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	6	+**Contents:**
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	8	+{{toc/}}
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10	10	= 1. Introduction =
11	11
12	12	== 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
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181	181	|=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
182	182	|(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
183	183	|(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
184		-|(% style="width:180px" %)[[Set confirmed mode>>path:#code05]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
	188	+|(% style="width:180px" %)[[Set confirmed mode>>||anchor="H"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
185	185	|(% style="width:180px" %)[[Clear Counting>>path:#codeA6]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
186	186	|(% style="width:180px" %)[[Enable/Disable Alarm>>path:#code70]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
187	187	|(% style="width:180px" %)[[Control ADR/DR>>path:#codeA8]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
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189	189
190	190	Example Downlink payload setting in TTN V3:
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192		-[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
	196	+[[image:1654673412319-976.png]]
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194	194
195		-**Type Code 0x01**
	199	+=== (% style="color:#037691" %)**Type Code 0x01**(%%) ===
196	196
197	197	If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
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199	199
200		-**Type Code 0x04**
	204	+=== (% style="color:#037691" %)**Type Code 0x04**(%%) ===
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202	202	If payload = 0x04FF, it will reset the LWL02.
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204	204
205		-**Type Code 0x05**
	209	+=== (% style="color:#037691" %)**Type Code 0x05**(%%) ===
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207	207	0x05 00: Set uplink to LoRaWAN unconfirmed mode
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209	209	0x05 01: Set uplink to LoRaWAN confirmed mode
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211	211
212		-**Type Code 0xA6**
	216	+=== (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
213	213
214	214	Example: 0xA601: Clear Counting
215	215	For LWL02: reset both count number and time.
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217	217
218		-**Type Code 0xA7**
	222	+=== (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
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220	220	0xA7 01 : Equal to AT+DISALARM=1
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222	222	0xA7 00 : Equal to AT+DISALARM=0
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224	224
225		-**Type Code 0xA8**
	229	+=== (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
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227	227	Format: 0xA8 aa bb
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233	233	Example: 0x A8 00 02 : Set ADR=0 and DR=1
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235	235
236		-**Type Code 0xA9**
	240	+=== (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
237	237
238	238	See [[Alarm Base Timeout>>path:#Alarm_Timeout]] for detail.
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242		-1.
	246	+1.
243	243	11. Integrate with Datacake
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245	245	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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307		-1.
	311	+1.
308	308	11. LEDs
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310	310	|**Action**|**LED behavior**