Version 41.3 by Xiaoling on 2022/09/17 11:29
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13 **Table of Contents:**
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15 {{toc/}}
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24
25 = 1. Introduction =
26
27
28 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
29
30
31 (((
32 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.
33 )))
34
35 (((
36 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.
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 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.
45
46
47 )))
48
49 [[image:image-20220608143744-1.png]]
50
51
52
53 == 1.2 Features ==
54
55
56 * LoRaWAN Class A v1.0.3
57 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
58 * SX1262 LoRa Core
59 * Water Leak detect
60 * 2 x AAA LR03 Batteries
61 * AT Commands to change parameters
62 * Uplink on periodically and open/close action
63 * Remote configure parameters via LoRa Downlink
64 * Firmware upgradable via program port
65
66
67
68
69 == 1.3 Applications ==
70
71
72 * Smart Buildings & Home Automation
73 * Logistics and Supply Chain Management
74 * Smart Metering
75 * Smart Agriculture
76 * Smart Cities
77 * Smart Factory
78
79
80
81
82 == 1.4 Dimension ==
83
84
85 [[image:image-20220608143952-2.png]]
86
87
88 [[image:1654670405145-346.png]]
89
90
91
92 == 1.5 Firmware Change log ==
93
94
95 (((
96 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]]
97 )))
98
99 (((
100
101 )))
102
103
104 = 2. Power ON LWL02 =
105
106
107 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.
108
109
110
111 = 3. How to install LWL02 =
112
113
114 (((
115 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.
116
117
118 )))
119
120 [[image:image-20220608144447-4.png]]
121
122
123
124 = 4. Operation Mode =
125
126
127 == 4.1 How it works? ==
128
129
130 (((
131 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.
132 )))
133
134 (((
135 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.
136 )))
137
138
139
140 == 4.2 Example to join LoRaWAN network ==
141
142
143 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. 
144
145 [[image:1654671007127-335.png]]
146
147
148 (((
149 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.
150 )))
151
152 * (((
153 A keep-alive message which send once per day.
154 )))
155 * (((
156 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
157 )))
158 * (((
159 A periodically update at every 10 minutes when in water leak.
160 )))
161 * (((
162 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
163 )))
164
165 (((
166
167
168 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:
169 )))
170
171 (((
172 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
173 )))
174
175 (((
176 Each LWL02 is shipped with a sticker with unique device EUI:
177 )))
178
179 [[image:1654671040430-368.png]]
180
181
182 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
183
184
185 **Add APP EUI in the application**
186
187 [[image:1654671794691-956.png]]
188
189
190 [[image:1654671809850-574.png]]
191
192 [[image:1654671820156-640.png]]
193
194
195 [[image:1654671832011-696.png]]
196
197
198 **Add APP KEY and DEV EUI**
199
200 [[image:1654671889112-678.png]]
201
202
203
204 (% 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.
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206
207 [[image:1654681465260-713.png]]
208
209
210
211 == 4.3 Uplink Payload ==
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213
214 Uplink Payload total 9 bytes.
215
216 [[image:image-20220608150921-5.png]]
217
218
219 **Example:**
220
221 [[image:1654672186477-234.png]]
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223
224 (((
225 Example Payload Decoder in TTN V3:  [[https:~~/~~/www.dropbox.com/sh/01rpk03gupwzkg2/AAACzAaN2I4MC-rw7oltfzUta?dl=0>>https://www.dropbox.com/sh/01rpk03gupwzkg2/AAACzAaN2I4MC-rw7oltfzUta?dl=0]]
226 )))
227
228
229
230 == 4.4 Downlink Payload ==
231
232
233 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
234 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
235 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
236 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
237 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
238 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
239 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
240 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
241 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
242
243 Example Downlink payload setting in TTN V3:
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245 [[image:1654673412319-976.png]]
246
247
248 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
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250 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
251
252
253 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
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255 If payload = 0x04FF, it will reset the LWL02.
