Wiki source code of LHT65N LoRaWAN Temperature & Humidity Sensor Manual

Version 57.9 by Xiaoling on 2022/05/23 14:08

version	line-number	content
55.2	1	(% style="text-align:center" %)
56.2	2	[[image:image-20220523115324-1.jpeg\|\|height="500" width="500"]]
55.2	3
2.1	4
56.2	5	LHT65N LoRaWAN Temperature & Humidity Sensor Manual
	6
	7
	8
	9	Table of Contents：
	10
55.2	11	{{toc/}}
2.1	12
55.4	13
	14
52.2	15	= 1.Introduction =
	16
55.2	17	== 1.1 What is LHT65N Temperature & Humidity Sensor ==
52.2	18
56.3	19	(((
56.2	20	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	21	)))
2.1	22
56.3	23	(((
2.1	24	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	25	)))
2.1	26
56.3	27	(((
6.1	28	LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
56.3	29	)))
2.1	30
56.3	31	(((
2.1	32	LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
56.3	33	)))
2.1	34
56.3	35	(((
56.2	36	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	37	)))
2.1	38
56.3	39	(((
6.1	40	*The actual battery life depends on how often to send data, please see the battery analyzer chapter.
56.3	41	)))
2.1	42
55.2	43	== 1.2 Features ==
2.1	44
	45	* Wall mountable
	46	* LoRaWAN v1.0.3 Class A protocol
	47	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
	48	* AT Commands to change parameters
	49	* Remote configure parameters via LoRaWAN Downlink
15.1	50	* Firmware upgradeable via program port
6.1	51	* Built-in 2400mAh battery for up to 10 years of use.
2.1	52	* Built-in Temperature & Humidity sensor
	53	* Optional External Sensors
6.1	54	* Tri-color LED to indicate working status
2.1	55	* Datalog feature
	56
55.2	57	== 1.3 Specification ==
2.1	58
56.3	59	(((
2.1	60	Built-in Temperature Sensor:
56.3	61	)))
2.1	62
56.3	63	* (((
	64	Resolution: 0.01 °C
	65	)))
	66	* (((
	67	Accuracy Tolerance : Typ ±0.3 °C
	68	)))
	69	* (((
	70	Long Term Drift: < 0.02 °C/yr
	71	)))
	72	* (((
	73	Operating Range: -40 ~~ 85 °C
	74	)))
2.1	75
56.3	76	(((
2.1	77	Built-in Humidity Sensor:
56.3	78	)))
2.1	79
56.3	80	* (((
	81	Resolution: 0.04 %RH
	82	)))
	83	* (((
	84	Accuracy Tolerance : Typ ±3 %RH
	85	)))
	86	* (((
	87	Long Term Drift: < 0.02 °C/yr
	88	)))
	89	* (((
	90	Operating Range: 0 ~~ 96 %RH
	91	)))
2.1	92
56.3	93	(((
6.1	94	External Temperature Sensor:
56.3	95	)))
2.1	96
56.3	97	* (((
	98	Resolution: 0.0625 °C
	99	)))
	100	* (((
	101	±0.5°C accuracy from -10°C to +85°C
	102	)))
	103	* (((
	104	±2°C accuracy from -55°C to +125°C
	105	)))
	106	* (((
	107	Operating Range: -55 °C ~~ 125 °C
	108	)))
2.1	109
55.2	110	= 2. Connect LHT65N to IoT Server =
18.1	111
55.2	112	== 2.1 How does LHT65N work? ==
18.1	113
56.4	114	(((
18.1	115	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	116	)))
18.1	117
56.4	118	(((
18.1	119	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	120	)))
18.1	121
55.2	122	== 2.2 How to Activate LHT65N? ==
18.1	123
	124	The LHT65N has two working modes:
	125
	126	* Deep Sleep Mode: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
19.1	127	* 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	128
56.5	129	(((
18.1	130	The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
56.5	131	)))
18.1	132
	133	[[image:image-20220515123819-1.png\|\|height="379" width="317"]]
	134
57.4	135	(% border="1" style="background-color:#ffffcc; color:green; width:739px" %)
	136	\|Behavior on ACT\|Function\|(% style="width:424px" %)Action
	137	\|Pressing ACT between 1s < time < 3s\|Test uplink status\|(% style="width:424px" %)If LHT65N is already Joined to the LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has an external sensor connected, blue led will blink once. If LHT65N has no external sensor, red led will blink once.
