status to be monitor
372 )))
373
374 (((
375 bb cc: timeout.
376 )))
377
378 (((
379
380 )))
381
382 (((
383 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
384 )))
385
386 (((
387 Or
388 )))
389
390 (((
391 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
392
393
394
395 )))
396
397 == 4.7 LEDs ==
398
399
400 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
401 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
402 |(% 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(%%)**
403 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
404 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
405 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
406
407
408
409 = 5. Battery & How to replace =
410
411
412 == 5.1 Battery Type and replace ==
413
414
415 (((
416 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:
417 )))
418
419 1. (((
420 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
421 )))
422 1. (((
423 Make sure the direction is correct when install the AAA batteries.
424 )))
425
426 (((
427 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
428 )))
429
430 (((
431
432 )))
433
434 (((
435 Example of AAA LR03 batter:
436 )))
437
438 [[image:1654675278044-307.png]]
439
440
441
442 == 5.2 Power Consumption Analyze ==
443
444
445 (((
446 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:
447 )))
448
449 (((
450 [[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]]
451 )))
452
453
454
455 = 6. Use AT Command =
456
457
458 == 6.1 Access AT Command ==
459
460
461 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
462
463
464 [[image:image-20220608160336-1.png]]
465
466
467 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
468
469 (% style="background-color:yellow" %)**RX <- -> TX**
470
471 (% style="background-color:yellow" %)**TX <- -> RX**
472
473 (% style="background-color:yellow" %)**GND <- -> GND**
474
475
476 (((
477 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:
478 )))
479
480 (((
481 The AT Access password is (% style="color:red" %)**123456**.
482 )))
483
484 [[image:1654675618022-630.png]]
485
486
487 (((
488 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
489 )))
490
491 (((
492 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.
493 )))
494
495 (((
496 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/]]
497 )))
498
499
500
501 = 7. FAQ =
502
503
504 == 7.1 How to upgrade the image? ==
505
506
507 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]]
508
509
510
511 == 7.2 How to change the LoRa Frequency Bands/Region? ==
512
513
514 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.
515
516
517
518 == 7.3 Can I disable uplink for each event to save battery life? ==
519
520
521 Yes, User can use below method to disable this:
522
523
524 (% style="color:blue" %)**via AT Command**:
525
526 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
527
528 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
529
530
531 (% style="color:blue" %)**via LoRaWAN downlink Command**:
532
533 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
534
535 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
536
537
538
539 = 8. Order Info =
540
541
542 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
543
544 (% style="color:blue" %)**XXX:**
545
546 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
547 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
548 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
549 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
550 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
551 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
552 * (% style="color:red" %)**US915**(%%): frequency bands  US915
553 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
554 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
555
556
557
558 = 9. Packing Info =
559
560
561 **Package Includes**:
562
563 * LWL02 x 1
564
565
566
567 = 10. Support =
568
569
570 * 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.
571 * 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]].
572
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