Version 37.7 by Xiaoling on 2022/06/30 15:06
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13 **Table of Contents:**
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15 {{toc/}}
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24
25 = 1. Introduction =
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 [[image:image-20220608143744-1.png]]
47
48
49
50 == 1.2 Features ==
51
52 * LoRaWAN Class A v1.0.3
53 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
54 * SX1262 LoRa Core
55 * Water Leak detect
56 * 2 x AAA LR03 Batteries
57 * AT Commands to change parameters
58 * Uplink on periodically and open/close action
59 * Remote configure parameters via LoRa Downlink
60 * Firmware upgradable via program port
61
62
63
64 == 1.3 Applications ==
65
66 * Smart Buildings & Home Automation
67 * Logistics and Supply Chain Management
68 * Smart Metering
69 * Smart Agriculture
70 * Smart Cities
71 * Smart Factory
72
73
74
75 == 1.4 Dimension ==
76
77 [[image:image-20220608143952-2.png]]
78
79 [[image:1654670405145-346.png]]
80
81
82
83 == 1.5 Firmware Change log ==
84
85 (((
86 LWL02 use the same firmware as LDS01.
87 )))
88
89 (((
90 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
91 )))
92
93
94 = 2. Power ON LWL02 =
95
96 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.
97
98
99 = 3. How to install LWL02 =
100
101 (((
102 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.
103 )))
104
105 [[image:image-20220608144447-4.png]]
106
107
108
109 = 4. Operation Mode =
110
111 == 4.1 How it works? ==
112
113 (((
114 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.
115 )))
116
117 (((
118 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.
119 )))
120
121
122 == 4.2 Example to join LoRaWAN network ==
123
124 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. 
125
126 [[image:1654671007127-335.png]]
127
128
129 (((
130 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.
131 )))
132
133 * (((
134 A keep-alive message which send once per day.
135 )))
136 * (((
137 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
138 )))
139 * (((
140 A periodically update at every 10 minutes when in water leak.
141 )))
142 * (((
143 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
144 )))
145
146 (((
147
148
149 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:
150 )))
151
152 (((
153 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
154 )))
155
156 (((
157 Each LWL02 is shipped with a sticker with unique device EUI:
158 )))
159
160 [[image:1654671040430-368.png]]
161
162
163 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
164
165 **Add APP EUI in the application**
166
167 [[image:1654671794691-956.png]]
168
169
170 [[image:1654671809850-574.png]]
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172 [[image:1654671820156-640.png]]
173
174
175 [[image:1654671832011-696.png]]
176
177
178 **Add APP KEY and DEV EUI**
179
180 [[image:1654671889112-678.png]]
181
182
183 (% 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.
184
185
186 [[image:1654681465260-713.png]]
187
188
189
190 == 4.3 Uplink Payload ==
191
192
193 Uplink Payload total 9 bytes.
194
195 [[image:image-20220608150921-5.png]]
196
197
198 **Example:**
199
200 [[image:1654672186477-234.png]]
201
202
203 (((
204 Example Payload Decoder in TTN V3: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/]]
205 )))
206
207
208 == 4.4 Downlink Payload ==
209
210
211 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
212 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
213 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
214 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
215 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
216 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
217 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
218 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
219 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
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221
222 Example Downlink payload setting in TTN V3:
223
224 [[image:1654673412319-976.png]]
225
226
227 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
228
229 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
230
231
232 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
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234 If payload = 0x04FF, it will reset the LWL02.
235
236
237 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
238
239 0x05 00: Set uplink to LoRaWAN unconfirmed mode
240
241 0x05 01: Set uplink to LoRaWAN confirmed mode
242
243
244 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
245
246 Example: 0xA601: Clear Counting
247 For LWL02: reset both count number and time.
248
249
250 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
251
252 0xA7 01 : Equal to AT+DISALARM=1
253
254 0xA7 00 : Equal to AT+DISALARM=0
255
256
257 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
258
259 Format: 0xA8 aa bb
260
261 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
262
263 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
264
265 Example: 0x A8 00 02 : Set ADR=0 and DR=1
266
267
268 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
269
270 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
271
272
273 == 4.5 Integrate with Datacake ==
274
275 (((
276 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:
277 )))
278
279
280 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
281
282 (% 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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284
285 [[image:1654674520913-519.png]]
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288 [[image:1654674530910-914.png]]
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291 [[image:1654674543078-401.png]]
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293
294 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
295
296 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
297
298 [[image:1654674556510-911.png]]
299
300
301 == 4.6 Alarm Base on Timeout ==
302
303 (((
304 LWL02 can monitor the timeout for a status change, this feature can be used to monitor some event such as open fridge too long etc.
