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2 -[[image:1654669760488-506.png||height="510" width="769"]]
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6 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png]]
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9 9  
10 -= 1. Introduction =
11 11  
12 -== 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
13 13  
14 14  
15 -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.
16 16  
17 -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.
14 +1. Introduction
15 +11. What is LWL02 LoRaWAN Water Leak Sensor
18 18  
19 -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.
17 +The Dragino LWL02 is a 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.
20 20  
21 -Each LWL02 is (% style="color:#4f81bd" %)**pre-load with a set of unique keys**(%%) for LoRaWAN registration, register these keys to
22 22  
20 +LWL02 is powered by 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.
21 +
22 +
23 +The LWL02 will send periodically data every day as well as for each water leak event. It also counts the water leak times and 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.
24 +
25 +
26 +Each LWL02 is pre-load with a set of unique keys for LoRaWAN registration, register these keys to
27 +
23 23  LoRaWAN server and it will auto connect after power on. [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image002.png]]
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25 25  
26 26  
27 27  
28 -*
33 +*
29 29  *1. Features
30 30  * LoRaWAN Class A v1.0.3
31 31  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
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37 37  * Remote configure parameters via LoRa Downlink
38 38  * Firmware upgradable via program port
39 39  
40 -*
45 +*
41 41  *1. Applications
42 42  * Smart Buildings & Home Automation
43 43  * Logistics and Supply Chain Management
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46 46  * Smart Cities
47 47  * Smart Factory
48 48  
49 -1.
54 +1.
50 50  11. Dimension
51 51  
52 52  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image003.png]]
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97 97  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>>path:#AT_Command]] to set the keys in the devices.
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99 99  
100 -1.
105 +1.
101 101  11. Example to join LoRaWAN network
102 102  
103 103  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. 
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113 113  * A periodically update at every 10 minutes when in water leak.
114 114  * A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>path:#Alarm]])
115 115  
121 +
116 116  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:
117 117  
118 118  **Step 1**: Create a device in TTN V3 with the OTAA keys from LWL02.
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182 182  
183 183  
184 184  
185 -1.
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186 186  11. Downlink Payload
187 187  
188 188  |**Downlink Control Type**|**Type Code**|**Downlink payload size(bytes)**
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195 195  |[[Set Alarm Timeout>>path:#Alarm_Timeout]]|0xA9|4
196 196  
197 197  
204 +
198 198  Example Downlink payload setting in TTN V3:
199 199  
200 200  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
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248 248  
249 249  
250 -1.
257 +1.
251 251  11. Integrate with Datacake
252 252  
253 253  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:
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315 -1.
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316 316  11. LEDs
317 317  
318 318  |**Action**|**LED behavior**
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322 322  |Got a downlink message|**BLUE LED** blinks once
323 323  
324 324  
332 +
325 325  1. Battery & How to replace
326 326  11. Battery Type and replace
327 327  

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