	138	\|Pressing ACT for more than 3s\|Active Device\|(% style="width:424px" %)green led will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network. green led will solid turn on for 5 seconds after join in network.
	139	\|Fast press ACT 5 times\|Deactivate Device\|(% style="width:424px" %)red led will solid on for 5 seconds. This means LHT65N is in Deep Sleep Mode.
18.1	140
55.2	141	== 2.3 Example to join LoRaWAN network ==
32.1	142
	143	(% class="wikigeneratedid" %)
	144	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.
	145
	146	(% class="wikigeneratedid" %)
	147	[[image:image-20220522232442-1.png\|\|height="387" width="648"]]
	148
	149	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:
	150
	151
55.3	152	=== 2.3.1 Step 1: Create Device n TTN ===
32.1	153
	154	Create a device in TTN V3 with the OTAA keys from LHT65N.
	155
	156	Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
	157
	158	[[image:image-20220522232812-2.png\|\|height="219" width="279"]]
	159
	160	User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
	161
	162	Add APP EUI in the application.
	163
	164	[[image:image-20220522232916-3.png]]
	165
	166	[[image:image-20220522232932-4.png]]
	167
	168	[[image:image-20220522232954-5.png]]
	169
	170	Note: LHT65N use same payload as LHT65.
	171
	172	[[image:image-20220522233026-6.png]]
	173
	174
	175	Input APP EUI, APP KEY and DEV EUI:
	176
	177	[[image:image-20220522233118-7.png]]
	178
	179
55.2	180	=== 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
32.1	181
	182	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.
	183
57.3	184	[[image:image-20220522233300-8.png\|\|height="219" width="722"]]
32.1	185
	186
55.3	187	== 2.4 Uplink Payload ==
35.1	188
57.2	189	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	190
57.2	191	After each uplink, the (% style="color:blue" %)BLUE LED(%%) will blink once.
35.1	192
	193
57.8	194	(% border="1" style="background-color:#ffffcc; color:green; width:428px" %)
	195	\|(% style="width:106px" %)Size(bytes)\|(% style="width:46px" %)2\|(% style="width:104px" %)2\|(% style="width:80px" %)2\|(% style="width:51px" %)1\|(% style="width:35px" %)4
	196	\|(% style="width:106px" %)Value\|(% style="width:46px" %)[[BAT>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.2BAT-BatteryInfo]]\|(% style="width:104px" %)(((
	197	[[Built-In>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
35.1	198
57.8	199	[[Temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
	200	)))\|(% style="width:80px" %)(((
	201	[[Built-in>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
	202
	203	[[Humidity>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
	204	)))\|(% style="width:51px" %)[[Ext>>path:#Extension_Sensor]] #\|(% style="width:35px" %)[[Ext value>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.6Extvalue]]
	205
35.1	206	* The First 6 bytes: has fix meanings for every LHT65N.
	207	* The 7th byte (EXT #): defines the external sensor model.
	208	* 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.)
	209
55.4	210	=== 2.4.1 Decoder in TTN V3 ===
35.1	211
	212	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.
