Wiki source code of LHT65N LoRaWAN Temperature & Humidity Sensor Manual

Version 103.2 by Xiaoling on 2022/05/25 11:56

version	line-number	content
55.2	1	(% style="text-align:center" %)
78.1	2	[[image:image-20220523115324-1.jpeg\|\|height="317" width="317"]]
55.2	3
2.1	4
56.2	5	LHT65N LoRaWAN Temperature & Humidity Sensor Manual
	6
	7
	8
77.2	9
56.2	10	Table of Contents：
	11
55.2	12	{{toc/}}
2.1	13
55.4	14
	15
77.3	16
78.1	17	= 1. Introduction =
52.2	18
55.2	19	== 1.1 What is LHT65N Temperature & Humidity Sensor ==
52.2	20
56.3	21	(((
56.2	22	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(%%).
56.3	23	)))
2.1	24
56.3	25	(((
2.1	26	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.
56.3	27	)))
2.1	28
56.3	29	(((
6.1	30	LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
56.3	31	)))
2.1	32
56.3	33	(((
2.1	34	LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
56.3	35	)))
2.1	36
56.3	37	(((
56.2	38	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.
56.3	39	)))
2.1	40
56.3	41	(((
6.1	42	*The actual battery life depends on how often to send data, please see the battery analyzer chapter.
56.3	43	)))
2.1	44
55.2	45	== 1.2 Features ==
2.1	46
	47	* Wall mountable
	48	* LoRaWAN v1.0.3 Class A protocol
	49	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
	50	* AT Commands to change parameters
	51	* Remote configure parameters via LoRaWAN Downlink
15.1	52	* Firmware upgradeable via program port
6.1	53	* Built-in 2400mAh battery for up to 10 years of use.
2.1	54	* Built-in Temperature & Humidity sensor
	55	* Optional External Sensors
6.1	56	* Tri-color LED to indicate working status
2.1	57	* Datalog feature
	58
55.2	59	== 1.3 Specification ==
2.1	60
56.3	61	(((
2.1	62	Built-in Temperature Sensor:
56.3	63	)))
2.1	64
56.3	65	* (((
	66	Resolution: 0.01 °C
	67	)))
	68	* (((
	69	Accuracy Tolerance : Typ ±0.3 °C
	70	)))
	71	* (((
	72	Long Term Drift: < 0.02 °C/yr
	73	)))
	74	* (((
	75	Operating Range: -40 ~~ 85 °C
	76	)))
2.1	77
56.3	78	(((
2.1	79	Built-in Humidity Sensor:
56.3	80	)))
2.1	81
56.3	82	* (((
	83	Resolution: 0.04 %RH
	84	)))
	85	* (((
	86	Accuracy Tolerance : Typ ±3 %RH
	87	)))
	88	* (((
	89	Long Term Drift: < 0.02 °C/yr
	90	)))
	91	* (((
	92	Operating Range: 0 ~~ 96 %RH
	93	)))
2.1	94
56.3	95	(((
6.1	96	External Temperature Sensor:
56.3	97	)))
2.1	98
56.3	99	* (((
	100	Resolution: 0.0625 °C
	101	)))
	102	* (((
	103	±0.5°C accuracy from -10°C to +85°C
	104	)))
	105	* (((
	106	±2°C accuracy from -55°C to +125°C
	107	)))
	108	* (((
	109	Operating Range: -55 °C ~~ 125 °C
	110	)))
2.1	111
55.2	112	= 2. Connect LHT65N to IoT Server =
18.1	113
55.2	114	== 2.1 How does LHT65N work? ==
18.1	115
56.4	116	(((
18.1	117	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.
56.4	118	)))
18.1	119
56.4	120	(((
18.1	121	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.
56.4	122	)))
18.1	123
55.2	124	== 2.2 How to Activate LHT65N? ==
18.1	125
	126	The LHT65N has two working modes:
	127
	128	* Deep Sleep Mode: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
19.1	129	* 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, LHT65 will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode.
18.1	130
56.5	131	(((
18.1	132	The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
56.5	133	)))
18.1	134
	135	[[image:image-20220515123819-1.png\|\|height="379" width="317"]]
	136
99.2	137	[[image:image-20220525110604-2.png]]
18.1	138
55.2	139	== 2.3 Example to join LoRaWAN network ==
32.1	140
	141	(% class="wikigeneratedid" %)
	142	This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
	143
	144	(% class="wikigeneratedid" %)
	145	[[image:image-20220522232442-1.png\|\|height="387" width="648"]]
	146
	147	Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
	148
	149
55.3	150	=== 2.3.1 Step 1: Create Device n TTN ===
32.1	151
	152	Create a device in TTN V3 with the OTAA keys from LHT65N.
	153
	154	Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
	155
	156	[[image:image-20220522232812-2.png\|\|height="219" width="279"]]
	157
	158	User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
	159
	160	Add APP EUI in the application.
	161
	162	[[image:image-20220522232916-3.png]]
	163
	164	[[image:image-20220522232932-4.png]]
	165
	166	[[image:image-20220522232954-5.png]]
	167
	168	Note: LHT65N use same payload as LHT65.
	169
	170	[[image:image-20220522233026-6.png]]
	171
	172
	173	Input APP EUI, APP KEY and DEV EUI:
	174
	175	[[image:image-20220522233118-7.png]]
	176
	177
55.2	178	=== 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
32.1	179
	180	Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
	181
57.3	182	[[image:image-20220522233300-8.png\|\|height="219" width="722"]]
32.1	183
	184
55.3	185	== 2.4 Uplink Payload ==
35.1	186
57.2	187	The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)every 20 minutes(%%) send one uplink by default.
35.1	188
57.2	189	After each uplink, the (% style="color:blue" %)BLUE LED(%%) will blink once.
35.1	190
76.2	191	(% border="1" style="background-color:#ffffcc; color:green; width:426px" %)
	192	\|(% style="width:97px" %)(((
57.10	193	Size(bytes)
76.2	194	)))\|(% style="width:39px" %)(((
57.10	195	2
76.2	196	)))\|(% style="width:100px" %)(((
57.10	197	2
76.2	198	)))\|(% style="width:77px" %)(((
57.10	199	2
76.2	200	)))\|(% style="width:47px" %)(((
	201	1
57.10	202	)))\|(% style="width:51px" %)(((
	203	4
	204	)))
76.2	205	\|(% style="width:97px" %)(((
57.10	206	Value
76.2	207	)))\|(% style="width:39px" %)(((
96.1	208	[[BAT>>\|\|anchor="H2.4.2BAT-BatteryInfo"]]
76.2	209	)))\|(% style="width:100px" %)(((
57.10	210	(((
95.1	211	[[Built-In Temperature>>\|\|anchor="H2.4.3Built-inTemperature"]]
57.10	212	)))
76.2	213	)))\|(% style="width:77px" %)(((
57.10	214	(((
99.3	215	[[Built-in>>\|\|anchor="H2.4.4Built-inHumidity"]]
57.10	216	)))
101.1	217
57.10	218	(((
99.4	219	[[Humidity>>\|\|anchor="H2.4.4Built-inHumidity"]]
57.10	220	)))
76.2	221	)))\|(% style="width:47px" %)(((
99.4	222	[[Ext>>\|\|anchor="H2.4.5Ext23"]] #
57.10	223	)))\|(% style="width:51px" %)(((
99.4	224	[[Ext value>>\|\|anchor="H2.4.6Extvalue"]]
57.10	225	)))
57.8	226
35.1	227	* The First 6 bytes: has fix meanings for every LHT65N.
	228	* The 7th byte (EXT #): defines the external sensor model.
	229	* 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.)
	230
55.4	231	=== 2.4.1 Decoder in TTN V3 ===
35.1	232
	233	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.
	234
	235	Below is the position to put the decoder and LHT65N decoder can be download from here:
	236
42.1	237	[[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
35.1	238
57.4	239	[[image:image-20220522234118-10.png\|\|height="353" width="729"]]
35.1	240
55.4	241	=== 2.4.2 BAT-Battery Info ===
42.1	242
	243	These two bytes of BAT include the battery state and the actually voltage
	244
76.2	245	[[image:image-20220523152839-18.png]]
42.1	246
57.5	247	[[image:image-20220522235639-1.png\|\|height="139" width="727"]]
42.1	248
	249	Check the battery voltage for LHT65N.
	250
	251	* BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
	252	* Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
	253
55.4	254	=== 2.4.3 Built-in Temperature ===
42.1	255
57.5	256	[[image:image-20220522235639-2.png\|\|height="138" width="722"]]
42.1	257
	258	* Temperature: 0x0ABB/100=27.47℃
	259
	260	[[image:image-20220522235639-3.png]]
	261
	262	* Temperature: (0xF5C6-65536)/100=-26.18℃
	263
55.4	264	=== 2.4.4 Built-in Humidity ===
42.1	265
57.5	266	[[image:image-20220522235639-4.png\|\|height="138" width="722"]]
42.1	267
	268	* Humidity: 0x025C/10=60.4%
	269
55.4	270	=== 2.4.5 Ext # ===
42.1	271
	272	Bytes for External Sensor:
	273
76.2	274	[[image:image-20220523152822-17.png]]
42.1	275
55.4	276	=== 2.4.6 Ext value ===
42.1	277
55.4	278	==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
42.1	279
	280	[[image:image-20220522235639-5.png]]
	281
	282	* DS18B20 temp=0x0ADD/100=27.81℃
	283
	284	The last 2 bytes of data are meaningless
	285
	286	[[image:image-20220522235639-6.png]]
	287
	288	* External temperature= (0xF54F-65536)/100=-27.37℃
	289
57.5	290	(((
42.1	291	The last 2 bytes of data are meaningless
57.5	292	)))
42.1	293
57.5	294	(((
42.1	295	If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
57.5	296	)))
42.1	297
	298
55.4	299	==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
42.1	300
	301	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:
	302
76.11	303	(% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
73.2	304	\|(% style="width:96px" %)(((
76.3	305	Size(bytes)
	306	)))\|(% style="width:71px" %)(((
	307	2
	308	)))\|(% style="width:99px" %)(((
	309	2
	310	)))\|(% style="width:132px" %)(((
	311	2
	312	)))\|(% style="width:54px" %)(((
	313	1
	314	)))\|(% style="width:64px" %)(((
	315	4
	316	)))
	317	\|(% style="width:96px" %)(((
73.2	318	Value
	319	)))\|(% style="width:71px" %)(((
99.4	320	[[External temperature>>\|\|anchor="H4.2SetExternalSensorMode"]]
73.2	321	)))\|(% style="width:99px" %)(((
	322	(((
99.4	323	[[Built-In>>\|\|anchor="H2.4.3Built-inTemperature"]]
73.2	324	)))
42.1	325
73.2	326	(((
99.4	327	[[Temperature>>\|\|anchor="H2.4.3Built-inTemperature"]]
73.2	328	)))
	329	)))\|(% style="width:132px" %)(((
	330	(((
57.5	331	BAT Status &
73.2	332	)))
42.1	333
73.2	334	(((
99.4	335	[[Built-in Humidity>>\|\|anchor="H2.4.4Built-inHumidity"]]
73.2	336	)))
	337	)))\|(% style="width:54px" %)(((
	338	Status & Ext
	339	)))\|(% style="width:64px" %)(((
	340	(((
100.5	341	[[Unix Time Stamp>>\|\|anchor="H2.6.2UnixTimeStamp"]]
42.1	342	)))
73.2	343	)))
42.1	344
57.6	345	* Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)
42.1	346
57.11	347	(% border="1" style="background-color:#ffffcc; color:green; width:469px" %)
	348	\|(% style="width:65px" %)Bit(bit)\|(% style="width:267px" %)[15:14]\|(% style="width:134px" %)[11:0]
	349	\|(% style="width:65px" %)Value\|(% style="width:267px" %)(((
42.1	350	BAT Status
	351
	352	00(b): Ultra Low ( BAT <= 2.50v)
	353
	354	01(b): Low (2.50v <=BAT <= 2.55v)
	355
	356	10(b): OK (2.55v <= BAT <=2.65v)
	357
	358	11(b): Good (BAT >= 2.65v)
57.11	359	)))\|(% style="width:134px" %)(((
99.6	360	[[Built-in Humidity>>\|\|anchor="H2.4.4Built-inHumidity"]]
42.1	361
	362
	363	)))
	364
	365	* Status & Ext Byte
	366
73.2	367	[[image:image-20220523152434-16.png]]
42.1	368
	369	* Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
	370	* 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.
	371	* 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)
	372
55.4	373	== 2.5 Show data on Datacake ==
42.1	374
47.1	375	Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
	376
57.6	377	(((
47.1	378	Step 1: Be sure that your device is programmed and properly connected to the LoRaWAN network.
57.6	379	)))
47.1	380
57.6	381	(((
47.1	382	Step 2: Configure your Application to forward data to Datacake you will need to add integration. Go to TTN V3 Console ~-~-> Applications ~-~-> Integrations ~-~-> Add Integrations.
57.6	383	)))
47.1	384
57.6	385	(((
47.1	386	Add Datacake:
57.6	387	)))
47.1	388
	389	[[image:image-20220523000825-7.png\|\|height="262" width="583"]]
	390
	391
	392	Select default key as Access Key:
	393
	394	[[image:image-20220523000825-8.png\|\|height="453" width="406"]]
	395
	396	In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
	397
	398	[[image:image-20220523000825-9.png\|\|height="366" width="392"]]
	399
57.12	400	[[image:image-20220523000825-10.png\|\|height="413" width="728"]]
47.1	401
55.4	402	== 2.6 Datalog Feature ==
47.1	403
79.1	404	Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LHT65N will store the reading for future retrieving purposes. There are two ways for IoT servers to get datalog from LHT65N.
