Version 32.8 by Xiaoling on 2022/06/08 17:44
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1 (% style="text-align:center" %)
2 [[image:1654669760488-506.png||height="510" width="769"]]
3
4
5
6 **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 == 1.3 Applications ==
52
53 * Smart Buildings & Home Automation
54 * Logistics and Supply Chain Management
55 * Smart Metering
56 * Smart Agriculture
57 * Smart Cities
58 * Smart Factory
59
60 == 1.4 Dimension ==
61
62 [[image:image-20220608143952-2.png]]
63
64 [[image:1654670405145-346.png]]
65
66
67
68 == 1.5 Firmware Change log ==
69
70 (((
71 LWL02 use the same firmware as LDS01.
72 )))
73
74 (((
75 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
76 )))
77
78
79 = 2. Power ON LWL02 =
80
81 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.
82
83
84 = 3. How to install LWL02 =
85
86 (((
87 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.
88 )))
89
90 [[image:image-20220608144447-4.png]]
91
92
93
94 = 4. Operation Mode =
95
96 == 4.1 How it works? ==
97
98 (((
99 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.
100 )))
101
102 (((
103 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.
104 )))
105
106
107 == 4.2 Example to join LoRaWAN network ==
108
109 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. 
110
111 [[image:1654671007127-335.png]]
112
113
114 (((
115 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.
116 )))
117
118 * (((
119 A keep-alive message which send once per day.
120 )))
121 * (((
122 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
123 )))
124 * (((
125 A periodically update at every 10 minutes when in water leak.
126 )))
127 * (((
128 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
129 )))
130
131 (((
132
133
134 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:
135 )))
136
137 (((
138 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
139 )))
140
141 (((
142 Each LWL02 is shipped with a sticker with unique device EUI:
143 )))
144
145 [[image:1654671040430-368.png]]
146
147
148 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
149
150 **Add APP EUI in the application**
151
152 [[image:1654671794691-956.png]]
153
154
155 [[image:1654671809850-574.png]]
156
157 [[image:1654671820156-640.png]]
158
159
160 [[image:1654671832011-696.png]]
161
162
163 **Add APP KEY and DEV EUI**
164
165 [[image:1654671889112-678.png]]
166
167
168 (% 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.
169
170
171
172
173
174 == 4.3 Uplink Payload ==
175
176
177 Uplink Payload total 9 bytes.
178
179 [[image:image-20220608150921-5.png]]
180
181
182 **Example:**
183
184 [[image:1654672186477-234.png]]
185
186
187 (((
188 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/]]
189 )))
190
191
192 == 4.4 Downlink Payload ==
193
194
195 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
196 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
197 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
198 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
199 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
200 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
201 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
202 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
203 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
204
205 Example Downlink payload setting in TTN V3:
206
207 [[image:1654673412319-976.png]]
208
209
210 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
211
212 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
213
214
215 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
216
217 If payload = 0x04FF, it will reset the LWL02.
218
219
220 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
221
222 0x05 00: Set uplink to LoRaWAN unconfirmed mode
223
224 0x05 01: Set uplink to LoRaWAN confirmed mode
225
226
227 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
228
229 Example: 0xA601: Clear Counting
230 For LWL02: reset both count number and time.
231
232
233 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
234
235 0xA7 01 : Equal to AT+DISALARM=1
236
237 0xA7 00 : Equal to AT+DISALARM=0
238
239
240 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
241
242 Format: 0xA8 aa bb
243
244 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
245
246 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
247
248 Example: 0x A8 00 02 : Set ADR=0 and DR=1
249
250
251 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
252
253 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
254
255
256 == 4.5 Integrate with Datacake ==
257
258 (((
259 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:
260 )))
261
262
263 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
264
265 (% 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:
266
267
268 [[image:1654674520913-519.png]]
269
270
271 [[image:1654674530910-914.png]]
272
273
274 [[image:1654674543078-401.png]]
275
276
277 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
278
279 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
280
281 [[image:1654674556510-911.png]]
282
283
284 == 4.6 Alarm Base on Timeout ==
285
286 (((
287 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.
288 )))
289
290 (((
291 User configure this feature by using:
292 )))
293
294 (((
295
296 )))
297
298 (((
299 (% style="color:blue" %)**AT Command**(%%) to configure:
300 )))
301
302 * (((
303 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
304 )))
305
306 (((
307 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.
308 )))
309
310 * (((
311 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
312 )))
313
314 (((
315 (% style="color:blue" %)**Downlink Command**(%%) to configure:
316 )))
317
318 (((
319 **Command: 0xA9 aa bb cc**
320 )))
321
322 (((
323 A9: Command Type Code
324 )))
325
326 (((
327 aa: status to be monitor
328 )))
329
330 (((
331 bb cc: timeout.
332 )))
333
334 (((
335
336 )))
337
338 (((
339 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
340 )))
341
342 (((
343 Or
344 )))
345
346 (((
347 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
348 )))
349
350
351
352 == 4.7 LEDs ==
353
354
355 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
356 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
357 |(% 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(%%)**
358 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
359 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
360 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
361
362 = 5. Battery & How to replace =
363
364 == 5.1 Battery Type and replace ==
365
366 (((
367 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:
368 )))
369
370 1. (((
371 The LWL02 doesn’t have any screw, use can use nail to open it by the middle.
372 )))
373 1. (((
374 Make sure the direction is correct when install the AAA batteries.
375 )))
376
377 (((
378 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn’t have broken surface.**
379 )))
380
381 (((
382
383 )))
384
385 (((
386 Example of AAA LR03 batter:
387 )))
388
389 [[image:1654675278044-307.png]]
390
391
392 == 5.2 Power Consumption Analyze ==
393
394 (((
395 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:
396 )))
397
398 (((
399 [[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]]
400 )))
401
402
403 = 6. Use AT Command =
404
405 == 6.1 Access AT Command ==
406
407 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
408
409 [[image:image-20220608160336-1.png]]
410
411
412 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
413
414 (% style="background-color:yellow" %)**RX <- -> TX**
415
416 (% style="background-color:yellow" %)**TX <- -> RX**
417
418 (% style="background-color:yellow" %)**GND <- -> GND**
419
420
421 (((
422 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:
423 )))
424
425 (((
426 The AT Access password is (% style="color:red" %)**123456**.
427 )))
428
429 [[image:1654675618022-630.png]]
430
431 (((
432 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
433 )))
434
435 (((
436 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.
437 )))
438
439 (((
440 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/]]
441 )))
442
443
444 = 7. FAQ =
445
446 == 7.1 How to upgrade the image? ==
447
448 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]]
449
450
451 == 7.2 How to change the LoRa Frequency Bands/Region? ==
452
453 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.
454
455
456 == 7.3 Can I disable uplink for each event to save battery life? ==
457
458 Yes, User can use below method to disable this:
459
460 (% style="color:#4f81bd" %)**via AT Command**:
461
462 AT+DISALARM=1, End node will only send packet in TDC time.
463
464 AT+DISALARM=0, End node will send packet in TDC time or status change for door sensor. 
465
466 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
467
468 0xA701 : Equal to AT+DISALARM=1
469
470 0xA700 : Equal to AT+DISALARM=0
471
472
473 = 8. Order Info =
474
475 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
476
477 (% style="color:blue" %)**XXX:**
478
479 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
480 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
481 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
482 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
483 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
484 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
485 * (% style="color:red" %)**US915**(%%): frequency bands  US915
486 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
487 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
488
489
490 = 9. Packing Info =
491
492 **Package Includes**:
493
494 * LWL02 x 1
495
496
497 = 10. Support =
498
499 * 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.
500 * 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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