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123	123	[[image:image-20220522233118-7.png]]
124	124
125	125
126		-=== Step2 Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
	126	+=== Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
127	127
128	128	Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
129	129
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130	130	[[image:image-20220522233300-8.png]]
131	131
132	132
	133	+== Uplink Payload: ==
	134	+
	135	+The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
	136	+
	137	+After each uplink, the (% class="mark" %)BLUE LED(%%) will blink once.
	138	+
	139	+
	140	+(% style="width:572px" %)
	141	+|(% style="width:106px" %)**Size(bytes)**|(% style="width:71px" %)**2**|(% style="width:128px" %)**2**|(% style="width:103px" %)**2**|(% style="width:72px" %)**1**|(% style="width:89px" %)**4**
	142	+|(% style="width:106px" %)**Value**|(% style="width:71px" %)[[BAT>>path:#Battery]]|(% style="width:128px" %)(((
	143	+[[Built-In>>path:#SHT20_Temperature]]
	144	+
	145	+[[Temperature>>path:#SHT20_Temperature]]
	146	+)))|(% style="width:103px" %)(((
	147	+[[Built-in>>path:#SHT20_Humidity]]
	148	+
	149	+[[Humidity>>path:#SHT20_Humidity]]
	150	+)))|(% style="width:72px" %)[[Ext>>path:#Extension_Sensor]] #|(% style="width:89px" %)[[Ext value>>path:#Extension_sensor_value]]
	151	+
	152	+* The First 6 bytes: has fix meanings for every LHT65N.
	153	+* The 7th byte (EXT #): defines the external sensor model.
	154	+* The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won’t be these four bytes.)
	155	+
	156	+
	157	+=== Decoder in TTN V3 ===
	158	+
	159	+When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
	160	+
	161	+Below is the position to put the decoder and LHT65N decoder can be download from here:
	162	+
	163	+
	164	+[[image:image-20220522234118-10.png]]
	165	+
	166	+
133	133	== LED Indicator ==
134	134
135	135	The LHT65N has a triple color LED which for easy shows different stage.

image-20220522234118-10.png

Author

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	1	+XWiki.Edwin

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	1	+66.7 KB

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