51.1	405
79.1	406	=== 2.6.1 Ways to get datalog via LoRaWAN ===
51.1	407
80.1	408	There are two methods:
79.1	409
90.1	410	1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>\|\|anchor="H2.6.4Pollsensorvalue"]] for specify time range.
93.1	411	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.
80.1	412
79.1	413	=== 2.6.2 Unix TimeStamp ===
	414
51.1	415	LHT65N uses Unix TimeStamp format based on
	416
	417	[[image:image-20220523001219-11.png\|\|height="97" width="627"]]
	418
	419
57.6	420	(((
51.1	421	User can get this time from link: [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
57.6	422	)))
51.1	423
57.6	424	(((
51.1	425	Below is the converter example
57.6	426	)))
51.1	427
57.11	428	[[image:image-20220523001219-12.png\|\|height="298" width="720"]]
51.1	429
	430	So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
	431
79.1	432	=== 2.6.3 Set Device Time ===
51.1	433
57.11	434	(((
51.1	435	There are two ways to set device’s time:
57.11	436	)))
51.1	437
57.11	438	(((
51.1	439	~1. Through LoRaWAN MAC Command (Default settings)
57.11	440	)))
51.1	441
57.11	442	(((
51.1	443	User need to set SYNCMOD=1 to enable sync time via MAC command.
57.11	444	)))
51.1	445
57.11	446	(((
51.1	447	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).
57.11	448	)))
51.1	449
57.11	450	(((
51.1	451	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.
57.11	452	)))
51.1	453
57.11	454	(((
	455
	456	)))
51.1	457
57.11	458	(((
51.1	459	2. Manually Set Time
57.11	460	)))
51.1	461
57.11	462	(((
51.1	463	User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
57.11	464	)))
51.1	465
83.1	466	=== 2.6.4 Poll sensor value ===
51.1	467
	468	User can poll sensor value based on timestamps from the server. Below is the downlink command.
	469
73.2	470	[[image:image-20220523152302-15.png]]
51.1	471
57.12	472	(((
51.1	473	Timestamp start and Timestamp end use Unix TimeStamp format as mentioned above. Devices will reply with all data log during this time period, use the uplink interval.
57.12	474	)))
51.1	475
57.12	476	(((
77.7	477	For example, downlink command (% style="display:none" %) (%%)31 5FC5F350 5FC6 0160 05
57.12	478	)))
51.1	479
57.12	480	(((
51.1	481	Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
57.12	482	)))
51.1	483
57.12	484	(((
51.1	485	Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
57.12	486	)))
51.1	487
	488
79.1	489	=== 2.6.5 Datalog Uplink payload ===
51.1	490
	491	The Datalog poll reply uplink will use below payload format.
	492
57.13	493	(((
58.2	494	Retrieval data payload
57.13	495	)))
51.1	496
76.11	497	(% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
58.6	498	\|(% style="width:93px" %)(((
76.5	499	(((
58.6	500	Size(bytes)
76.5	501	)))
58.6	502	)))\|(% style="width:71px" %)(((
76.5	503	(((
58.6	504	2
76.5	505	)))
58.6	506	)))\|(% style="width:102px" %)(((
76.5	507	(((
58.6	508	2
76.5	509	)))
58.6	510	)))\|(% style="width:86px" %)(((
76.5	511	(((
58.6	512	2
76.5	513	)))
76.6	514	)))\|(% style="width:86px" %)(((
76.5	515	(((
58.6	516	1
76.5	517	)))
76.6	518	)))\|(% style="width:48px" %)(((
76.5	519	(((
58.6	520	4
	521	)))
76.5	522	)))
58.6	523	\|(% style="width:93px" %)(((
76.5	524	(((
58.6	525	Value
76.5	526	)))
58.6	527	)))\|(% style="width:71px" %)(((
76.5	528	(((
99.6	529	[[External sensor data>>\|\|anchor="H2.4.6Extvalue"]]
76.5	530	)))
58.6	531	)))\|(% style="width:102px" %)(((
	532	(((
76.5	533	(((
99.6	534	[[Built In>>\|\|anchor="H2.4.3Built-inTemperature"]]
58.6	535	)))
76.5	536	)))
58.6	537
	538	(((
76.5	539	(((
100.2	540	[[Temperature>>\|\|anchor="H2.4.3Built-inTemperature"]]
58.6	541	)))
76.5	542	)))
58.6	543	)))\|(% style="width:86px" %)(((
	544	(((
76.5	545	(((
100.2	546	[[Built-in>>\|\|anchor="H2.4.4Built-inHumidity"]]
58.6	547	)))
76.5	548	)))
58.6	549
	550	(((
76.5	551	(((
100.2	552	[[Humidity>>\|\|anchor="H2.4.4Built-inHumidity"]]
58.6	553	)))
76.5	554	)))
76.6	555	)))\|(% style="width:86px" %)(((
76.5	556	(((
101.2	557	Poll message flag & Ext
76.5	558	)))
76.6	559	)))\|(% style="width:48px" %)(((
58.6	560	(((
76.5	561	(((
100.6	562	[[Unix Time Stamp>>\|\|anchor="H2.6.2UnixTimeStamp"]]
58.6	563	)))
76.5	564	)))
51.1	565
58.6	566	(((
76.5	567	(((
51.1	568
	569	)))
58.6	570	)))
76.5	571	)))
51.1	572
58.2	573	Poll message flag & Ext
51.1	574
73.2	575	[[image:image-20220523152208-14.png]]
51.1	576
58.8	577	(((
58.2	578	(((
51.1	579	Poll Message Flag: 1: This message is a poll message reply.
