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4 [[image:image-20220927133941-2.png]]
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13 **Table of Contents:**
14
15 {{toc/}}
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23
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 )))
47
48 [[image:image-20220927113420-3.png]]
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 == 1.3 Storage & Operation Temperature ==
65
66
67 -10 ~~ 50 °C  or -40 ~~ 60 °C (depends on battery type, see [[FAQ>>||anchor="H7.6Whyiseedifferentworkingtemperatureforthedevice3F"]])
68
69
70 == 1.4 Applications ==
71
72
73 * Smart Buildings & Home Automation
74 * Logistics and Supply Chain Management
75 * Smart Metering
76 * Smart Agriculture
77 * Smart Cities
78 * Smart Factory
79
80 == 1.5 Dimension ==
81
82
83 [[image:image-20220608143952-2.png]]
84
85
86 [[image:1654670405145-346.png]]
87
88
89 == 1.6 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 = 2. Power ON LWL02 =
98
99
100 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.
101
102
103 = 3. How to install LWL02 =
104
105 Fixed way:
106
107 * Open the shell, screw through the reserved mounting hole, fix the bottom of the shell at the fixed position, and install the main body of the node.
108
109 [[image:image-20231222114059-1.jpeg||height="412" width="624"]]
110
111 * Stick the double-sided glue on the bottom of the shell, and stick it directly in the fixed position.
112
113 [[image:image-20231222114211-2.jpeg||height="409" width="613"]]
114
115
116 (((
117 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.
118
119
120 )))
121
122 [[image:image-20220608144447-4.png]]
123
124
125 = 4. Operation Mode =
126
127 == 4.1 How it works? ==
128
129
130 (((
131 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.
132 )))
133
134 (((
135 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.
136 )))
137
138
139 == 4.2 Example to join LoRaWAN network ==
140
141
142 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. 
143
144 [[image:image-20220927113401-2.png]]
145
146
147 (((
148 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.
149 )))
150
151 * (((
152 A keep-alive message which send once per day.
153 )))
154 * (((
155 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
156 )))
157 * (((
158 A periodically update at every 10 minutes when in water leak.
159 )))
160 * (((
161 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
162 )))
163
164 (((
165
166
167 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:
168 )))
169
170 (((
171 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
172 )))
173
174 (((
175 Each LWL02 is shipped with a sticker with unique device EUI:
176 )))
177
178 [[image:image-20230426084834-1.png||height="239" width="515"]]
179
180
181 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
182
183
184 **Add APP EUI in the application**
185
186 [[image:1654671794691-956.png]]
187
188
189 [[image:1654671809850-574.png]]
190
191 [[image:1654671820156-640.png]]
192
193
194 [[image:1654671832011-696.png]]
195
196
197 **Add APP KEY and DEV EUI**
198
199 [[image:1654671889112-678.png]]
200
201
202
203 (% 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.
204
205
206 [[image:1654681465260-713.png]]
207
208
209 == 4.3 Uplink Payload ==
210
211
212 Uplink Payload total 10 bytes.
213
214 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:500px" %)
215 |(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:60px" %)**2**|(% style="background-color:#4f81bd; color:white; width:60px" %)**1**|(% style="background-color:#4f81bd; color:white; width:100px" %)**3**|(% style="background-color:#4f81bd; color:white; width:110px" %)**3**|(% style="background-color:#4f81bd; color:white; width:110px" %)**1**
216 |value|Status&BAT|(((
217 MOD
218 Always:0x02
219 )))|(% style="width:126px" %)Total_water_leak_events|(% style="width:140px" %)(((
220 Last  water leak duration(unit:min)
221 )))|(% style="width:186px" %)(((
222 Alarm status(Only used in
223 LWL02)Always:0x00
224 )))
225
226 **Example:**
227
228 [[image:1654672186477-234.png]]
229
230
231 (((
232 Example Payload Decoder in TTN V3:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder/tree/main/LWL02]]
233 )))
234
235
236 == 4.4 Downlink Payload ==
237
238
239 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:505px" %)
240 |=(% style="width: 182px;background-color:#4F81BD;color:white" %)**Downlink Control Type**|=(% style="width: 96px;background-color:#4F81BD;color:white" %)**Type Code**|=(% style="width: 227px;background-color:#4F81BD;color:white" %)**Downlink payload size(bytes)**
241 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
242 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
243 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
244 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
245 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
246 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
247 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
248
249 Example Downlink payload setting in TTN V3:
250
251 [[image:1654673412319-976.png]]