256
257
258 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
259
260 0x05 00: Set uplink to LoRaWAN unconfirmed mode
261
262 0x05 01: Set uplink to LoRaWAN confirmed mode
263
264
265 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
266
267 Example: 0xA601: Clear Counting
268 For LWL02: reset both count number and time.
269
270
271 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
272
273 0xA7 01 : Equal to AT+DISALARM=1
274
275 0xA7 00 : Equal to AT+DISALARM=0
276
277
278 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
279
280 Format: 0xA8 aa bb
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282 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
283
284 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
285
286 Example: 0x A8 00 02 : Set ADR=0 and DR=1
287
288
289 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
290
291 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
292
293
294
295 == 4.5 Integrate with Datacake ==
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297
298 (((
299 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:
300 )))
301
302
303 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
304
305 (% 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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308 [[image:1654674520913-519.png]]
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311 [[image:1654674530910-914.png]]
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314 [[image:1654674543078-401.png]]
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316
317 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
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319 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
320
321 [[image:1654674556510-911.png]]
322
323
324
325 == 4.6 Alarm Base on Timeout ==
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328 (((
329 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.
330
331 (% 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）**
332 )))
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334 (((
335 User configure this feature by using:
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337
338 (((
339
340 )))
341
342 (((
343 (% style="color:blue" %)**AT Command**(%%) to configure:
344 )))
345
346 * (((
347 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
348 )))
349
350 (((
351 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.
352 )))
353
354 * (((
355 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
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358
359 )))
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361 (((
362 (% style="color:blue" %)**Downlink Command**(%%) to configure:
363 )))
364
365 (((
366 **Command: 0xA9 aa bb cc**
367 )))
368
369 (((
370 A9: Command Type Code
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372
373 (((
374 aa: status to be monitor
375 )))
376
377 (((
378 bb cc: timeout.
379 )))
380
381 (((
382
383 )))
384
385 (((
386 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
387 )))
388
389 (((
390 Or
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393 (((
394 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
395
396
397
398 )))
399
400 == 4.7 LEDs ==
401
402
403 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
404 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
405 |(% 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(%%)**
406 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
407 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
408 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
409
410
411
412
413 = 5. Battery & How to replace =
414
415
416 == 5.1 Battery Type and replace ==
417
418
419 (((
420 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:
421 )))
422
423 1. (((
424 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
425 )))
426 1. (((
427 Make sure the direction is correct when install the AAA batteries.
428 )))
429
430 (((
431 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
432 )))
433
434 (((
435
436 )))
437
438 (((
439 Example of AAA LR03 batter:
440 )))
441
442 [[image:1654675278044-307.png]]
443
444
445
446 == 5.2 Power Consumption Analyze ==
447
448
449 (((
450 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:
451 )))
452
453 (((
454 [[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]]
455 )))
456
457
458
459 = 6. Use AT Command =
460
461
462 == 6.1 Access AT Command ==
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465 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
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467
468 [[image:image-20220608160336-1.png]]
469
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471 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
472
473 (% style="background-color:yellow" %)**RX <- -> TX**
474
475 (% style="background-color:yellow" %)**TX <- -> RX**
476
477 (% style="background-color:yellow" %)**GND <- -> GND**
478
479
480 (((
481 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:
482 )))
483
484 (((
485 The AT Access password is (% style="color:red" %)**123456**.
486 )))
487
488 [[image:1654675618022-630.png]]
489
490
491 (((
492 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
493 )))
494
495 (((
496 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.
497 )))
498
499 (((
500 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/]]
501 )))
502
503
504
505 = 7. FAQ =
506
507
508 == 7.1 How to upgrade the image? ==
509
510
511 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]]
512
513
514
515 == 7.2 How to change the LoRa Frequency Bands/Region? ==
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517
518 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.
519
520
521
522 == 7.3 Can I disable uplink for each event to save battery life? ==
523
524
525 Yes, User can use below method to disable this:
526
527
528 (% style="color:blue" %)**via AT Command**:
529
530 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
531
532 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
533
534
535 (% style="color:blue" %)**via LoRaWAN downlink Command**:
536
537 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
538
539 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
540
541
542
543
544 = 8. Order Info =
545
546
547 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
548
549 (% style="color:blue" %)**XXX:**
550
551 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
552 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
553 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
554 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
555 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
556 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
557 * (% style="color:red" %)**US915**(%%): frequency bands  US915
558 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
559 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
560
561
562
563
564 = 9. Packing Info =
565
566
567 **Package Includes**:
568
569 * LWL02 x 1
570
571
572
573
574 = 10. Support =
575
576
577 * 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.
578 * 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]].
579
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