Version 56.2 by Xiaoling on 2022/12/27 16:58
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1 (% style="text-align:center" %)
2 [[image:image-20220927133941-2.png]]
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11 **Table of Contents:**
12
13 {{toc/}}
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22
23 = 1. Introduction =
24
25 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
26
27
28 (((
29 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.
30 )))
31
32 (((
33 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.
34 )))
35
36 (((
37 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.
38 )))
39
40 (((
41 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.
42
43
44 )))
45
46 [[image:image-20220927113420-3.png]]
47
48
49 == 1.2 Features ==
50
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
67 * Smart Buildings & Home Automation
68 * Logistics and Supply Chain Management
69 * Smart Metering
70 * Smart Agriculture
71 * Smart Cities
72 * Smart Factory
73
74
75
76 == 1.4 Dimension ==
77
78
79 [[image:image-20220608143952-2.png]]
80
81
82 [[image:1654670405145-346.png]]
83
84
85 == 1.5 Firmware Change log ==
86
87
88 (((
89 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]]
90 )))
91
92 (((
93
94 )))
95
96 = 2. Power ON LWL02 =
97
98
99 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.
100
101
102 = 3. How to install LWL02 =
103
104
105 (((
106 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.
107
108
109 )))
110
111 [[image:image-20220608144447-4.png]]
112
113
114 = 4. Operation Mode =
115
116 == 4.1 How it works? ==
117
118
119 (((
120 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.
121 )))
122
123 (((
124 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.
125 )))
126
127
128 == 4.2 Example to join LoRaWAN network ==
129
130
131 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. 
132
133 [[image:image-20220927113401-2.png]]
134
135
136 (((
137 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.
138 )))
139
140 * (((
141 A keep-alive message which send once per day.
142 )))
143 * (((
144 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
145 )))
146 * (((
147 A periodically update at every 10 minutes when in water leak.
148 )))
149 * (((
150 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
151 )))
152
153 (((
154
155
156 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:
157 )))
158
159 (((
160 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
161 )))
162
163 (((
164 Each LWL02 is shipped with a sticker with unique device EUI:
165 )))
166
167 [[image:1654671040430-368.png]]
168
169
170 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
171
172
173 **Add APP EUI in the application**
174
175 [[image:1654671794691-956.png]]
176
177
178 [[image:1654671809850-574.png]]
179
180 [[image:1654671820156-640.png]]
181
182
183 [[image:1654671832011-696.png]]
184
185
186 **Add APP KEY and DEV EUI**
187
188 [[image:1654671889112-678.png]]
189
190
191
192 (% 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.
193
194
195 [[image:1654681465260-713.png]]
196
197
198 == 4.3 Uplink Payload ==
199
200
201 Uplink Payload total 10 bytes.
202
203
204 (% border="1.5" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
205 |=(% scope="row" style="width: 60px;" %)**Size(bytes）**|(% style="width:60px" %)**2**|(% style="width:60px" %)**1**|(% style="width:100px" %)**3**|(% style="width:110px" %)**3**|(% style="width:110px" %)**1**
206 |=**value**|Status&BAT|(((
207 MOD
208 Always:0x02
209 )))|(% style="width:126px" %)Total_water_leak_events|(% style="width:140px" %)(((
210 Last  water leak duration(unit:min)
211 )))|(% style="width:186px" %)(((
212 Alarm status(Only used in
213 LDS02)Always:0x00
214 )))
215
216 **Example:**
217
218 [[image:1654672186477-234.png]]
219
220
221 (((
222 Example Payload Decoder in TTN V3:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
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 Example Downlink payload setting in TTN V3:
240
241 [[image:1654673412319-976.png]]
242
243
244 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
245
246 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
247
248
249 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
250
251 If payload = 0x04FF, it will reset the LWL02.
252
253
254 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
255
256 0x05 00: Set uplink to LoRaWAN unconfirmed mode
257
258 0x05 01: Set uplink to LoRaWAN confirmed mode
259
260
261 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
262
263 Example: 0xA601: Clear Counting
264 For LWL02: reset both count number and time.
265
266
267 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
268
269 0xA7 01 : Equal to AT+DISALARM=1
270
271 0xA7 00 : Equal to AT+DISALARM=0
272
273
274 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
275
276 Format: 0xA8 aa bb
277
278 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
279
280 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
281
282 Example: 0x A8 00 02 : Set ADR=0 and DR=1
283
284
285 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
286
287 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
288
289
290 == 4.5 Integrate with Datacake ==
291
292
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:
301
302
303 [[image:1654674520913-519.png]]
304
305
306 [[image:1654674530910-914.png]]
307
308
309 [[image:1654674543078-401.png]]
310
311
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 == 4.6 Alarm Base on Timeout ==
320
321
322 (((
323 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.
324
325 (% 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）**
326 )))
327
328 (((
329 User configure this feature by using:
330 )))
331
332 (((
333
334 )))
335
336 (((
337 (% style="color:blue" %)**AT Command**(%%) to configure:
338 )))
339
340 * (((
341 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
342 )))
343
344 (((
345 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.