252
253
254 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
255
256 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
257
258
259 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
260
261 If payload = 0x04FF, it will reset the LWL02.
262
263
264 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
265
266 0x05 00: Set uplink to LoRaWAN unconfirmed mode
267
268 0x05 01: Set uplink to LoRaWAN confirmed mode
269
270
271 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
272
273 Example: 0xA601: Clear Counting
274 For LWL02: reset both count number and time.
275
276
277 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
278
279 0xA7 01 : Equal to AT+DISALARM=1
280
281 0xA7 00 : Equal to AT+DISALARM=0
282
283
284 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
285
286 Format: 0xA8 aa bb
287
288 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
289
290 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
291
292 Example: 0x A8 00 02 : Set ADR=0 and DR=1
293
294
295 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
296
297 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
298
299
300 == 4.5 Integrate with Datacake ==
301
302
303 (((
304 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:
305 )))
306
307
308 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
309
310 (% 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:
311
312
313 [[image:1654674520913-519.png]]
314
315
316 [[image:1654674530910-914.png]]
317
318
319 [[image:1654674543078-401.png]]
320
321
322 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
323
324 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
325
326 [[image:1654674556510-911.png]]
327
328
329 == 4.6 Alarm Base on Timeout ==
330
331
332 (((
333 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.
334
335 (% 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)**
336 )))
337
338 (((
339 User configure this feature by using:
340 )))
341
342 (((
343
344 )))
345
346 (((
347 (% style="color:blue" %)**AT Command**(%%) to configure:
348 )))
349
350 * (((
351 (% style="color:red" %)**AT+TTRIG=1,30 **(%%) **~-~->** When status change from close to open, and device keep in open
352 )))
353
354 (((
355 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.
356 )))
357
358 * (((
359 (% style="color:red" %)**AT+TTRIG=0,0** (%%) **~-~->**  Default Value, disable timeout Alarm.
360
361
362
363 )))
364
365 (((
366 (% style="color:blue" %)**Downlink Command**(%%) to configure:
367 )))
368
369 (((
370 **Command: 0xA9 aa bb cc**
371 )))
372
373 (((
374 A9: Command Type Code
375 )))
376
377 (((
378 aa: status to be monitor
379 )))
380
381 (((
382 bb cc: timeout.
383 )))
384
385 (((
386
387 )))
388
389 (((
390 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
391 )))
392
393 (((
394 Or
395 )))
396
397 (((
398 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
399
400
401 )))
402
403 == 4.7 LEDs ==
404
405
406 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:463px" %)
407 |=(% style="width: 186px;background-color:#4F81BD;color:white" %)**Action**|=(% style="width: 277px;background-color:#4F81BD;color:white" %)**LED behavior**
408 |(% 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(%%)**
409 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
410 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
411 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
412
413 = 5. Battery & How to replace =
414
415 == 5.1 Battery Type and replace ==
416
417
418 (((
419 LWL02 is equipped with 2 x AAA LR03 batteries. If the batteries running low(see 2.3~~2.5v in the platform). User can buy generic AAA battery and replace it. Note:
420 )))
421
422 1. (((
423 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
424 )))
425 1. (((
426 Make sure the direction is correct when install the AAA batteries.
427 )))
428
429 (((
430 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
431 )))
432
433 (((
434
435 )))
436
437 (((
438 Example of AAA LR03 batter:
439 )))
440
441 [[image:1654675278044-307.png]]
442
443
444 == 5.2 Power Consumption Analyze ==
445
446
447 (((
448 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:
449 )))
450
451 (((
452 [[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]]
453 )))
454
455
456 = 6. Use AT Command =
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 [[image:image-20221226104917-1.png||height="557" width="850"]]
464
465
466 (((
467 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:
468 )))
469
470 (((
471 The AT Access password is (% style="color:red" %)**123456**.
472 )))
473
474 [[image:1654675618022-630.png]]
475
476
477 (((
478 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
479 )))
480
481 (((
482 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.
