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Last modified by Xiaoling on 2023/07/18 10:12
From version 183.1
edited by Bei Jinggeng
on 2022/06/28 15:10
Change comment: Uploaded new attachment "image-20220628151056-6.png", version {1}
To version 185.2
edited by Xiaoling
on 2022/06/29 13:55
Change comment: There is no comment for this version

Summary

Details

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Author
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1 -XWiki.Bei
1 +XWiki.Xiaoling
Content
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58 58  * Tri-color LED to indicate working status
59 59  * Datalog feature
60 60  
61 -
62 -
63 63  == 1.3 Specification ==
64 64  
65 65  
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84 84  * ±2°C accuracy from -55°C to +125°C
85 85  * Operating Range: -55 °C ~~ 125 °C
86 86  
87 -
88 -
89 89  = 2. Connect LHT65N to IoT Server =
90 90  
91 91  == 2.1 How does LHT65N work? ==
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267 267  * The 7th byte (EXT #): defines the external sensor model.
268 268  * 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.)
269 269  
270 -
271 271  === 2.4.1 Decoder in TTN V3 ===
272 272  
273 273  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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298 298  * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
299 299  * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
300 300  
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 -
313 313  === 2.4.4 Built-in Humidity ===
314 314  
315 315  [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
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316 316  
317 317  * Humidity:    0x025C/10=60.4%
318 318  
319 -
320 320  === 2.4.5 Ext # ===
321 321  
322 322  Bytes for External Sensor:
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469 469  * 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.
470 470  * 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)
471 471  
472 -
473 473  ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
474 474  
475 475  In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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480 480  
481 481  AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
482 482  
474 +For example:
483 483  
476 +AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
484 484  
478 +
479 +Or use **downlink command A2** to set the same.
480 +
481 +The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
482 +
483 +When the measured output voltage of the sensor is not within the range of 0.1V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
484 +
485 +[[image:image-20220628150112-1.png||height="241" width="285"]]
486 +
487 +
488 +When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
489 +
490 +[[image:image-20220628150714-4.png]]
491 +
492 +
493 +When the voltage collected by ADC_IN1 is less than the minimum range, the minimum range will be used as the output; Similarly, when the collected voltage is greater than the maximum range, the maximum range will be used as the output.
494 +
495 +1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
496 +
497 +[[image:image-20220628151005-5.png]]
498 +
499 +
500 +2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
501 +
502 +[[image:image-20220628151056-6.png]]
503 +
504 +
505 +3) Within range
506 +
507 +[[image:image-20220628151143-7.png]]
508 +
509 +
485 485  == 2.5 Show data on Datacake ==
486 486  
487 487  (((
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544 544  1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
545 545  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.
546 546  
547 -
548 548  === 2.6.2 Unix TimeStamp ===
549 549  
550 550  
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1000 1000  * RED LED when external sensor is not connected
1001 1001  * For each success downlink, the PURPLE LED will blink once
1002 1002  
1003 -
1004 1004  == 2.9 installation ==
1005 1005  
1006 1006  (% _mstvisible="1" %)
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1051 1051  * Operating Range: -40 ~~ 125 °C
1052 1052  * Working voltage 2.35v ~~ 5v
1053 1053  
1054 -
1055 1055  = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1056 1056  
1057 1057  (((
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1117 1117  
1118 1118  * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1119 1119  
1120 -
1121 1121  == 4.2 Set External Sensor Mode ==
1122 1122  
1123 1123  Feature: Change External Sensor Mode.
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1139 1139  
1140 1140  * 0xA20702003c: Same as AT+SETCNT=60
1141 1141  
1142 -
1143 1143  == 4.3 Enable/Disable uplink Temperature probe ID ==
1144 1144  
1145 1145  (((
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1167 1167  * **0xA800**  **~-~->** AT+PID=0
1168 1168  * **0xA801**     **~-~->** AT+PID=1
1169 1169  
1170 -
1171 1171  == 4.4 Set Password ==
1172 1172  
1173 1173  Feature: Set device password, max 9 digits
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1214 1214  
1215 1215  * There is no downlink command to set to Sleep mode.
1216 1216  
1217 -
1218 1218  == 4.7 Set system time ==
1219 1219  
1220 1220  Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
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1311 1311  
1312 1312  * Example: 0xA301 ~/~/Same as AT+CLRDTA
1313 1313  
1314 -
1315 1315  == 4.13 Auto Send None-ACK messages ==
1316 1316  
1317 1317  (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
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1330 1330  
1331 1331  * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1332 1332  
1333 -
1334 1334  = 5. Battery & How to replace =
1335 1335  
1336 1336  == 5.1 Battery Type ==
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1720 1720  [[image:image-20220615154519-3.png||height="672" width="807"]]
1721 1721  
1722 1722  
1723 -== 6.6 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1739 +== 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1724 1724  
1725 1725  [[image:image-20220623110706-1.png]]
1726 1726  
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1784 1784  * (% style="color:red" %)**E3**(%%): External Temperature Probe
1785 1785  
1786 1786  
1803 +
1804 +
1805 +
1787 1787  = 8. Packing Info =
1788 1788  
1789 1789  
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1798 1798  * Device Weight: 120.5g
1799 1799  
1800 1800  
1820 +
1821 +
1822 +
1801 1801  = 9. Reference material =
1802 1802  
1803 1803  * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1804 1804  
1805 1805  
1828 +
1829 +
1830 +
1806 1806  = 10. FCC Warning =
1807 1807  
1808 1808  This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
image-20220628151143-7.png
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