	213
	214	Below is the position to put the decoder and LHT65N decoder can be download from here:
	215
42.1	216	[[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
35.1	217
57.4	218	[[image:image-20220522234118-10.png\|\|height="353" width="729"]]
35.1	219
55.4	220	=== 2.4.2 BAT-Battery Info ===
42.1	221
	222	These two bytes of BAT include the battery state and the actually voltage
	223
57.8	224	(% border="1" style="background-color:#ffffcc; color:green; width:502px" %)
57.9	225	\|(% style="width:75px" %)(((
	226	Bit(bit)
	227	)))\|(% style="width:259px" %)(((
	228	[15:14]
	229	)))\|(% style="width:164px" %)(((
	230	[13:0]
	231	)))
	232	\|(% style="width:75px" %)(((
	233	Value
	234	)))\|(% style="width:259px" %)(((
	235	(((
42.1	236	BAT Status
57.9	237	)))
42.1	238
57.9	239	(((
42.1	240	00(b): Ultra Low ( BAT <= 2.50v)
57.9	241	)))
42.1	242
57.9	243	(((
42.1	244	01(b): Low (2.50v <=BAT <= 2.55v)
57.9	245	)))
42.1	246
57.9	247	(((
42.1	248	10(b): OK (2.55v <= BAT <=2.65v)
57.9	249	)))
42.1	250
57.9	251	(((
42.1	252	11(b): Good (BAT >= 2.65v)
57.9	253	)))
	254	)))\|(% style="width:164px" %)(((
	255	Actually BAT voltage
	256	)))
42.1	257
57.5	258	[[image:image-20220522235639-1.png\|\|height="139" width="727"]]
42.1	259
	260	Check the battery voltage for LHT65N.
	261
	262	* BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
	263	* Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
	264
55.4	265	=== 2.4.3 Built-in Temperature ===
42.1	266
57.5	267	[[image:image-20220522235639-2.png\|\|height="138" width="722"]]
42.1	268
	269	* Temperature: 0x0ABB/100=27.47℃
	270
	271	[[image:image-20220522235639-3.png]]
	272
	273	* Temperature: (0xF5C6-65536)/100=-26.18℃
	274
55.4	275	=== 2.4.4 Built-in Humidity ===
42.1	276
57.5	277	[[image:image-20220522235639-4.png\|\|height="138" width="722"]]
42.1	278
	279	* Humidity: 0x025C/10=60.4%
	280
55.4	281	=== 2.4.5 Ext # ===
42.1	282
	283	Bytes for External Sensor:
	284
57.5	285	(% border="1" style="background-color:#ffffcc; color:green; width:473px" %)
	286	\|(% style="width:139px" %)EXT # Value\|(% style="width:331px" %)External Sensor Type
	287	\|(% style="width:139px" %)0x01\|(% style="width:331px" %)Sensor E3, Temperature Sensor
	288	\|(% style="width:139px" %)0x09\|(% style="width:331px" %)Sensor E3, Temperature Sensor, Datalog Mod
42.1	289
55.4	290	=== 2.4.6 Ext value ===
42.1	291
55.4	292	==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
42.1	293
	294	[[image:image-20220522235639-5.png]]
	295
	296	* DS18B20 temp=0x0ADD/100=27.81℃
	297
	298	The last 2 bytes of data are meaningless
	299
	300	[[image:image-20220522235639-6.png]]
	301
	302	* External temperature= (0xF54F-65536)/100=-27.37℃
	303
57.5	304	(((
42.1	305	The last 2 bytes of data are meaningless
57.5	306	)))
42.1	307
57.5	308	(((
42.1	309	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	310	)))
42.1	311
	312
55.4	313	==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
42.1	314
	315	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:
	316
57.7	317	(% border="1" style="background-color:#ffffcc; color:green; width:533px" %)
	318	\|(% style="width:96px" %)Size(bytes)\|(% style="width:71px" %)2\|(% style="width:69px" %)2\|(% style="width:88px" %)2\|(% style="width:69px" %)1\|(% style="width:75px" %)4
	319	\|(% style="width:96px" %)Value\|(% style="width:71px" %)[[External temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H4.2SetExternalSensorMode]]\|(% style="width:69px" %)(((
57.5	320	[[Built-In>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
42.1	321
57.5	322	[[Temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
57.7	323	)))\|(% style="width:88px" %)(((
57.5	324	BAT Status &
42.1	325
57.5	326	[[Built-in>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
42.1	327
57.5	328	[[Humidity>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
57.7	329	)))\|(% style="width:69px" %)Status & Ext\|(% style="width:75px" %)(((
57.5	330	[[Unix>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H4.1SetTransmitIntervalTime]]
42.1	331
57.5	332	[[Time Stamp>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H4.1SetTransmitIntervalTime]]
