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Last modified by Xiaoling on 2023/07/18 10:12
From version 189.3
edited by Xiaoling
on 2022/07/22 10:33
Change comment: There is no comment for this version
To version 185.1
edited by Bei Jinggeng
on 2022/06/28 15:12
Change comment: There is no comment for this version

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Author
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1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
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58 58  * Tri-color LED to indicate working status
59 59  * Datalog feature
60 60  
61 +
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  
86 +
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.)
265 265  
266 -
267 -
268 -
269 269  === 2.4.1 Decoder in TTN V3 ===
270 270  
271 271  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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296 296  * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
297 297  * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
298 298  
299 -
300 -
301 -
302 302  === 2.4.3 Built-in Temperature ===
303 303  
304 304  [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
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309 309  
310 310  * Temperature:  (0xF5C6-65536)/100=-26.18℃
311 311  
312 -
313 -
314 -
315 315  === 2.4.4 Built-in Humidity ===
316 316  
317 317  [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
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318 318  
319 319  * Humidity:    0x025C/10=60.4%
320 320  
321 -
322 -
323 -
324 324  === 2.4.5 Ext # ===
325 325  
326 326  Bytes for External Sensor:
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467 467  
468 468  * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
469 469  
470 -(% border="1" cellspacing="8" style="background-color:#ffffcc; color:green; width:520px" %)
471 -|(% style="width:60px" %)**Bits**|(% style="width:90px" %)**7**|(% style="width:100px" %)**6**|(% style="width:90px" %)**5**|(% style="width:100px" %)**4**|(% style="width:60px" %)**[3:0]**
472 -|(% style="width:96px" %)**Status&Ext**|(% style="width:124px" %)None-ACK Flag|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
460 +[[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
473 473  
474 -* (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
475 -* (% style="color:blue" %)**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.
476 -* (% style="color:blue" %)**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)
462 +* Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
463 +* 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.
464 +* 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)
477 477  
478 -
479 -
480 480  ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
481 481  
482 482  In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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523 523  [[image:image-20220628151143-7.png]]
524 524  
525 525  
526 -
527 527  == 2.5 Show data on Datacake ==
528 528  
529 529  (((
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583 583  
584 584  There are two methods:
585 585  
586 -1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specifying time range.
587 -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 the network recovery.
571 +1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
572 +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.
588 588  
589 -Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
590 -
591 -[[image:image-20220703111700-2.png||height="381" width="1119"]]
592 -
593 -
594 594  === 2.6.2 Unix TimeStamp ===
595 595  
596 596  
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1031 1031  )))
1032 1032  )))
1033 1033  
1034 -(% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1035 1035  
1036 -Total bytes: 8 bytes
1037 1037  
1038 -**Example:**AA0100010001003C
1039 -
1040 -WMOD=01
1041 -
1042 -CITEMP=0001
1043 -
1044 -TEMPlow=0001
1045 -
1046 -TEMPhigh=003C
1047 -
1048 -
1049 1049  == 2.8 LED Indicator ==
1050 1050  
1051 1051  The LHT65 has a triple color LED which for easy showing different stage .
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1771 1771  [[image:image-20220615154519-3.png||height="672" width="807"]]
1772 1772  
1773 1773  
1774 -== 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1741 +== 6.6 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1775 1775  
1776 1776  [[image:image-20220623110706-1.png]]
1777 1777  
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