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Last modified by Xiaoling on 2023/07/18 10:12
From version 185.3
edited by Xiaoling
on 2022/06/29 13:58
Change comment: There is no comment for this version
To version 187.1
edited by Edwin Chen
on 2022/07/03 11:17
Change comment: Uploaded new attachment "image-20220703111700-2.png", version {1}

Summary

Details

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Author
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1 -XWiki.Xiaoling
1 +XWiki.Edwin
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58 58  * Tri-color LED to indicate working status
59 59  * Datalog feature
60 60  
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61 61  == 1.3 Specification ==
62 62  
63 63  
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82 82  * ±2°C accuracy from -55°C to +125°C
83 83  * Operating Range: -55 °C ~~ 125 °C
84 84  
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85 85  = 2. Connect LHT65N to IoT Server =
86 86  
87 87  == 2.1 How does LHT65N work? ==
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263 263  * The 7th byte (EXT #): defines the external sensor model.
264 264  * The 8(% _msthash="734578" _msttexthash="21372" _mstvisible="4" %)^^th^^(%%) ~~ 11(% _msthash="734579" _msttexthash="21372" _mstvisible="4" %)^^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.)
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266 266  === 2.4.1 Decoder in TTN V3 ===
267 267  
268 268  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.
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293 293  * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
294 294  * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
295 295  
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296 296  === 2.4.3 Built-in Temperature ===
297 297  
298 298  [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
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303 303  
304 304  * Temperature:  (0xF5C6-65536)/100=-26.18℃
305 305  
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306 306  === 2.4.4 Built-in Humidity ===
307 307  
308 308  [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
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309 309  
310 310  * Humidity:    0x025C/10=60.4%
311 311  
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312 312  === 2.4.5 Ext # ===
313 313  
314 314  Bytes for External Sensor:
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461 461  * 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.
462 462  * 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)
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464 464  ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
465 465  
466 466  In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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507 507  [[image:image-20220628151143-7.png]]
508 508  
509 509  
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510 510  == 2.5 Show data on Datacake ==
511 511  
512 512  (((
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569 569  1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
570 570  1. Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will store the sensor data, and it will send all messages after network recover.
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572 572  === 2.6.2 Unix TimeStamp ===
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1024 1024  * RED LED when external sensor is not connected
1025 1025  * For each success downlink, the PURPLE LED will blink once
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1027 1027  == 2.9 installation ==
1028 1028  
1029 1029  (% _mstvisible="1" %)
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1074 1074  * Operating Range: -40 ~~ 125 °C
1075 1075  * Working voltage 2.35v ~~ 5v
1076 1076  
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1077 1077  = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1078 1078  
1079 1079  (((
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1139 1139  
1140 1140  * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1142 1142  == 4.2 Set External Sensor Mode ==
1143 1143  
1144 1144  Feature: Change External Sensor Mode.
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1160 1160  
1161 1161  * 0xA20702003c: Same as AT+SETCNT=60
1162 1162  
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1163 1163  == 4.3 Enable/Disable uplink Temperature probe ID ==
1164 1164  
1165 1165  (((
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1187 1187  * **0xA800**  **~-~->** AT+PID=0
1188 1188  * **0xA801**     **~-~->** AT+PID=1
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1190 1190  == 4.4 Set Password ==
1191 1191  
1192 1192  Feature: Set device password, max 9 digits
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1233 1233  
1234 1234  * There is no downlink command to set to Sleep mode.
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1236 1236  == 4.7 Set system time ==
1237 1237  
1238 1238  Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
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1329 1329  
1330 1330  * Example: 0xA301 ~/~/Same as AT+CLRDTA
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1332 1332  == 4.13 Auto Send None-ACK messages ==
1333 1333  
1334 1334  (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
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1347 1347  
1348 1348  * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1349 1349  
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1350 1350  = 5. Battery & How to replace =
1351 1351  
1352 1352  == 5.1 Battery Type ==
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