346 )))
347
348 * (((
349 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
350
351
352
353 )))
354
355 (((
356 (% style="color:blue" %)**Downlink Command**(%%) to configure:
357 )))
358
359 (((
360 **Command: 0xA9 aa bb cc**
361 )))
362
363 (((
364 A9: Command Type Code
365 )))
366
367 (((
368 aa: status to be monitor
369 )))
370
371 (((
372 bb cc: timeout.
373 )))
374
375 (((
376
377 )))
378
379 (((
380 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
381 )))
382
383 (((
384 Or
385 )))
386
387 (((
388 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
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 == 5.1 Battery Type and replace ==
408
409
410 (((
411 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:
412 )))
413
414 1. (((
415 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
416 )))
417 1. (((
418 Make sure the direction is correct when install the AAA batteries.
419 )))
420
421 (((
422 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
423 )))
424
425 (((
426
427 )))
428
429 (((
430 Example of AAA LR03 batter:
431 )))
432
433 [[image:1654675278044-307.png]]
434
435
436 == 5.2 Power Consumption Analyze ==
437
438
439 (((
440 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:
441 )))
442
443 (((
444 [[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]]
445 )))
446
447
448 = 6. Use AT Command =
449
450 == 6.1 Access AT Command ==
451
452
453 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
454
455 [[image:image-20221226104917-1.png||height="557" width="850"]]
456
457
458 (((
459 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:
460 )))
461
462 (((
463 The AT Access password is (% style="color:red" %)**123456**.
464 )))
465
466 [[image:1654675618022-630.png]]
467
468
469 (((
470 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
471 )))
472
473 (((
474 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.
475 )))
476
477 (((
478 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/]]
479 )))
480
481
482 = 7. FAQ =
483
484 == 7.1 How to upgrade the image? ==
485
486
487 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]]
488
489
490 == 7.2 How to change the LoRa Frequency Bands/Region? ==
491
492
493 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.
494
495
496 == 7.3 Can I disable uplink for each event to save battery life? ==
497
498
499 Yes, User can use below method to disable this:
500
501
502 (% style="color:blue" %)**via AT Command**:
503
504 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
505
506 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
507
508
509 (% style="color:blue" %)**via LoRaWAN downlink Command**:
510
511 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
512
513 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
514
515
516 == 7.4 How to change Sub-Band for LWL02? ==
517
518
519 (% style="color:blue" %)**Before v1.6 firmware**(%%): LWL02 works in Subband 2 by default in AU915 / US915 band. So if the LoRaWAN server works in other subband, there will be issue for LWL02 to Join the server. In this case, User can use AT COmmand to change the subband. See AT Command chapther for the hardware connection. Below are the steps to change sub-band:
520
521 * Press rest button.
522 * Send (% style="color:#037691" %)**123456**(%%) password
523 * Send command (% style="color:#037691" %)**AT+CFREQBANDMASK=0001 **(%%)( 0001 for subband 1, 0002 for subband 2, etc..)
524 * Press rest button to restart to new subband
525 * Example output:
526
527 (% class="mark small" %)[3369]DRAGINO LWL01 Device
528 [3370]Frequency Band: US915 v1.5
529 [3373]OTAA
530 [3374]DevEui= 7896785455246354
531 [3377]class type A
532 [3379]freq mode intra(%%)
533 (% class="mark mark small small" %)[3381]**scan chn mask 0x0002   ~-~-> use subband 2**
534
535 (% class="mark small" %)LM502:~~# [10793]txDone
536 123456       ~-~-> ENTER PASSWORD
537 Correct Password
538
539 (% class="mark small" %)[105115]rxTimeOut
540 **AT+CFREQBANDMASK=0001   ~-~-> Change to Subband1**
541 OK
542
543 (% class="mark small" %)[3371]DRAGINO LWL01 Device
544 [3373]Frequency Band: US915 v1.5
545 [3376]OTAA
546 [3377]DevEui= 7896785455246354
547 [3380]class type A
548 [3382]freq mode intra
549 [3384]**scan chn mask 0x0001  ~-~-> reboot and works on Subband1 now**
550
551
552 (% style="color:blue" %)**Since firmware v1.6: **(%%)LWL02 works in chn mask 0x0000. where cover all subbands. so no need to use AT Commands to change subband and it can works for every subband.
553
554
555 == 7.5 My sensor works for Helium AU915 before but not it doesn't work, Why? ==
556
557
558 It is sub-band issue, See chapter 7.4.Helium Change the Subband for AU915 from subband2 to Subband1 which cause the sensor doesn't work.
559
560
561 = 8. Order Info =
562
563
564 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
565
566 (% style="color:blue" %)**XXX:**
567
568 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
569 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
570 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
571 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
572 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
573 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
574 * (% style="color:red" %)**US915**(%%): frequency bands  US915
575 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
576 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
577
578
579
580 = 9. Packing Info =
581
582
583 **Package Includes**:
584
585 * LWL02 x 1
586
587
588
589 = 10. Support =
590
591
592 * 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.
593 * 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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