Version 39.1 by Bei Jinggeng on 2022/08/16 11:27
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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 == 1.3 Applications ==
64
65 * Smart Buildings & Home Automation
66 * Logistics and Supply Chain Management
67 * Smart Metering
68 * Smart Agriculture
69 * Smart Cities
70 * Smart Factory
71
72
73 == 1.4 Dimension ==
74
75 [[image:image-20220608143952-2.png]]
76
77 [[image:1654670405145-346.png]]
78
79
80
81 == 1.5 Firmware Change log ==
82
83 (((
84 LWL02 use the same firmware as LDS01.
85 )))
86
87 (((
88 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
89 )))
90
91
92 = 2. Power ON LWL02 =
93
94 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.
95
96
97 = 3. How to install LWL02 =
98
99 (((
100 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.
101 )))
102
103 [[image:image-20220608144447-4.png]]
104
105
106
107 = 4. Operation Mode =
108
109 == 4.1 How it works? ==
110
111 (((
112 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.
113 )))
114
115 (((
116 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.
117 )))
118
119
120 == 4.2 Example to join LoRaWAN network ==
121
122 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. 
123
124 [[image:1654671007127-335.png]]
125
126
127 (((
128 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.
129 )))
130
131 * (((
132 A keep-alive message which send once per day.
133 )))
134 * (((
135 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
136 )))
137 * (((
138 A periodically update at every 10 minutes when in water leak.
139 )))
140 * (((
141 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
142 )))
143
144 (((
145
146
147 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:
148 )))
149
150 (((
151 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
152 )))
153
154 (((
155 Each LWL02 is shipped with a sticker with unique device EUI:
156 )))
157
158 [[image:1654671040430-368.png]]
159
160
161 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
162
163 **Add APP EUI in the application**
164
165 [[image:1654671794691-956.png]]
166
167
168 [[image:1654671809850-574.png]]
169
170 [[image:1654671820156-640.png]]
171
172
173 [[image:1654671832011-696.png]]
174
175
176 **Add APP KEY and DEV EUI**
177
178 [[image:1654671889112-678.png]]
179
180
181 (% 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.
182
183
184 [[image:1654681465260-713.png]]
185
186
187
188 == 4.3 Uplink Payload ==
189
190
191 Uplink Payload total 9 bytes.
192
193 [[image:image-20220608150921-5.png]]
194
195
196 **Example:**
197
198 [[image:1654672186477-234.png]]
199
200
201 (((
202 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/]]
203 )))
204
205
206 == 4.4 Downlink Payload ==
207
208
209 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
210 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
211 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
212 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
213 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
214 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
215 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
216 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
217 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
218
219 Example Downlink payload setting in TTN V3:
220
221 [[image:1654673412319-976.png]]
222
223
224 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
225
226 If the payload=0100003C, means to control the LWL02's Keep Alive interval to 0x00003C=60(S)
227
228
229 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
230
231 If payload = 0x04FF, it will reset the LWL02.
232
233
234 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
235
236 0x05 00: Set uplink to LoRaWAN unconfirmed mode
237
238 0x05 01: Set uplink to LoRaWAN confirmed mode
239
240
241 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
242
243 Example: 0xA601: Clear Counting
244 For LWL02: reset both count number and time.
245
246
247 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
248
249 0xA7 01 : Equal to AT+DISALARM=1
250
251 0xA7 00 : Equal to AT+DISALARM=0
252
253
254 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
255
256 Format: 0xA8 aa bb
257
258 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
259
260 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
261
262 Example: 0x A8 00 02 : Set ADR=0 and DR=1
263
264
265 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
266
267 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
268
269
270 == 4.5 Integrate with Datacake ==
271
272 (((
273 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:
274 )))
275
276
277 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
278
279 (% 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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281
282 [[image:1654674520913-519.png]]
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285 [[image:1654674530910-914.png]]
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288 [[image:1654674543078-401.png]]
289
290
291 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
292
293 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
294
295 [[image:1654674556510-911.png]]
296
297
298 == 4.6 Alarm Base on Timeout ==
299
300 (((
301 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.