483 )))
484
485 (((
486 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/]]
487 )))
488
489
490 = 7. FAQ =
491
492 == 7.1 How to upgrade the image? ==
493
494
495 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]]
496
497
498 == 7.2 How to change the LoRa Frequency Bands/Region? ==
499
500
501 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.
502
503
504 == 7.3 Can I disable uplink for each event to save battery life? ==
505
506
507 Yes, User can use below method to disable this:
508
509
510 (% style="color:blue" %)**via AT Command**:
511
512 (% style="color:red" %)**AT+DISALARM=1**(%%),  End node will only send packet in TDC time.
513
514 (% style="color:red" %)**AT+DISALARM=0**(%%),  End node will send packet in TDC time or status change for door sensor. 
515
516
517 (% style="color:blue" %)**via LoRaWAN downlink Command**:
518
519 (% style="color:red" %)**0xA701** (%%):  Equal to AT+DISALARM=1
520
521 (% style="color:red" %)**0xA700** (%%):  Equal to AT+DISALARM=0
522
523
524 == 7.4 How to change Sub-Band for LWL02? ==
525
526
527 (% 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:
528
529 * Press rest button.
530 * Send (% style="color:#037691" %)**123456**(%%) password
531 * Send command (% style="color:#037691" %)**AT+CFREQBANDMASK=0001 **(%%)( 0001 for subband 1, 0002 for subband 2, etc..)
532 * Press rest button to restart to new subband
533 * Example output:
534
535 (% class="mark small" %)[3369]DRAGINO LWL01 Device
536 [3370]Frequency Band: US915 v1.5
537 [3373]OTAA
538 [3374]DevEui= 7896785455246354
539 [3377]class type A
540 [3379]freq mode intra(%%)
541 (% class="mark mark small small" %)[3381]**scan chn mask 0x0002   ~-~-> use subband 2**
542
543 (% class="mark small" %)LM502:~~# [10793]txDone
544 123456       ~-~-> ENTER PASSWORD
545 Correct Password
546
547 (% class="mark small" %)[105115]rxTimeOut
548 **AT+CFREQBANDMASK=0001   ~-~-> Change to Subband1**
549 OK
550
551 (% class="mark small" %)[3371]DRAGINO LWL01 Device
552 [3373]Frequency Band: US915 v1.5
553 [3376]OTAA
554 [3377]DevEui= 7896785455246354
555 [3380]class type A
556 [3382]freq mode intra
557 [3384]**scan chn mask 0x0001  ~-~-> reboot and works on Subband1 now**
558
559
560 (% 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.
561
562
563 == 7.5 My sensor works for Helium AU915 before but not it doesn't work, Why? ==
564
565
566 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.
567
568
569 == 7.6 Why i see different working temperature for the device? ==
570
571
572 The working temperature range of device depends on the battery user choose.
573
574 * Normal AAA Battery can support -10 ~~ 50°C working range.
575 * Special AAA battery can support -40 ~~ 60 °C working range. For example: [[Energizer L92>>url:https://data.energizer.com/pdfs/l92.pdf]]
576
577 = 8. Order Info =
578
579
580 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
581
582 (% style="color:blue" %)**XXX:**
583
584 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
585 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
586 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
587 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
588 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
589 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
590 * (% style="color:red" %)**US915**(%%): frequency bands  US915
591 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
592 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
593
594 = 9. Packing Info =
595
596
597 **Package Includes**:
598
599 * LWL02 x 1
600
601 = 10. Support =
602
603
604 * 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.
605 * 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]].
606
607
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