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Last modified by Xiaoling on 2023/07/18 10:12
From version 170.23
edited by Xiaoling
on 2022/06/22 11:09
Change comment: There is no comment for this version
To version 170.29
edited by Xiaoling
on 2022/06/22 11:21
Change comment: There is no comment for this version

Summary

Details

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Content
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18 18  
19 19  == 1.1 What is LHT65N Temperature & Humidity Sensor ==
20 20  
21 +
22 +(((
21 21  The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
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22 22  
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23 23  The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
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24 24  
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25 25  LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
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26 26  
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27 27  LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
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28 28  
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29 29  LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
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30 30  
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31 31  *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
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32 32  
33 33  
34 34  == 1.2 Features ==
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45 45  * Tri-color LED to indicate working status
46 46  * Datalog feature
47 47  
61 +
48 48  == 1.3 Specification ==
49 49  
50 50  
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69 69  * ±2°C accuracy from -55°C to +125°C
70 70  * Operating Range: -55 °C ~~ 125 °C
71 71  
86 +
72 72  = 2. Connect LHT65N to IoT Server =
73 73  
74 74  == 2.1 How does LHT65N work? ==
75 75  
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76 76  LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
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77 77  
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78 78  If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
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79 79  
80 80  
81 81  == 2.2 How to Activate LHT65N? ==
82 82  
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83 83  The LHT65N has two working modes:
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84 84  
85 -* (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
86 -* (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
106 +* (((
107 +(% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
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109 +* (((
110 +(% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
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87 87  
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88 88  The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
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89 89  
90 90  
91 91  [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
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241 241  
242 242  
243 243  
271 +
244 244  === 2.4.1 Decoder in TTN V3 ===
245 245  
246 246  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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273 273  
274 274  
275 275  
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305 +
276 276  === 2.4.3 Built-in Temperature ===
277 277  
278 278  [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
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284 284  * Temperature:  (0xF5C6-65536)/100=-26.18℃
285 285  
286 286  
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318 +
319 +
287 287  === 2.4.4 Built-in Humidity ===
288 288  
289 289  [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
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291 291  * Humidity:    0x025C/10=60.4%
292 292  
293 293  
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328 +
329 +
294 294  === 2.4.5 Ext # ===
295 295  
296 296  Bytes for External Sensor:
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445 445  
446 446  
447 447  
484 +
485 +
448 448  ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
449 449  
450 450  In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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522 522  
523 523  
524 524  
563 +
525 525  === 2.6.2 Unix TimeStamp ===
526 526  
527 527  
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544 544  
545 545  === 2.6.3 Set Device Time ===
546 546  
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547 547  There are two ways to set device's time:
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548 548  
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549 549  **~1. Through LoRaWAN MAC Command (Default settings)**
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550 550  
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551 551  User need to set SYNCMOD=1 to enable sync time via MAC command.
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552 552  
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553 553  Once LHT65N Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to LHT65N. If LHT65N fails to get the time from the server, LHT65N will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
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554 554  
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555 555  (% style="color:red" %)Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn’t support. If server doesn’t support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.
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556 556  
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557 557  
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558 558  **2. Manually Set Time**
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559 559  
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560 560  User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
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561 561  
562 562  
563 563  
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909 909  * RED LED when external sensor is not connected
910 910  * For each success downlink, the PURPLE LED will blink once
911 911  
912 -
913 -
914 -
915 915  == 2.9 installation ==
916 916  
917 917  (% _mstvisible="1" %)
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946 946  * Operating Range: -40 ~~ 125 °C
947 947  * Working voltage 2.35v ~~ 5v
948 948  
949 -
950 -
951 -
952 952  = 4. Configure LHT65N via AT command or LoRaWAN downlink =
953 953  
954 954  Use can configure LHT65N via AT Command or LoRaWAN Downlink.
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992 992  
993 993  * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
994 994  
995 -
996 996  == 4.2 Set External Sensor Mode ==
997 997  
998 998  Feature: Change External Sensor Mode.
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1014 1014  
1015 1015  * 0xA20702003c: Same as AT+SETCNT=60
1016 1016  
1017 -
1018 -
1019 1019  == 4.3 Enable/Disable uplink Temperature probe ID ==
1020 1020  
1021 1021  (((
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1043 1043  * **0xA800**  **~-~->** AT+PID=0
1044 1044  * **0xA801**     **~-~->** AT+PID=1
1045 1045  
1046 -
1047 -
1048 1048  == 4.4 Set Password ==
1049 1049  
1050 1050  Feature: Set device password, max 9 digits
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1091 1091  
1092 1092  * There is no downlink command to set to Sleep mode.
1093 1093  
1094 -
1095 -
1096 -
1097 1097  == 4.7 Set system time ==
1098 1098  
1099 1099  Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
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1190 1190  
1191 1191  * Example: 0xA301 ~/~/Same as AT+CLRDTA
1192 1192  
1193 -
1194 -
1195 -
1196 1196  == 4.13 Auto Send None-ACK messages ==
1197 1197  
1198 1198  (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
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1207 1207  (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 171px;" %)(% _msthash="1231737" _msttexthash="251862" _mstvisible="6" %)**Command Example**|=(% _mstvisible="4" style="width: 219px;" %)(% _msthash="1231738" _msttexthash="116025" _mstvisible="6" %)**Function**|=(% _mstvisible="4" style="width: 119px;" %)(% _msthash="1231739" _msttexthash="116831" _mstvisible="6" %)**Response**
1208 1208  (% _mstvisible="3" %)|(% _msthash="1231321" _msttexthash="130455" _mstvisible="4" style="width:171px" %)AT+PNACKMD=1|(% _msthash="1231322" _msttexthash="377026" _mstvisible="4" style="width:219px" %)Poll None-ACK message|(% _msthash="1231323" _msttexthash="14989" _mstvisible="4" style="width:119px" %)OK
1209 1209  
1210 -
1211 1211  (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1212 1212  
1213 1213  * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1214 1214  
1215 -
1216 -
1217 1217  = 5. Battery & How to replace =
1218 1218  
1219 1219  == 5.1 Battery Type ==
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1619 1619  
1620 1620  * (% style="color:red" %)**E3**(%%): External Temperature Probe
1621 1621  
1622 -
1623 -
1624 -
1625 1625  = 8. Packing Info =
1626 1626  
1627 1627  
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1630 1630  * LHT65N Temperature & Humidity Sensor x 1
1631 1631  * Optional external sensor
1632 1632  
1633 -
1634 1634  **Dimension and weight**:
1635 1635  
1636 1636  * Device Size:  10 x 10 x 3.5 cm
1637 1637  * Device Weight: 120.5g
1638 1638  
1639 -
1640 -
1641 1641  = 9. Reference material =
1642 1642  
1643 1643  * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1644 1644  
1645 -
1646 1646  = 10. FCC Warning =
1647 1647  
1648 1648  This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions: