Version 40.5 by Xiaoling on 2022/08/18 18:10
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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 [[image:image-20220608143744-1.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 [[image:1654670405145-346.png]]
84
85
86
87 == 1.5 Firmware Change log ==
88
89
90 (((
91 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]]
92 )))
93
94 (((
95
96 )))
97
98
99 = 2. Power ON LWL02 =
100
101
102 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.
103
104
105
106 = 3. How to install LWL02 =
107
108
109 (((
110 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.
111
112
113 )))
114
115 [[image:image-20220608144447-4.png]]
116
117
118
119 = 4. Operation Mode =
120
121
122 == 4.1 How it works? ==
123
124
125 (((
126 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.
127 )))
128
129 (((
130 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.
131 )))
132
133
134
135 == 4.2 Example to join LoRaWAN network ==
136
137
138 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. 
139
140 [[image:1654671007127-335.png]]
141
142
143 (((
144 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.
145 )))
146
147 * (((
148 A keep-alive message which send once per day.
149 )))
150 * (((
151 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
152 )))
153 * (((
154 A periodically update at every 10 minutes when in water leak.
155 )))
156 * (((
157 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
158 )))
159
160 (((
161
162
163 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:
164 )))
165
166 (((
167 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
168 )))
169
170 (((
171 Each LWL02 is shipped with a sticker with unique device EUI:
172 )))
173
174 [[image:1654671040430-368.png]]
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177 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
178
179
180 **Add APP EUI in the application**
181
182 [[image:1654671794691-956.png]]
183
184
185 [[image:1654671809850-574.png]]
186
187 [[image:1654671820156-640.png]]
188
189
190 [[image:1654671832011-696.png]]
191
192
193 **Add APP KEY and DEV EUI**
194
195 [[image:1654671889112-678.png]]
196
197
198
199 (% 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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201
202 [[image:1654681465260-713.png]]
203
204
205
206 == 4.3 Uplink Payload ==
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208
209 Uplink Payload total 9 bytes.
210
211 [[image:image-20220608150921-5.png]]
212
213
214 **Example:**
215
216 [[image:1654672186477-234.png]]
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218
219 (((
220 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]]
221 )))
222
223
224
225 == 4.4 Downlink Payload ==
226
227
228 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
229 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
230 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
231 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
232 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
233 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
234 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
235 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
236 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
237
238 Example Downlink payload setting in TTN V3:
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240 [[image:1654673412319-976.png]]
241
242
243 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
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245 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
246
247
248 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
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250 If payload = 0x04FF, it will reset the LWL02.
251
252
253 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
254
255 0x05 00: Set uplink to LoRaWAN unconfirmed mode
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257 0x05 01: Set uplink to LoRaWAN confirmed mode
258
259
260 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
261
262 Example: 0xA601: Clear Counting
263 For LWL02: reset both count number and time.
264
265
266 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
267
268 0xA7 01 : Equal to AT+DISALARM=1
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270 0xA7 00 : Equal to AT+DISALARM=0
271
272
273 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
274
275 Format: 0xA8 aa bb
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277 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
278
279 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
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281 Example: 0x A8 00 02 : Set ADR=0 and DR=1
282
283
284 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
285
286 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
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288
289
290 == 4.5 Integrate with Datacake ==
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293 (((
294 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:
295 )))
296
297
298 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
299
300 (% 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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302
303 [[image:1654674520913-519.png]]
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306 [[image:1654674530910-914.png]]
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309 [[image:1654674543078-401.png]]
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312 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
313
314 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
315
316 [[image:1654674556510-911.png]]
317
318
319
320 == 4.6 Alarm Base on Timeout ==
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323 (((
324 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.
325 )))
326
327 (((
328 User configure this feature by using:
329 )))
330
331 (((
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334
335 (((
336 (% style="color:blue" %)**AT Command**(%%) to configure:
337 )))
338
339 * (((
340 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
341 )))
342
343 (((
344 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.
345 )))
346
347 * (((
348 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
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351
352 )))
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354 (((
355 (% style="color:blue" %)**Downlink Command**(%%) to configure:
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357
358 (((
359 **Command: 0xA9 aa bb cc**
360 )))
361
362 (((
363 A9: Command Type Code
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366 (((
367 aa: status to be monitor
368 )))
369
370 (((
371 bb cc: timeout.
372 )))
373
374 (((
375
376 )))
377
378 (((
379 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
380 )))
381
382 (((
383 Or
384 )))
385
386 (((
387 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
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389
390
391 )))
392
393 == 4.7 LEDs ==
394
395
396 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
397 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
398 |(% 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(%%)**
399 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
400 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
401 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
402
403
404
405 = 5. Battery & How to replace =
406
407
408 == 5.1 Battery Type and replace ==
409
410
411 (((
412 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:
413 )))
414
415 1. (((
416 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
417 )))
418 1. (((
419 Make sure the direction is correct when install the AAA batteries.
420 )))
421
422 (((
423 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
424 )))
425
426 (((
427
428 )))
429
430 (((
431 Example of AAA LR03 batter:
432 )))
433
434 [[image:1654675278044-307.png]]
435
436
437
438 == 5.2 Power Consumption Analyze ==
439
440
441 (((
442 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:
443 )))
444
445 (((
446 [[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]]
447 )))
448
449
450
451 = 6. Use AT Command =
452
453
454 == 6.1 Access AT Command ==
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457 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
458
459
460 [[image:image-20220608160336-1.png]]
461
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463 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
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465 (% style="background-color:yellow" %)**RX <- -> TX**
466
467 (% style="background-color:yellow" %)**TX <- -> RX**
468
469 (% style="background-color:yellow" %)**GND <- -> GND**
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471
472 (((
473 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:
474 )))
475
476 (((
477 The AT Access password is (% style="color:red" %)**123456**.
478 )))
479
480 [[image:1654675618022-630.png]]
481
482
483 (((
484 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
485 )))
486
487 (((
488 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.
489 )))
490
491 (((
492 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/]]
493 )))
494
495
496
497 = 7. FAQ =
498
499
500 == 7.1 How to upgrade the image? ==
501
502
503 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]]
504
505
506
507 == 7.2 How to change the LoRa Frequency Bands/Region? ==
508
509
510 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.
511
512
513
514 == 7.3 Can I disable uplink for each event to save battery life? ==
515
516
517 Yes, User can use below method to disable this:
518
519
520 (% style="color:blue" %)**via AT Command**:
521
522 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
523
524 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
525
526
527 (% style="color:blue" %)**via LoRaWAN downlink Command**:
528
529 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
530
531 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
532
533
534
535 = 8. Order Info =
536
537
538 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
539
540 (% style="color:blue" %)**XXX:**
541
542 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
543 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
544 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
545 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
546 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
547 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
548 * (% style="color:red" %)**US915**(%%): frequency bands  US915
549 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
550 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
551
552
553
554
555 = 9. Packing Info =
556
557
558 **Package Includes**:
559
560 * LWL02 x 1
561
562
563
564
565 = 10. Support =
566
567
568 * 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.
569 * 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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