42.1	333	)))
	334
57.6	335	* Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)
42.1	336
57.5	337	(% border="1" style="background-color:#ffffcc; color:green; width:587px" %)
42.1	338	\|Bit(bit)\|(% style="width:280px" %)[15:14]\|(% style="width:136px" %)[11:0]
	339	\|Value\|(% style="width:280px" %)(((
	340	BAT Status
	341
	342	00(b): Ultra Low ( BAT <= 2.50v)
	343
	344	01(b): Low (2.50v <=BAT <= 2.55v)
	345
	346	10(b): OK (2.55v <= BAT <=2.65v)
	347
	348	11(b): Good (BAT >= 2.65v)
	349	)))\|(% style="width:136px" %)(((
57.5	350	[[Built-in Humidity>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
42.1	351
	352
	353	)))
	354
	355	* Status & Ext Byte
	356
57.5	357	(% border="1" style="background-color:#ffffcc; color:green; width:732px" %)
42.1	358	\|(% style="width:128px" %)Bits\|(% style="width:102px" %)7\|(% style="width:145px" %)6\|(% style="width:117px" %)5\|(% style="width:147px" %)4\|(% style="width:90px" %)[3:0]
	359	\|(% style="width:128px" %)Status & Ext\|(% style="width:102px" %)Not Defined\|(% style="width:145px" %)Poll Message Flag\|(% style="width:117px" %)Sync time OK\|(% style="width:147px" %)Unix Time Request\|(% style="width:90px" %)(((
57.5	360	Ext:0b(1001)
42.1	361	)))
	362
	363	* Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
	364	* 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.
	365	* 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)
	366
55.4	367	== 2.5 Show data on Datacake ==
42.1	368
47.1	369	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:
	370
57.6	371	(((
47.1	372	Step 1: Be sure that your device is programmed and properly connected to the LoRaWAN network.
57.6	373	)))
47.1	374
57.6	375	(((
47.1	376	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	377	)))
47.1	378
57.6	379	(((
47.1	380	Add Datacake:
57.6	381	)))
47.1	382
	383	[[image:image-20220523000825-7.png\|\|height="262" width="583"]]
	384
	385
	386	Select default key as Access Key:
	387
	388	[[image:image-20220523000825-8.png\|\|height="453" width="406"]]
	389
	390	In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
	391
	392	[[image:image-20220523000825-9.png\|\|height="366" width="392"]]
	393
	394	[[image:image-20220523000825-10.png\|\|height="432" width="762"]]
	395
55.4	396	== 2.6 Datalog Feature ==
47.1	397
51.1	398	This feature is always enabled. When user wants to retrieve the sensor value, he can send a poll command from the IoT platform to ask LHT65N to send the value in the required time slot.
	399
55.4	400	=== 2.6.1 Unix TimeStamp ===
51.1	401
	402	LHT65N uses Unix TimeStamp format based on
	403
	404	[[image:image-20220523001219-11.png\|\|height="97" width="627"]]
	405
	406
57.6	407	(((
51.1	408	User can get this time from link: [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
57.6	409	)))
51.1	410
57.6	411	(((
51.1	412	Below is the converter example
57.6	413	)))
51.1	414
55.4	415	[[image:image-20220523001219-12.png\|\|height="302" width="730"]]
51.1	416
	417	So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
	418
	419
55.4	420	=== 2.6.2 Set Device Time ===
51.1	421
	422	There are two ways to set device’s time:
	423
	424	~1. Through LoRaWAN MAC Command (Default settings)
	425
	426	User need to set SYNCMOD=1 to enable sync time via MAC command.
	427
	428	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).
	429
	430	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.
	431
	432
	433	2. Manually Set Time
	434
	435	User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
	436
	437
55.4	438	=== 2.6.3 Poll sensor value ===
51.1	439
	440	User can poll sensor value based on timestamps from the server. Below is the downlink command.
	441
	442
55.4	443	(% border="1" style="width:454px" %)
51.1	444	\|(% style="width:69px" %)1byte\|(% style="width:129px" %)4bytes\|(% style="width:134px" %)4bytes\|(% style="width:119px" %)1byte
	445	\|(% style="width:69px" %)31\|(% style="width:129px" %)Timestamp start\|(% style="width:134px" %)Timestamp end\|(% style="width:119px" %)Uplink Interval
	446
	447	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.