302 )))
303
304 (((
305 User configure this feature by using:
306 )))
307
308 (((
309
310 )))
311
312 (((
313 (% style="color:blue" %)**AT Command**(%%) to configure:
314 )))
315
316 * (((
317 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
318 )))
319
320 (((
321 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.
322 )))
323
324 * (((
325 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
326 )))
327
328 (((
329 (% style="color:blue" %)**Downlink Command**(%%) to configure:
330 )))
331
332 (((
333 **Command: 0xA9 aa bb cc**
334 )))
335
336 (((
337 A9: Command Type Code
338 )))
339
340 (((
341 aa: status to be monitor
342 )))
343
344 (((
345 bb cc: timeout.
346 )))
347
348 (((
349
350 )))
351
352 (((
353 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
354 )))
355
356 (((
357 Or
358 )))
359
360 (((
361 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
362 )))
363
364 == 4.7 LEDs ==
365
366
367 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
368 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
369 |(% 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(%%)**
370 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
371 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
372 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
373
374
375 = 5. Battery & How to replace =
376
377 == 5.1 Battery Type and replace ==
378
379 (((
380 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:
381 )))
382
383 1. (((
384 The LWL02 doesn't have any screw, use can use nail to open it by the middle.
385 )))
386 1. (((
387 Make sure the direction is correct when install the AAA batteries.
388 )))
389
390 (((
391 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn't have broken surface.**
392 )))
393
394 (((
395
396 )))
397
398 (((
399 Example of AAA LR03 batter:
400 )))
401
402 [[image:1654675278044-307.png]]
403
404
405 == 5.2 Power Consumption Analyze ==
406
407 (((
408 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:
409 )))
410
411 (((
412 [[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]]
413 )))
414
415
416 = 6. Use AT Command =
417
418 == 6.1 Access AT Command ==
419
420 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
421
422 [[image:image-20220608160336-1.png]]
423
424
425 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
426
427 (% style="background-color:yellow" %)**RX <- -> TX**
428
429 (% style="background-color:yellow" %)**TX <- -> RX**
430
431 (% style="background-color:yellow" %)**GND <- -> GND**
432
433
434 (((
435 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:
436 )))
437
438 (((
439 The AT Access password is (% style="color:red" %)**123456**.
440 )))
441
442 [[image:1654675618022-630.png]]
443
444 (((
445 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
446 )))
447
448 (((
449 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.
450 )))
451
452 (((
453 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/]]
454 )))
455
456
457 = 7. FAQ =
458
459 == 7.1 How to upgrade the image? ==
460
461 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]]
462
463
464 == 7.2 How to change the LoRa Frequency Bands/Region? ==
465
466 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.
467
468
469 == 7.3 Can I disable uplink for each event to save battery life? ==
470
471 Yes, User can use below method to disable this:
472
473 (% style="color:#4f81bd" %)**via AT Command**:
474
475 AT+DISALARM=1,  End node will only send packet in TDC time.
476
477 AT+DISALARM=0,  End node will send packet in TDC time or status change for door sensor. 
478
479
480 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
481
482 0xA701 :  Equal to AT+DISALARM=1
483
484 0xA700 :  Equal to AT+DISALARM=0
485
486
487 = 8. Order Info =
488
489 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
490
491 (% style="color:blue" %)**XXX:**
492
493 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
494 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
495 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
496 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
497 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
498 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
499 * (% style="color:red" %)**US915**(%%): frequency bands  US915
500 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
501 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
502
503
504 = 9. Packing Info =
505
506 **Package Includes**:
507
508 * LWL02 x 1
509
510
511 = 10. Support =
512
513 * 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.
514 * 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]].
515
516

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