Version 33.10 by Xiaoling on 2022/06/14 15:28
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1 (% style="text-align:center" %)
2 [[image:1654669760488-506.png||height="510" width="769"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14 = 1. Introduction =
15
16 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
17
18
19 (((
20 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.
21 )))
22
23 (((
24 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.
25 )))
26
27 (((
28 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.
29 )))
30
31 (((
32 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.
33 )))
34
35 [[image:image-20220608143744-1.png]]
36
37
38
39 == 1.2 Features ==
40
41 * LoRaWAN Class A v1.0.3
42 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
43 * SX1262 LoRa Core
44 * Water Leak detect
45 * 2 x AAA LR03 Batteries
46 * AT Commands to change parameters
47 * Uplink on periodically and open/close action
48 * Remote configure parameters via LoRa Downlink
49 * Firmware upgradable via program port
50
51
52
53
54 == 1.3 Applications ==
55
56 * Smart Buildings & Home Automation
57 * Logistics and Supply Chain Management
58 * Smart Metering
59 * Smart Agriculture
60 * Smart Cities
61 * Smart Factory
62
63
64
65
66 == 1.4 Dimension ==
67
68 [[image:image-20220608143952-2.png]]
69
70 [[image:1654670405145-346.png]]
71
72
73
74 == 1.5 Firmware Change log ==
75
76 (((
77 LWL02 use the same firmware as LDS01.
78 )))
79
80 (((
81 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
82 )))
83
84
85 = 2. Power ON LWL02 =
86
87 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.
88
89
90 = 3. How to install LWL02 =
91
92 (((
93 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.
94 )))
95
96 [[image:image-20220608144447-4.png]]
97
98
99
100 = 4. Operation Mode =
101
102 == 4.1 How it works? ==
103
104 (((
105 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.
106 )))
107
108 (((
109 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.
110 )))
111
112
113 == 4.2 Example to join LoRaWAN network ==
114
115 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. 
116
117 [[image:1654671007127-335.png]]
118
119
120 (((
121 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.
122 )))
123
124 * (((
125 A keep-alive message which send once per day.
126 )))
127 * (((
128 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
129 )))
130 * (((
131 A periodically update at every 10 minutes when in water leak.
132 )))
133 * (((
134 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
135 )))
136
137 (((
138
139
140 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:
141 )))
142
143 (((
144 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
145 )))
146
147 (((
148 Each LWL02 is shipped with a sticker with unique device EUI:
149 )))
150
151 [[image:1654671040430-368.png]]
152
153
154 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
155
156 **Add APP EUI in the application**
157
158 [[image:1654671794691-956.png]]
159
160
161 [[image:1654671809850-574.png]]
162
163 [[image:1654671820156-640.png]]
164
165
166 [[image:1654671832011-696.png]]
167
168
169 **Add APP KEY and DEV EUI**
170
171 [[image:1654671889112-678.png]]
172
173
174 (% 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.
175
176
177 [[image:1654681465260-713.png]]
178
179
180
181 == 4.3 Uplink Payload ==
182
183
184 Uplink Payload total 9 bytes.
185
186 [[image:image-20220608150921-5.png]]
187
188
189 **Example:**
190
191 [[image:1654672186477-234.png]]
192
193
194 (((
195 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/]]
196 )))
197
198
199 == 4.4 Downlink Payload ==
200
201
202 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
203 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
204 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
205 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
206 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
207 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
208 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
209 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
210 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
211
212 Example Downlink payload setting in TTN V3:
213
214 [[image:1654673412319-976.png]]
215
216
217 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
218
219 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
220
221
222 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
223
224 If payload = 0x04FF, it will reset the LWL02.
225
226
227 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
228
229 0x05 00: Set uplink to LoRaWAN unconfirmed mode
230
231 0x05 01: Set uplink to LoRaWAN confirmed mode
232
233
234 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
235
236 Example: 0xA601: Clear Counting
237 For LWL02: reset both count number and time.
238
239
240 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
241
242 0xA7 01 : Equal to AT+DISALARM=1
243
244 0xA7 00 : Equal to AT+DISALARM=0
245
246
247 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
248
249 Format: 0xA8 aa bb
250
251 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
252
253 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
254
255 Example: 0x A8 00 02 : Set ADR=0 and DR=1
256
257
258 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
259
260 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
261
262
263 == 4.5 Integrate with Datacake ==
264
265 (((
266 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:
267 )))
268
269
270 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
271
272 (% 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:
273
274
275 [[image:1654674520913-519.png]]
276
277
278 [[image:1654674530910-914.png]]
279
280
281 [[image:1654674543078-401.png]]
282
283
284 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
285
286 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
287
288 [[image:1654674556510-911.png]]
289
290
291 == 4.6 Alarm Base on Timeout ==
292
293 (((
294 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.
