Version 44.2 by Xiaoling on 2022/09/27 11:34
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12 **Table of Contents:**
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14 {{toc/}}
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23
24 = 1. Introduction =
25
26
27 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
28
29
30 (((
31 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.
32 )))
33
34 (((
35 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.
36 )))
37
38 (((
39 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.
40 )))
41
42 (((
43 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.
44
45
46 )))
47
48 [[image:image-20220927113420-3.png]]
49
50
51
52 == 1.2 Features ==
53
54
55 * LoRaWAN Class A v1.0.3
56 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
57 * SX1262 LoRa Core
58 * Water Leak detect
59 * 2 x AAA LR03 Batteries
60 * AT Commands to change parameters
61 * Uplink on periodically and open/close action
62 * Remote configure parameters via LoRa Downlink
63 * Firmware upgradable via program port
64
65
66
67 == 1.3 Applications ==
68
69
70 * Smart Buildings & Home Automation
71 * Logistics and Supply Chain Management
72 * Smart Metering
73 * Smart Agriculture
74 * Smart Cities
75 * Smart Factory
76
77
78
79 == 1.4 Dimension ==
80
81
82 [[image:image-20220608143952-2.png]]
83
84
85 [[image:1654670405145-346.png]]
86
87
88
89 == 1.5 Firmware Change log ==
90
91
92 (((
93 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]]
94 )))
95
96 (((
97
98 )))
99
100
101 = 2. Power ON LWL02 =
102
103
104 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.
105
106
107
108 = 3. How to install LWL02 =
109
110
111 (((
112 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.
113
114
115 )))
116
117 [[image:image-20220608144447-4.png]]
118
119
120
121 = 4. Operation Mode =
122
123
124 == 4.1 How it works? ==
125
126
127 (((
128 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.
129 )))
130
131 (((
132 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.
133 )))
134
135
136
137 == 4.2 Example to join LoRaWAN network ==
138
139
140 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. 
141
142 [[image:image-20220927113401-2.png]]
143
144
145 (((
146 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.
147 )))
148
149 * (((
150 A keep-alive message which send once per day.
151 )))
152 * (((
153 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
154 )))
155 * (((
156 A periodically update at every 10 minutes when in water leak.
157 )))
158 * (((
159 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
160 )))
161
162 (((
163
164
165 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:
166 )))
167
168 (((
169 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
170 )))
171
172 (((
173 Each LWL02 is shipped with a sticker with unique device EUI:
174 )))
175
176 [[image:1654671040430-368.png]]
177
178
179 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
180
181
182 **Add APP EUI in the application**
183
184 [[image:1654671794691-956.png]]
185
186
187 [[image:1654671809850-574.png]]
188
189 [[image:1654671820156-640.png]]
190
191
192 [[image:1654671832011-696.png]]
193
194
195 **Add APP KEY and DEV EUI**
196
197 [[image:1654671889112-678.png]]
198
199
200
201 (% 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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204 [[image:1654681465260-713.png]]
205
206
207
208 == 4.3 Uplink Payload ==
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210
211 Uplink Payload total 9 bytes.
212
213 [[image:image-20220608150921-5.png]]
214
215
216 **Example:**
217
218 [[image:1654672186477-234.png]]
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220
221 (((
222 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]]
223 )))
224
225
226
227 == 4.4 Downlink Payload ==
228
229
230 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
231 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
232 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
233 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
234 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
235 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
236 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
237 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
238 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
239
240 Example Downlink payload setting in TTN V3:
241
242 [[image:1654673412319-976.png]]
243
244
245 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
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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**(%%) ===
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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
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272 0xA7 00 : Equal to AT+DISALARM=0
273
274
275 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
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277 Format: 0xA8 aa bb
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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)
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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 ==
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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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305 [[image:1654674520913-519.png]]
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308 [[image:1654674530910-914.png]]
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311 [[image:1654674543078-401.png]]
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314 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
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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.
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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 )))
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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
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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
540 = 8. Order Info =
541
542
543 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
544
545 (% style="color:blue" %)**XXX:**
546
547 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
548 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
549 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
550 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
551 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
552 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
553 * (% style="color:red" %)**US915**(%%): frequency bands  US915
554 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
555 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
556
557
558
559 = 9. Packing Info =
560
561
562 **Package Includes**:
563
564 * LWL02 x 1
565
566
567
568 = 10. Support =
569
570
571 * 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.
572 * 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]].

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