58.2	580	)))
73.2	581	)))
51.1	582
58.2	583	* (((
73.2	584	(((
58.2	585	Poll Message Flag is set to 1.
	586	)))
73.2	587	)))
58.2	588	* (((
73.2	589	(((
58.2	590	Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
	591	)))
73.2	592	)))
51.1	593
58.2	594	(((
73.2	595	(((
51.1	596	For example, in US915 band, the max payload for different DR is:
58.2	597	)))
73.2	598	)))
51.1	599
58.2	600	(((
73.2	601	(((
58.2	602	a) DR0: max is 11 bytes so one entry of data
	603	)))
73.2	604	)))
51.1	605
58.2	606	(((
73.2	607	(((
58.2	608	b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
	609	)))
73.2	610	)))
51.1	611
58.2	612	(((
73.2	613	(((
58.2	614	c) DR2: total payload includes 11 entries of data
	615	)))
73.2	616	)))
51.1	617
58.2	618	(((
73.2	619	(((
58.2	620	d) DR3: total payload includes 22 entries of data.
	621	)))
73.2	622	)))
51.1	623
58.2	624	(((
73.2	625	(((
51.1	626	If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0
58.2	627	)))
73.2	628	)))
51.1	629
	630
	631	Example:
	632
	633	If LHT65N has below data inside Flash:
	634
58.2	635	[[image:image-20220523144455-1.png\|\|height="335" width="735"]]
	636
76.6	637	(((
58.4	638	If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
76.6	639	)))
51.1	640
76.6	641	(((
51.1	642	Where : Start time: 60065F97 = time 21/1/19 04:27:03
76.6	643	)))
51.1	644
76.6	645	(((
51.1	646	Stop time 60066DA7= time 21/1/19 05:27:03
76.6	647	)))
51.1	648
76.6	649	(((
	650
	651	)))
51.1	652
76.6	653	(((
51.1	654	LHT65N will uplink this payload.
76.6	655	)))
51.1	656
55.4	657	[[image:image-20220523001219-13.png\|\|height="421" width="727"]]
51.1	658
	659	7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
	660
	661	Where the first 11 bytes is for the first entry:
	662
	663	7FFF089801464160065F97
	664
	665	Ext sensor data=0x7FFF/100=327.67
	666
	667	Temp=0x0898/100=22.00
	668
	669	Hum=0x0146/10=32.6
	670
	671	poll message flag & Ext=0x41,means reply data,Ext=1
	672
	673	Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
	674
103.1	675
55.4	676	== 2.7 Alarm Mode ==
51.1	677
103.2	678	Alarm mode feature is added since firmware v1.5. When device is in Alarm mode, it will check the built-in sensor temperature in a short interval. If the temperature exceeds the pre-configure range, it will send an uplink immediately.
51.1	679
76.6	680	(((
58.10	681	(% style="color:red" %)Note: Alarm mode will increase a little big the power consumption, we recommend extending the normal reading time when enabling this feature.
76.6	682	)))
51.1	683
58.10	684	AT Commands for Alarm mode:
51.1	685
58.10	686	(% class="box infomessage" %)
	687	(((
76.6	688	(((
51.1	689	AT+WMOD=1: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
	690	AT+CITEMP=1: The interval to check the temperature for Alarm. (Unit: minute)
58.10	691	)))
76.6	692	)))
51.1	693
103.1	694	(% class="wikigeneratedid" %)
	695	== ==
	696
55.4	697	== 2.8 LED Indicator ==
18.1	698
58.10	699	(((
19.1	700	The LHT65N has a triple color LED which for easy shows different stage.
58.10	701	)))
19.1	702
58.10	703	(((
19.1	704	While pressing ACT button, the LED will work as per LED status with ACT button.