295 )))
296
297 (((
298 User configure this feature by using:
299 )))
300
301 (((
302
303 )))
304
305 (((
306 (% style="color:blue" %)**AT Command**(%%) to configure:
307 )))
308
309 * (((
310 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
311 )))
312
313 (((
314 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.
315 )))
316
317 * (((
318 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
319 )))
320
321 (((
322 (% style="color:blue" %)**Downlink Command**(%%) to configure:
323 )))
324
325 (((
326 **Command: 0xA9 aa bb cc**
327 )))
328
329 (((
330 A9: Command Type Code
331 )))
332
333 (((
334 aa: status to be monitor
335 )))
336
337 (((
338 bb cc: timeout.
339 )))
340
341 (((
342
343 )))
344
345 (((
346 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
347 )))
348
349 (((
350 Or
351 )))
352
353 (((
354 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
355 )))
356
357
358
359 == 4.7 LEDs ==
360
361
362 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
363 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
364 |(% 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(%%)**
365 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
366 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
367 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
368
369
370
371
372 = 5. Battery & How to replace =
373
374 == 5.1 Battery Type and replace ==
375
376 (((
377 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:
378 )))
379
380 1. (((
381 The LWL02 doesn’t have any screw, use can use nail to open it by the middle.
382 )))
383 1. (((
384 Make sure the direction is correct when install the AAA batteries.
385 )))
386
387 (((
388 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn’t have broken surface.**
389 )))
390
391 (((
392
393 )))
394
395 (((
396 Example of AAA LR03 batter:
397 )))
398
399 [[image:1654675278044-307.png]]
400
401
402 == 5.2 Power Consumption Analyze ==
403
404 (((
405 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:
406 )))
407
408 (((
409 [[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]]
410 )))
411
412
413 = 6. Use AT Command =
414
415 == 6.1 Access AT Command ==
416
417 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
418
419 [[image:image-20220608160336-1.png]]
420
421
422 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
423
424 (% style="background-color:yellow" %)**RX <- -> TX**
425
426 (% style="background-color:yellow" %)**TX <- -> RX**
427
428 (% style="background-color:yellow" %)**GND <- -> GND**
429
430
431 (((
432 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:
433 )))
434
435 (((
436 The AT Access password is (% style="color:red" %)**123456**.
437 )))
438
439 [[image:1654675618022-630.png]]
440
441 (((
442 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
443 )))
444
445 (((
446 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.
447 )))
448
449 (((
450 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/]]
451 )))
452
453
454 = 7. FAQ =
455
456 == 7.1 How to upgrade the image? ==
457
458 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]]
459
460
461 == 7.2 How to change the LoRa Frequency Bands/Region? ==
462
463 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.
464
465
466 == 7.3 Can I disable uplink for each event to save battery life? ==
467
468 Yes, User can use below method to disable this:
469
470 (% style="color:#4f81bd" %)**via AT Command**:
471
472 AT+DISALARM=1,  End node will only send packet in TDC time.
473
474 AT+DISALARM=0,  End node will send packet in TDC time or status change for door sensor. 
475
476
477 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
478
479 0xA701 :  Equal to AT+DISALARM=1
480
481 0xA700 :  Equal to AT+DISALARM=0
482
483
484 = 8. Order Info =
485
486 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
487
488 (% style="color:blue" %)**XXX:**
489
490 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
491 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
492 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
493 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
494 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
495 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
496 * (% style="color:red" %)**US915**(%%): frequency bands  US915
497 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
498 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
499
500
501
502
503 = 9. Packing Info =
504
505 **Package Includes**:
506
507 * LWL02 x 1
508
509
510
511
512 = 10. Support =
513
514 * 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.
515 * 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]].
516
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