Version 57.2 by Xiaoling on 2023/04/26 08:48
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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 == 1.3 Applications ==
64
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 == 1.4 Dimension ==
75
76
77 [[image:image-20220608143952-2.png]]
78
79
80 [[image:1654670405145-346.png]]
81
82
83 == 1.5 Firmware Change log ==
84
85
86 (((
87 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]]
88 )))
89
90 (((
91
92 )))
93
94 = 2. Power ON LWL02 =
95
96
97 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.
98
99
100 = 3. How to install LWL02 =
101
102
103 (((
104 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.
105
106
107 )))
108
109 [[image:image-20220608144447-4.png]]
110
111
112 = 4. Operation Mode =
113
114 == 4.1 How it works? ==
115
116
117 (((
118 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.
119 )))
120
121 (((
122 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.
123 )))
124
125
126 == 4.2 Example to join LoRaWAN network ==
127
128
129 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. 
130
131 [[image:image-20220927113401-2.png]]
132
133
134 (((
135 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.
136 )))
137
138 * (((
139 A keep-alive message which send once per day.
140 )))
141 * (((
142 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
143 )))
144 * (((
145 A periodically update at every 10 minutes when in water leak.
146 )))
147 * (((
148 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
149 )))
150
151 (((
152
153
154 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:
155 )))
156
157 (((
158 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
159 )))
160
161 (((
162 Each LWL02 is shipped with a sticker with unique device EUI:
163 )))
164
165 [[image:image-20230426084834-1.png]]
166
167
168 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
169
170
171 **Add APP EUI in the application**
172
173 [[image:1654671794691-956.png]]
174
175
176 [[image:1654671809850-574.png]]
177
178 [[image:1654671820156-640.png]]
179
180
181 [[image:1654671832011-696.png]]
182
183
184 **Add APP KEY and DEV EUI**
185
186 [[image:1654671889112-678.png]]
187
188
189
190 (% 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.
191
192
193 [[image:1654681465260-713.png]]
194
195
196 == 4.3 Uplink Payload ==
197
198
199 Uplink Payload total 10 bytes.
200
201
202 (% border="1.5" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
203 |=(% 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**
204 |=**value**|Status&BAT|(((
205 MOD
206 Always:0x02
207 )))|(% style="width:126px" %)Total_water_leak_events|(% style="width:140px" %)(((
208 Last  water leak duration(unit:min)
209 )))|(% style="width:186px" %)(((
210 Alarm status(Only used in
211 LDS02)Always:0x00
212 )))
213
214 **Example:**
215
216 [[image:1654672186477-234.png]]
217
218
219 (((
220 Example Payload Decoder in TTN V3:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
221 )))
222
223
224 == 4.4 Downlink Payload ==
225
226
227 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
228 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
229 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
230 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
231 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
232 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
233 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
234 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
235 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
236
237 Example Downlink payload setting in TTN V3:
238
239 [[image:1654673412319-976.png]]
240
241
242 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
243
244 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
245
246
247 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
248
249 If payload = 0x04FF, it will reset the LWL02.
250
251
252 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
253
254 0x05 00: Set uplink to LoRaWAN unconfirmed mode
255
256 0x05 01: Set uplink to LoRaWAN confirmed mode
257
258
259 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
260
261 Example: 0xA601: Clear Counting
262 For LWL02: reset both count number and time.
263
264
265 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
266
267 0xA7 01 : Equal to AT+DISALARM=1
268
269 0xA7 00 : Equal to AT+DISALARM=0
270
271
272 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
273
274 Format: 0xA8 aa bb
275
276 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
277
278 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
279
280 Example: 0x A8 00 02 : Set ADR=0 and DR=1
281
282
283 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
284
285 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
286
287
288 == 4.5 Integrate with Datacake ==
289
290
291 (((
292 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:
293 )))
294
295
296 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
297
298 (% 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:
299
300
301 [[image:1654674520913-519.png]]
302
303
304 [[image:1654674530910-914.png]]
305
306
307 [[image:1654674543078-401.png]]
308
309
310 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
311
312 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
313
314 [[image:1654674556510-911.png]]
315
316
317 == 4.6 Alarm Base on Timeout ==
318
319
320 (((
321 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.
322
323 (% 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）**
324 )))
325
326 (((
327 User configure this feature by using:
328 )))
329
330 (((
331
332 )))
333
334 (((
335 (% style="color:blue" %)**AT Command**(%%) to configure:
336 )))
337
338 * (((
339 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
340 )))
341
342 (((
343 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.