58.10	705	)))
19.1	706
58.10	707	(((
19.1	708	In a normal working state:
58.10	709	)))
19.1	710
58.10	711	* (((
	712	For each uplink, the BLUE LED or RED LED will blink once.
	713	)))
	714	* (((
	715	BLUE LED when an external sensor is connected
	716	)))
	717	* (((
	718	RED LED when an external sensor is not connected
	719	)))
	720	* (((
	721	For each success downlink, the PURPLE LED will blink once
	722	)))
19.1	723
23.1	724	----
19.1	725
55.4	726	== 2.9 Installation ==
21.1	727
52.1	728	[[image:image-20220516231650-1.png\|\|height="436" width="428"]]
21.1	729
55.4	730	= 3. Sensors & Accessories =
21.1	731
55.4	732	== 3.1 E3 Temperature Probe ==
21.1	733
14.1	734	[[image:image-20220515080154-4.png\|\|height="182" width="161"]] [[image:image-20220515080330-5.png\|\|height="201" width="195"]]
	735
	736
	737	With Temperature sensor with 2 meters cable long
	738
	739	* Resolution: 0.0625 °C
	740	* ±0.5°C accuracy from -10°C to +85°C
	741	* ±2°C accuracy from -55°C to +125°C
	742	* Operating Range: -40 ~~ 125 °C
	743	* -55°C to 125°C
	744	* Working voltage 2.35v ~~ 5v
	745
55.4	746	= 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
52.1	747
76.7	748	(((
52.1	749	Use can configure LHT65N via AT Command or LoRaWAN Downlink.
76.7	750	)))
52.1	751
76.7	752	* (((
	753	AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
	754	)))
	755	* (((
	756	LoRaWAN Downlink instruction for different platforms:
	757	)))
52.1	758
76.7	759	(((
52.1	760	[[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server>>url:http://wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server]]
76.7	761	)))
52.1	762
76.7	763	(((
52.1	764	There are two kinds of commands to configure LHT65N, they are:
76.7	765	)))
52.1	766
76.7	767	(((
58.10	768	(% style="color:#4f81bd" %)* General Commands.
76.7	769	)))
52.1	770
76.7	771	(((
52.1	772	These commands are to configure:
76.7	773	)))
52.1	774
76.7	775	* (((
	776	General system settings like: uplink interval.
	777	)))
	778	* (((
	779	LoRaWAN protocol & radio-related commands.
	780	)))
52.1	781
76.7	782	(((
52.1	783	They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~~). These commands can be found on the wiki:
76.7	784	)))
52.1	785
76.7	786	(((
52.1	787	[[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
76.7	788	)))
52.1	789
76.7	790	(((
58.10	791	(% style="color:#4f81bd" %)* Commands special design for LHT65N
76.7	792	)))
52.1	793
76.7	794	(((
52.1	795	These commands are only valid for LHT65N, as below:
76.7	796	)))
52.1	797
55.4	798	== 4.1 Set Transmit Interval Time ==
52.1	799
	800	Feature: Change LoRaWAN End Node Transmit Interval.
	801
	802	AT Command: AT+TDC
	803
66.2	804	[[image:image-20220523150701-2.png]]
52.1	805
76.8	806	(((
52.1	807	Downlink Command: 0x01
76.8	808	)))
52.1	809
76.8	810	(((
52.1	811	Format: Command Code (0x01) followed by 3 bytes time value.
76.8	812	)))
52.1	813
76.8	814	(((
52.1	815	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
76.8	816	)))
52.1	817
76.8	818	* (((
	819	Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	820	)))
	821	* (((
	822	Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	823	)))
52.1	824
55.4	825	== 4.2 Set External Sensor Mode ==
52.1	826
	827	Feature: Change External Sensor Mode.
	828
	829	AT Command: AT+EXT
	830
66.2	831	[[image:image-20220523150759-3.png]]
52.1	832
76.8	833	(((
52.1	834	Downlink Command: 0xA2
76.8	835	)))
52.1	836
76.8	837	(((
52.1	838	Total bytes: 2 ~~ 5 bytes
76.8	839	)))
52.1	840
76.8	841	(((
66.2	842	Example:
76.8	843	)))
52.1	844
76.8	845	* (((
	846	0xA201: Set external sensor type to E1
	847	)))
	848	* (((
	849	0xA209: Same as AT+EXT=9
	850	)))
	851	* (((
	852	0xA20702003c,Same as AT+SETCNT=60
	853	)))
52.1	854
55.4	855	== 4.3 Enable/Disable uplink Temperature probe ID ==
52.1	856
	857	Feature: If PID is enabled, device will send the temperature probe ID on:
	858
	859	* First Packet after OTAA Join
	860	* Every 24 hours since the first packet.