	448
	449
	450	For example, downlink command 31 5FC5F350 5FC6 0160 05
	451
	452	Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
	453
	454	Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
	455
	456
55.4	457	=== 2.6.4 Datalog Uplink payload ===
51.1	458
	459	The Datalog poll reply uplink will use below payload format.
	460
	461
	462	Retrieval data payload
	463
55.4	464	(% border="1" %)
51.1	465	\|Size(bytes)\|2\|2\|2\|1\|4
	466	\|Value\|[[External sensor data>>path:#Extension_sensor_value]]\|(((
	467	[[Built-In>>path:#SHT20_Temperature]]
	468
	469	[[Temperature>>path:#SHT20_Temperature]]
	470	)))\|(((
	471	[[Built-in>>path:#SHT20_Humidity]]
	472
	473	[[Humidity>>path:#SHT20_Humidity]]
	474	)))\|[[Poll message flag & Ext>>path:#Poll_EXT]]\|(((
	475	[[Unix Time Stamp>>path:#Unix_Time_Stamp]]
	476
	477
	478	)))
	479
	480	Poll message flag & Ext
	481
	482
55.4	483	(% border="1" %)
51.1	484	\|Bits\|7\|6\|5\|4\|[3:0]
	485	\|Status & Ext\|Not Defined\|Poll Message Flag\|Sync time OK\|Unix Time Request\|(((
	486	Ext:
	487
	488	0b(1001)
	489	)))
	490
	491	Poll Message Flag: 1: This message is a poll message reply.
	492
	493	* Poll Message Flag is set to 1.
	494	* Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
	495
	496	For example, in US915 band, the max payload for different DR is:
	497
	498	a) DR0: max is 11 bytes so one entry of data
	499
	500	b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
	501
	502	c) DR2: total payload includes 11 entries of data
	503
	504	d) DR3: total payload includes 22 entries of data.
	505
	506	If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0
	507
	508
	509	Example:
	510
	511	If LHT65N has below data inside Flash:
	512
	513	Flash Addr \|Unix Time \| Ext \| BAT voltage\| Value
	514
	515	80196E0 21/1/19 04:27:03 1 3145 sht_temp=22.00 sht_hum=32.6 ds_temp=327.67
	516
	517	80196F0 21/1/19 04:28:57 1 3145 sht_temp=21.90 sht_hum=33.1 ds_temp=327.67
	518
	519	8019700 21/1/19 04:30:30 1 3145 sht_temp=21.81 sht_hum=33.4 ds_temp=327.67
	520
	521	8019710 21/1/19 04:40:30 1 3145 sht_temp=21.65 sht_hum=33.7 ds_temp=327.67
	522
	523	8019720 21/1/19 04:50:30 1 3147 sht_temp=21.55 sht_hum=34.1 ds_temp=327.67
	524
	525	8019730 21/1/19 05:00:30 1 3149 sht_temp=21.50 sht_hum=34.1 ds_temp=327.67
	526
	527	8019740 21/1/19 05:10:30 1 3149 sht_temp=21.43 sht_hum=34.6 ds_temp=327.67
	528
	529	8019750 21/1/19 05:20:30 1 3151 sht_temp=21.35 sht_hum=34.9 ds_temp=327.67
	530
	531
	532	If user sends below downlink command:
	533
	534	3160065F9760066DA705
	535
	536	Where : Start time: 60065F97 = time 21/1/19 04:27:03
	537
	538	Stop time 60066DA7= time 21/1/19 05:27:03
	539
	540
	541	LHT65N will uplink this payload.
	542
55.4	543	[[image:image-20220523001219-13.png\|\|height="421" width="727"]]
51.1	544
	545	7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
	546
	547	Where the first 11 bytes is for the first entry:
	548
	549	7FFF089801464160065F97
	550
	551	Ext sensor data=0x7FFF/100=327.67
	552
	553	Temp=0x0898/100=22.00
	554
	555	Hum=0x0146/10=32.6
	556
	557	poll message flag & Ext=0x41,means reply data,Ext=1
	558
	559	Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
	560
	561
55.4	562	== 2.7 Alarm Mode ==
51.1	563
	564	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.
