Version 31.5 by Xiaoling on 2022/06/08 17:04
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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
166 (% 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.
167
168 [[image:1654671889112-678.png]]
169
170
171 == 4.3 Uplink Payload ==
172
173
174 Uplink Payload total 9 bytes.
175
176 [[image:image-20220608150921-5.png]]
177
178
179 **Example:**
180
181 [[image:1654672186477-234.png]]
182
183
184 (((
185 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/]]
186 )))
187
188
189 == 4.4 Downlink Payload ==
190
191
192 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
193 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
194 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
195 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
196 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
197 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
198 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
199 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
200 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
201
202 Example Downlink payload setting in TTN V3:
203
204 [[image:1654673412319-976.png]]
205
206
207 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
208
209 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
210
211
212 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
213
214 If payload = 0x04FF, it will reset the LWL02.
215
216
217 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
218
219 0x05 00: Set uplink to LoRaWAN unconfirmed mode
220
221 0x05 01: Set uplink to LoRaWAN confirmed mode
222
223
224 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
225
226 Example: 0xA601: Clear Counting
227 For LWL02: reset both count number and time.
228
229
230 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
231
232 0xA7 01 : Equal to AT+DISALARM=1
233
234 0xA7 00 : Equal to AT+DISALARM=0
235
236
237 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
238
239 Format: 0xA8 aa bb
240
241 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
242
243 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
244
245 Example: 0x A8 00 02 : Set ADR=0 and DR=1
246
247
248 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
249
250 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
251
252
253 == 4.5 Integrate with Datacake ==
254
255 (((
256 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:
257 )))
258
259
260 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
261
262 (% 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:
263
264
265 [[image:1654674520913-519.png]]
266
267
268 [[image:1654674530910-914.png]]
269
270
271 [[image:1654674543078-401.png]]
272
273
274 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
275
276 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
277
278 [[image:1654674556510-911.png]]
279
280
281 == 4.6 Alarm Base on Timeout ==
282
283 (((
284 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.
285 )))
286
287 (((
288 User configure this feature by using:
289 )))
290
291 (((
292
293 )))
294
295 (((
296 (% style="color:blue" %)**AT Command**(%%) to configure:
297 )))
298
299 * (((
300 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
301 )))
302
303 (((
304 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.
305 )))
306
307 * (((
308 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
309 )))
310
311 (((
312 (% style="color:blue" %)**Downlink Command**(%%) to configure:
313 )))
314
315 (((
316 **Command: 0xA9 aa bb cc**
317 )))
318
319 (((
320 A9: Command Type Code
321 )))
322
323 (((
324 aa: status to be monitor
325 )))
326
327 (((
328 bb cc: timeout.
329 )))
330
331 (((
332
333 )))
334
335 (((
336 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
337 )))
338
339 (((
340 Or
341 )))
342
343 (((
344 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
345 )))
346
347
348
349 == 4.7 LEDs ==
350
351
352 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
353 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
354 |(% 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(%%)**
355 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
356 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
357 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
358
359
360
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
491
492 = 9. Packing Info =
493
494
495 **Package Includes**:
496
497 * LWL02 x 1
498
499
500
501
502 = 10. Support =
503
504 * 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.
505 * 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]].
506
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