	861
	862	PID is default set to disable (0)
	863
	864	AT Command:
	865
66.2	866	[[image:image-20220523150928-4.png]]
52.1	867
	868	Downlink Command:
	869
66.2	870	* 0xA800 ~-~-> AT+PID=0
	871	* 0xA801 ~-~-> AT+PID=1
52.1	872
55.4	873	== 4.4 Set Password ==
52.1	874
	875	Feature: Set device password, max 9 digits
	876
	877	AT Command: AT+PWORD
	878
66.2	879	[[image:image-20220523151052-5.png]]
52.1	880
76.8	881	(((
52.1	882	Downlink Command:
76.8	883	)))
52.1	884
76.8	885	(((
52.1	886	No downlink command for this feature.
76.8	887	)))
52.1	888
55.4	889	== 4.5 Quit AT Command ==
52.1	890
	891	Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
	892
	893	AT Command: AT+DISAT
	894
66.2	895	[[image:image-20220523151132-6.png]]
52.1	896
	897	Downlink Command:
	898
	899	No downlink command for this feature.
	900
55.4	901	== 4.6 Set to sleep mode ==
52.1	902
	903	Feature: Set device to sleep mode
	904
	905	AT Command: AT+SLEEP
	906
66.2	907	[[image:image-20220523151218-7.png]]
52.1	908
	909	Downlink Command:
	910
	911	* There is no downlink command to set to Sleep mode.
	912
55.4	913	== 4.7 Set system time ==
52.1	914
103.2	915	Feature: Set system time, unix format. [[See here for format detail.>>\|\|anchor="H2.6.2UnixTimeStamp"]]
52.1	916
	917	AT Command:
	918
66.2	919	[[image:image-20220523151253-8.png]]
52.1	920
	921	Downlink Command:
	922
	923	0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
	924
55.4	925	== 4.8 Set Time Sync Mode ==
52.1	926
76.8	927	(((
52.1	928	Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
76.8	929	)))
52.1	930
76.8	931	(((
52.1	932	SYNCMOD is set to 1 by default. If user want to set a different time from LoRaWAN server, user need to set this to 0.
76.8	933	)))
52.1	934
76.8	935	(((
52.1	936	AT Command:
76.8	937	)))
52.1	938
66.2	939	[[image:image-20220523151336-9.png]]
52.1	940
	941	Downlink Command:
	942
	943	0x28 01 ~/~/ Same As AT+SYNCMOD=1
	944
	945	0x28 00 ~/~/ Same As AT+SYNCMOD=0
	946
55.4	947	== 4.9 Set Time Sync Interval ==
52.1	948
	949	Feature: Define System time sync interval. SYNCTDC default value: 10 days.
	950
	951	AT Command:
	952
70.2	953	[[image:image-20220523151411-10.png]]
52.1	954
	955	Downlink Command:
	956
	957	0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
	958
55.4	959	== 4.10 Print data entries base on page. ==
52.1	960
	961	Feature: Print the sector data from start page to stop page (max is 416 pages).
	962
	963	AT Command: AT+PDTA
	964
70.2	965	[[image:image-20220523151450-11.png]]
52.1	966
	967	Downlink Command:
	968
	969	No downlink commands for feature
	970
55.4	971	== 4.11 Print last few data entries. ==
52.1	972
	973	Feature: Print the last few data entries
	974
	975	AT Command: AT+PLDTA
	976
70.2	977	[[image:image-20220523151524-12.png]]
52.1	978
	979	Downlink Command:
	980
	981	No downlink commands for feature
	982
55.4	983	== 4.12 Clear Flash Record ==
52.1	984
	985	Feature: Clear flash storage for data log feature.
	986
	987	AT Command: AT+CLRDTA
	988
70.2	989	[[image:image-20220523151556-13.png]]
52.1	990
	991	Downlink Command: 0xA3
	992
	993	* Example: 0xA301 ~/~/Same as AT+CLRDTA
	994
90.1	995	== 4.13 Auto Send None-ACK messages ==
	996
	997	Feature: LHT65N will wait for ACK for each uplink, If LHT65N doesn't get ACK from the IoT server, it will consider the message doesn't arrive server and store it. LHT65N keeps sending messages in normal periodically. Once LHT65N gets ACK from a server, it will consider the network is ok and start to send the not-arrive message.
