Last modified by Mengting Qiu on 2024/04/30 14:27
<
From version < 40.1 >
edited by Edwin Chen
on 2022/05/22 23:56
To version < 42.1 >
edited by Edwin Chen
on 2022/05/23 00:04
>
Change comment: There is no comment for this version

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... ... @@ -132,7 +132,7 @@
132 132  
133 133  == Uplink Payload: ==
134 134  
135 -The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
135 +The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
136 136  
137 137  After each uplink, the (% class="mark" %)BLUE LED(%%) will blink once.
138 138  
... ... @@ -153,7 +153,6 @@
153 153  * The 7th byte (EXT #): defines the external sensor model.
154 154  * 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.)
155 155  
156 -
157 157  === Decoder in TTN V3 ===
158 158  
159 159  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.
... ... @@ -160,10 +160,148 @@
160 160  
161 161  Below is the position to put the decoder and LHT65N decoder can be download from here:
162 162  
162 +[[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
163 163  
164 164  [[image:image-20220522234118-10.png]]
165 165  
166 166  
167 +=== BAT-Battery Info ===
168 +
169 +These two bytes of BAT include the battery state and the actually voltage
170 +
171 +(% style="width:646px" %)
172 +|Bit(bit)|(% style="width:272px" %)[15:14]|(% style="width:214px" %)[13:0]
173 +|Value|(% style="width:272px" %)(((
174 +BAT Status
175 +
176 +00(b): Ultra Low ( BAT <= 2.50v)
177 +
178 +01(b): Low  (2.50v <=BAT <= 2.55v)
179 +
180 +10(b): OK   (2.55v <= BAT <=2.65v)
181 +
182 +11(b): Good   (BAT >= 2.65v)
183 +)))|(% style="width:214px" %)Actually BAT voltage
184 +
185 +[[image:image-20220522235639-1.png]]
186 +
187 +Check the battery voltage for LHT65N.
188 +
189 +* BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
190 +* Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
191 +
192 +=== Built-in Temperature ===
193 +
194 +[[image:image-20220522235639-2.png]]
195 +
196 +* Temperature:  0x0ABB/100=27.47℃
197 +
198 +
199 +[[image:image-20220522235639-3.png]]
200 +
201 +* Temperature:  (0xF5C6-65536)/100=-26.18℃
202 +
203 +
204 +=== Built-in Humidity ===
205 +
206 +[[image:image-20220522235639-4.png]]
207 +
208 +* Humidity:    0x025C/10=60.4%
209 +
210 +
211 +=== Ext # ===
212 +
213 +Bytes for External Sensor:
214 +
215 +(% style="width:624px" %)
216 +|(% style="width:139px" %)**EXT # Value**|(% style="width:484px" %)**External Sensor Type**
217 +|(% style="width:139px" %)0x01|(% style="width:484px" %)Sensor E3, Temperature Sensor
218 +|(% style="width:139px" %)0x09|(% style="width:484px" %)Sensor E3, Temperature Sensor, Datalog Mod
219 +
220 +
221 +=== Ext value ===
222 +
223 +==== Ext~=1, E3 Temperature Sensor ====
224 +
225 +[[image:image-20220522235639-5.png]]
226 +
227 +
228 +* DS18B20 temp=0x0ADD/100=27.81℃
229 +
230 +The last 2 bytes of data are meaningless
231 +
232 +
233 +
234 +[[image:image-20220522235639-6.png]]
235 +
236 +* External temperature= (0xF54F-65536)/100=-27.37℃
237 +
238 +The last 2 bytes of data are meaningless
239 +
240 +
241 +If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
242 +
243 +
244 +==== Ext~=9, E3 sensor with Unix Time stamp ====
245 +
246 +Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
247 +
248 +
249 +(% style="width:697px" %)
250 +|(% style="width:96px" %)**Size(bytes)**|(% style="width:164px" %)**2**|(% style="width:104px" %)**2**|(% style="width:106px" %)**2**|(% style="width:108px" %)**1**|(% style="width:116px" %)**4**
251 +|(% style="width:96px" %)**Value**|(% style="width:164px" %)[[External temperature>>path:#DS18b20_value]]|(% style="width:104px" %)(((
252 +[[Built-In>>path:#SHT20_Temperature]]
253 +
254 +[[Temperature>>path:#SHT20_Temperature]]
255 +)))|(% style="width:106px" %)(((
256 +[[BAT Status &>>path:#BAT_Humidity]]
257 +
258 +[[Built-in>>path:#BAT_Humidity]]
259 +
260 +[[Humidity>>path:#BAT_Humidity]]
261 +)))|(% style="width:108px" %)[[Status & Ext>>path:#Status_EXT]]|(% style="width:116px" %)(((
262 +[[Unix>>path:#Unix_Time_Stamp]]
263 +
264 +[[Time Stamp>>path:#Unix_Time_Stamp]]
265 +)))
266 +
267 +* **Battery status & **[[**Built-in Humidity**>>path:#SHT20_Humidity]]
268 +
269 +(% style="width:587px" %)
270 +|Bit(bit)|(% style="width:280px" %)[15:14]|(% style="width:136px" %)[11:0]
271 +|Value|(% style="width:280px" %)(((
272 +BAT Status
273 +
274 +00(b): Ultra Low ( BAT <= 2.50v)
275 +
276 +01(b): Low  (2.50v <=BAT <= 2.55v)
277 +
278 +10(b): OK   (2.55v <= BAT <=2.65v)
279 +
280 +11(b): Good   (BAT >= 2.65v)
281 +)))|(% style="width:136px" %)(((
282 +[[Built-in Humidity>>path:#SHT20_Humidity]]
283 +
284 +
285 +)))
286 +
287 +
288 +* **Status & Ext Byte**
289 +
290 +(% style="width:732px" %)
291 +|(% style="width:128px" %)**Bits**|(% style="width:102px" %)**7**|(% style="width:145px" %)**6**|(% style="width:117px" %)**5**|(% style="width:147px" %)**4**|(% style="width:90px" %)**[3:0]**
292 +|(% style="width:128px" %)**Status & Ext**|(% style="width:102px" %)Not Defined|(% style="width:145px" %)Poll Message Flag|(% style="width:117px" %)Sync time OK|(% style="width:147px" %)Unix Time Request|(% style="width:90px" %)(((
293 +Ext:
294 +
295 +0b(1001)
296 +)))
297 +
298 +* Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
299 +* Sync time OK: 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N will set this bit to 0 until got the time stamp from the application server.
300 +* Unix Time Request:1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N will set this bit to 1 every 10 days to request a time SYNC. (AT+SYNCMOD to set this)
301 +
302 +
303 +
167 167  == LED Indicator ==
168 168  
169 169  The LHT65N has a triple color LED which for easy shows different stage.
image-20220522235639-6.png
Author
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1 +XWiki.Edwin
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1 +3.7 KB
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