	565
	566
	567	Note: Alarm mode will increase a little big the power consumption, we recommend extending the normal reading time when enabling this feature.
	568
	569
	570	AT Commands for Alarm mode:
	571
	572	AT+WMOD=1: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
	573
	574	AT+CITEMP=1: The interval to check the temperature for Alarm. (Unit: minute)
	575
	576
	577
55.4	578	== 2.8 LED Indicator ==
18.1	579
19.1	580	The LHT65N has a triple color LED which for easy shows different stage.
	581
	582	While pressing ACT button, the LED will work as per LED status with ACT button.
	583
	584	In a normal working state:
	585
	586	* For each uplink, the BLUE LED or RED LED will blink once.
	587	* BLUE LED when an external sensor is connected
	588	* RED LED when an external sensor is not connected
	589	* For each success downlink, the PURPLE LED will blink once
	590
23.1	591	----
19.1	592
55.4	593	== 2.9 Installation ==
21.1	594
52.1	595	[[image:image-20220516231650-1.png\|\|height="436" width="428"]]
21.1	596
55.4	597	= 3. Sensors & Accessories =
21.1	598
55.4	599	== 3.1 E3 Temperature Probe ==
21.1	600
14.1	601	[[image:image-20220515080154-4.png\|\|height="182" width="161"]] [[image:image-20220515080330-5.png\|\|height="201" width="195"]]
	602
	603
	604	With Temperature sensor with 2 meters cable long
	605
	606	* Resolution: 0.0625 °C
	607	* ±0.5°C accuracy from -10°C to +85°C
	608	* ±2°C accuracy from -55°C to +125°C
	609	* Operating Range: -40 ~~ 125 °C
	610	* -55°C to 125°C
	611	* Working voltage 2.35v ~~ 5v
	612
55.4	613	= 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
52.1	614
	615	Use can configure LHT65N via AT Command or LoRaWAN Downlink.
	616
	617	* AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
	618	* LoRaWAN Downlink instruction for different platforms:
	619
	620	[[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]]
	621
	622	There are two kinds of commands to configure LHT65N, they are:
	623
	624	* General Commands.
	625
	626	These commands are to configure:
	627
	628	* General system settings like: uplink interval.
	629	* LoRaWAN protocol & radio-related commands.
	630
	631	They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~~). These commands can be found on the wiki:
	632
	633	[[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
	634
	635	* Commands special design for LHT65N
	636
	637	These commands are only valid for LHT65N, as below:
	638
55.4	639	== 4.1 Set Transmit Interval Time ==
52.1	640
	641	Feature: Change LoRaWAN End Node Transmit Interval.
	642
	643	AT Command: AT+TDC
	644
55.4	645	(% border="1" %)
52.1	646	\|Command Example\|Function\|Response
	647	\|AT+TDC?\|Show current transmit Interval\|(((
	648	30000
	649
	650	OK
	651
	652	the interval is 30000ms = 30s
	653	)))
	654	\|AT+TDC=60000\|Set Transmit Interval\|(((
	655	OK
	656
	657	Set transmit interval to 60000ms = 60 seconds
	658	)))
	659
	660	Downlink Command: 0x01
	661
	662	Format: Command Code (0x01) followed by 3 bytes time value.
	663
	664	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
	665
	666	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	667	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	668
55.4	669	== 4.2 Set External Sensor Mode ==
52.1	670
	671	Feature: Change External Sensor Mode.
	672
	673	AT Command: AT+EXT
	674
55.4	675	(% border="1" %)
52.1	676	\|Command Example\|Function\|Response
	677	\|AT+EXT?\|Get current external sensor mode\|(((
	678	1
	679
	680	OK
	681
	682	External Sensor mode =1
	683	)))
	684	\|AT+EXT=1\|(% colspan="2" %)Set external sensor mode to 1
	685	\|AT+EXT=9\|(% colspan="2" %)Set to external DS18B20 with timestamp
	686
	687	Downlink Command: 0xA2
	688
	689	Total bytes: 2 ~~ 5 bytes
	690
	691	Example:
	692
	693	* 0xA201: Set external sensor type to E1
	694	* 0xA209: Same as AT+EXT=9
	695	* 0xA20702003c,Same as AT+SETCNT=60
	696
55.4	697	== 4.3 Enable/Disable uplink Temperature probe ID ==
52.1	698
	699	Feature: If PID is enabled, device will send the temperature probe ID on:
	700
	701	* First Packet after OTAA Join
	702	* Every 24 hours since the first packet.