	998
	999
	1000	AT Command: AT+PNACKMD
	1001
	1002	The default factory setting is 0
	1003
100.2	1004	(% border="1" style="background-color:#ffffcc; color:green; width:450px" %)
	1005	\|=(% style="width: 171px;" %)Command Example\|=(% style="width: 219px;" %)Function\|=(% style="width: 119px;" %)Response
	1006	\|(% style="width:171px" %)AT+PNACKMD=1\|(% style="width:219px" %)Poll None-ACK message\|(% style="width:119px" %)OK
90.1	1007
	1008	Downlink Command: 0x34
	1009
	1010	* Example: 0x3401 ~/~/Same as AT+PNACKMD=1
	1011
55.4	1012	= 5. Battery & How to replace =
52.1	1013
55.4	1014	== 5.1 Battery Type ==
11.1	1015
	1016	LHT65N is equipped with a 2400mAH Li-MnO2 (CR17505) battery . The battery is an un-rechargeable battery with low discharge rate targeting for up to 8~~10 years use. This type of battery is commonly used in IoT devices for long-term running, such as water meters.
	1017
73.2	1018	(((
11.1	1019	The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
14.1	1020	[[image:image-20220515075034-1.png\|\|height="208" width="644"]]
73.2	1021	)))
11.1	1022
73.2	1023	(((
11.1	1024	The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
	1025
73.2	1026	)))
11.1	1027
55.4	1028	== 5.2 Replace Battery ==
11.1	1029
	1030	LHT65N has two screws on the back, Unscrew them, and changing the battery inside is ok. The battery is a general CR17450 battery. Any brand should be ok.
	1031
	1032	[[image:image-20220515075440-2.png\|\|height="338" width="272"]][[image:image-20220515075625-3.png\|\|height="193" width="257"]]
	1033
55.4	1034	== 5.3 Battery Life Analyze ==
11.1	1035
73.2	1036	(((
11.1	1037	Dragino battery-powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimated battery life:
	1038	https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
73.2	1039	)))
11.1	1040
55.4	1041	= 6. Order Info =
11.1	1042
73.2	1043	(((
76.8	1044	Part Number: (% style="color:#4f81bd" %) LHT65N-XX-YY
73.2	1045	)))
2.1	1046
73.2	1047	(((
	1048	(% style="color:#4f81bd" %)XX (%%): The default frequency band
	1049	)))
2.1	1050
73.2	1051	* (((
	1052	(% style="color:#4f81bd" %) AS923(%%): LoRaWAN AS923 band
	1053	)))
	1054	* (((
	1055	(% style="color:#4f81bd" %) AU915(%%): LoRaWAN AU915 band
	1056	)))
	1057	* (((
	1058	(% style="color:#4f81bd" %) EU433(%%): LoRaWAN EU433 band
	1059	)))
	1060	* (((
	1061	(% style="color:#4f81bd" %) EU868(%%): LoRaWAN EU868 band
	1062	)))
	1063	* (((
	1064	(% style="color:#4f81bd" %) KR920(%%): LoRaWAN KR920 band
	1065	)))
	1066	* (((
	1067	(% style="color:#4f81bd" %) US915(%%): LoRaWAN US915 band
	1068	)))
	1069	* (((
	1070	(% style="color:#4f81bd" %) IN865(%%): LoRaWAN IN865 band
	1071	)))
	1072	* (((
	1073	(% style="color:#4f81bd" %) CN470(%%): LoRaWAN CN470 band
	1074	)))
4.1	1075
73.2	1076	(((
	1077	(% style="color:#4f81bd" %)YY(%%): Sensor Accessories
	1078	)))
14.1	1079
73.2	1080	* (((
	1081	(% style="color:#4f81bd" %)E3(%%): External Temperature Probe
	1082	)))
14.1	1083
55.4	1084	= 7. Packing Info =
4.1	1085
73.2	1086	(((
4.1	1087	Package Includes:
73.2	1088	)))
4.1	1089
73.2	1090	* (((
	1091	LHT65N Temperature & Humidity Sensor x 1
	1092	)))
	1093	* (((
	1094	Program cable x 1
	1095	)))
	1096	* (((
	1097	Optional external sensor
	1098	)))
4.1	1099
73.2	1100	(((
4.1	1101	Dimension and weight:
73.2	1102	)))
4.1	1103
73.2	1104	* (((
	1105	Device Size: 13.5 x 7 x 3 cm
	1106	)))
	1107	* (((
	1108	Device Weight: 105g
	1109	)))
	1110	* (((
	1111	Package Size / pcs : 14.5 x 8 x 5 cm
	1112	)))
	1113	* (((
	1114	Weight / pcs : 170g
	1115	)))
4.1	1116
55.4	1117	= 8. FCC Warning =
7.1	1118
73.2	1119	(((
7.1	1120	This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
73.2	1121	)))
7.1	1122
73.2	1123	(((
55.4	1124	(1) This device may not cause harmful interference；
73.2	1125	)))
7.1	1126
73.2	1127	(((
55.4	1128	(2) this device must accept any interference received, including interference that may cause undesired operation.
73.2	1129	)))

Wiki source code of LHT65N LoRaWAN Temperature & Humidity Sensor Manual

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