305 )))
306
307 (((
308 User configure this feature by using:
309 )))
310
311 (((
312
313 )))
314
315 (((
316 (% style="color:blue" %)**AT Command**(%%) to configure:
317 )))
318
319 * (((
320 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
321 )))
322
323 (((
324 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.
325 )))
326
327 * (((
328 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
329 )))
330
331 (((
332 (% style="color:blue" %)**Downlink Command**(%%) to configure:
333 )))
334
335 (((
336 **Command: 0xA9 aa bb cc**
337 )))
338
339 (((
340 A9: Command Type Code
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342
343 (((
344 aa: status to be monitor
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346
347 (((
348 bb cc: timeout.
349 )))
350
351 (((
352
353 )))
354
355 (((
356 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
357 )))
358
359 (((
360 Or
361 )))
362
363 (((
364 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
365 )))
366
367
368
369 == 4.7 LEDs ==
370
371
372 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
373 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
374 |(% 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(%%)**
375 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
376 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
377 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
378
379
380
381 = 5. Battery & How to replace =
382
383 == 5.1 Battery Type and replace ==
384
385 (((
386 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:
387 )))
388
389 1. (((
390 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
391 )))
392 1. (((
393 Make sure the direction is correct when install the AAA batteries.
394 )))
395
396 (((
397 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
398 )))
399
400 (((
401
402 )))
403
404 (((
405 Example of AAA LR03 batter:
406 )))
407
408 [[image:1654675278044-307.png]]
409
410
411 == 5.2 Power Consumption Analyze ==
412
413 (((
414 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:
415 )))
416
417 (((
418 [[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]]
419 )))
420
421
422 = 6. Use AT Command =
423
424 == 6.1 Access AT Command ==
425
426 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
427
428 [[image:image-20220608160336-1.png]]
429
430
431 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
432
433 (% style="background-color:yellow" %)**RX <- -> TX**
434
435 (% style="background-color:yellow" %)**TX <- -> RX**
436
437 (% style="background-color:yellow" %)**GND <- -> GND**
438
439
440 (((
441 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:
442 )))
443
444 (((
445 The AT Access password is (% style="color:red" %)**123456**.
446 )))
447
448 [[image:1654675618022-630.png]]
449
450 (((
451 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
452 )))
453
454 (((
455 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.
456 )))
457
458 (((
459 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/]]
460 )))
461
462
463 = 7. FAQ =
464
465 == 7.1 How to upgrade the image? ==
466
467 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]]
468
469
470 == 7.2 How to change the LoRa Frequency Bands/Region? ==
471
472 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.
473
474
475 == 7.3 Can I disable uplink for each event to save battery life? ==
476
477 Yes, User can use below method to disable this:
478
479 (% style="color:#4f81bd" %)**via AT Command**:
480
481 AT+DISALARM=1,  End node will only send packet in TDC time.
482
483 AT+DISALARM=0,  End node will send packet in TDC time or status change for door sensor. 
484
485
486 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
487
488 0xA701 :  Equal to AT+DISALARM=1
489
490 0xA700 :  Equal to AT+DISALARM=0
491
492
493 = 8. Order Info =
494
495 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
496
497 (% style="color:blue" %)**XXX:**
498
499 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
500 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
501 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
502 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
503 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
504 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
505 * (% style="color:red" %)**US915**(%%): frequency bands  US915
506 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
507 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
508
509
510
511 = 9. Packing Info =
512
513 **Package Includes**:
514
515 * LWL02 x 1
516
517
518
519 = 10. Support =
520
521 * 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.
522 * 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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