344 )))
345
346 * (((
347 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
348
349
350
351 )))
352
353 (((
354 (% style="color:blue" %)**Downlink Command**(%%) to configure:
355 )))
356
357 (((
358 **Command: 0xA9 aa bb cc**
359 )))
360
361 (((
362 A9: Command Type Code
363 )))
364
365 (((
366 aa: status to be monitor
367 )))
368
369 (((
370 bb cc: timeout.
371 )))
372
373 (((
374
375 )))
376
377 (((
378 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
379 )))
380
381 (((
382 Or
383 )))
384
385 (((
386 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
387
388
389 )))
390
391 == 4.7 LEDs ==
392
393
394 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
395 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
396 |(% 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(%%)**
397 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
398 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
399 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
400
401
402 = 5. Battery & How to replace =
403
404 == 5.1 Battery Type and replace ==
405
406
407 (((
408 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:
409 )))
410
411 1. (((
412 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
413 )))
414 1. (((
415 Make sure the direction is correct when install the AAA batteries.
416 )))
417
418 (((
419 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
420 )))
421
422 (((
423
424 )))
425
426 (((
427 Example of AAA LR03 batter:
428 )))
429
430 [[image:1654675278044-307.png]]
431
432
433 == 5.2 Power Consumption Analyze ==
434
435
436 (((
437 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:
438 )))
439
440 (((
441 [[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]]
442 )))
443
444
445 = 6. Use AT Command =
446
447 == 6.1 Access AT Command ==
448
449
450 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
451
452 [[image:image-20221226104917-1.png||height="557" width="850"]]
453
454
455 (((
456 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:
457 )))
458
459 (((
460 The AT Access password is (% style="color:red" %)**123456**.
461 )))
462
463 [[image:1654675618022-630.png]]
464
465
466 (((
467 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
468 )))
469
470 (((
471 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.
472 )))
473
474 (((
475 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/]]
476 )))
477
478
479 = 7. FAQ =
480
481 == 7.1 How to upgrade the image? ==
482
483
484 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]]
485
486
487 == 7.2 How to change the LoRa Frequency Bands/Region? ==
488
489
490 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.
491
492
493 == 7.3 Can I disable uplink for each event to save battery life? ==
494
495
496 Yes, User can use below method to disable this:
497
498
499 (% style="color:blue" %)**via AT Command**:
500
501 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
502
503 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
504
505
506 (% style="color:blue" %)**via LoRaWAN downlink Command**:
507
508 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
509
510 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
511
512
513 == 7.4 How to change Sub-Band for LWL02? ==
514
515
516 (% 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:
517
518 * Press rest button.
519 * Send (% style="color:#037691" %)**123456**(%%) password
520 * Send command (% style="color:#037691" %)**AT+CFREQBANDMASK=0001 **(%%)( 0001 for subband 1, 0002 for subband 2, etc..)
521 * Press rest button to restart to new subband
522 * Example output:
523
524 (% class="mark small" %)[3369]DRAGINO LWL01 Device
525 [3370]Frequency Band: US915 v1.5
526 [3373]OTAA
527 [3374]DevEui= 7896785455246354
528 [3377]class type A
529 [3379]freq mode intra(%%)
530 (% class="mark mark small small" %)[3381]**scan chn mask 0x0002   ~-~-> use subband 2**
531
532 (% class="mark small" %)LM502:~~# [10793]txDone
533 123456       ~-~-> ENTER PASSWORD
534 Correct Password
535
536 (% class="mark small" %)[105115]rxTimeOut
537 **AT+CFREQBANDMASK=0001   ~-~-> Change to Subband1**
538 OK
539
540 (% class="mark small" %)[3371]DRAGINO LWL01 Device
541 [3373]Frequency Band: US915 v1.5
542 [3376]OTAA
543 [3377]DevEui= 7896785455246354
544 [3380]class type A
545 [3382]freq mode intra
546 [3384]**scan chn mask 0x0001  ~-~-> reboot and works on Subband1 now**
547
548
549 (% 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.
550
551
552 == 7.5 My sensor works for Helium AU915 before but not it doesn't work, Why? ==
553
554
555 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.
556
557
558 = 8. Order Info =
559
560
561 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
562
563 (% style="color:blue" %)**XXX:**
564
565 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
566 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
567 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
568 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
569 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
570 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
571 * (% style="color:red" %)**US915**(%%): frequency bands  US915
572 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
573 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
574
575
576 = 9. Packing Info =
577
578
579 **Package Includes**:
580
581 * LWL02 x 1
582
583
584 = 10. Support =
585
586
587 * 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.
588 * 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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