	703
	704	PID is default set to disable (0)
	705
	706
	707	AT Command:
	708
55.4	709	(% border="1" %)
52.1	710	\|Command Example\|Function\|Response
	711	\|AT+PID=1\|Enable PID uplink\|OK
	712
	713	Downlink Command:
	714
	715	* 0xA800 à AT+PID=0
	716	* 0xA801 à AT+PID=1
	717
55.4	718	== 4.4 Set Password ==
52.1	719
	720	Feature: Set device password, max 9 digits
	721
	722	AT Command: AT+PWORD
	723
55.4	724	(% border="1" %)
52.1	725	\|Command Example\|Function\|Response
	726	\|AT+PWORD=?\|Show password\|(((
	727	123456
	728
	729
	730	OK
	731	)))
	732	\|AT+PWORD=999999\|Set password\|OK
	733
	734	Downlink Command:
	735
	736	No downlink command for this feature.
	737
55.4	738	== 4.5 Quit AT Command ==
52.1	739
	740	Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
	741
	742	AT Command: AT+DISAT
	743
55.4	744	(% border="1" %)
52.1	745	\|Command Example\|Function\|Response
	746	\|AT+DISAT\|Quit AT Commands mode\|OK
	747
	748	Downlink Command:
	749
	750	No downlink command for this feature.
	751
	752
55.4	753	== 4.6 Set to sleep mode ==
52.1	754
	755	Feature: Set device to sleep mode
	756
	757	AT Command: AT+SLEEP
	758
55.4	759	(% border="1" %)
52.1	760	\| \| \|
	761	\|Command Example\|Function\|Response
	762	\|AT+SLEEP\|Set to sleep mode\|(((
	763	Clear all stored sensor data…
	764
	765	OK
	766	)))
	767
	768	Downlink Command:
	769
	770	* There is no downlink command to set to Sleep mode.
	771
55.4	772	== 4.7 Set system time ==
52.1	773
	774	Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
	775
	776	AT Command:
	777
55.4	778	(% border="1" %)
52.1	779	\|Command Example\|Function
	780	\|AT+TIMESTAMP=1611104352\|(((
	781	OK
	782
	783	Set System time to 2021-01-20 00:59:12
	784	)))
	785
	786	Downlink Command:
	787
	788	0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
	789
55.4	790	== 4.8 Set Time Sync Mode ==
52.1	791
	792	Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
	793
	794	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.
	795
	796
	797	AT Command:
	798
	799	\|Command Example\|Function
	800	\|AT+SYNCMOD=1\|Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
	801
	802	Downlink Command:
	803
	804	0x28 01 ~/~/ Same As AT+SYNCMOD=1
	805
	806	0x28 00 ~/~/ Same As AT+SYNCMOD=0
	807
55.4	808	== 4.9 Set Time Sync Interval ==
52.1	809
	810	Feature: Define System time sync interval. SYNCTDC default value: 10 days.
	811
	812	AT Command:
	813
55.4	814	(% border="1" %)
52.1	815	\|Command Example\|Function
	816	\|AT+SYNCTDC=0x0A\|Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
	817
	818	Downlink Command:
	819
	820	0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
	821
55.4	822	== 4.10 Print data entries base on page. ==
52.1	823
	824	Feature: Print the sector data from start page to stop page (max is 416 pages).
	825
	826	AT Command: AT+PDTA
	827
55.4	828	(% border="1" %)
52.1	829	\|Command Example\|Response
	830	\|(((
	831	AT+PDTA=1,3
	832
	833
	834
	835	Print page 1 to 3
	836	)))\|(((
	837	8019500 19/6/26 16:48 1 2992 sht_temp=28.21 sht_hum=71.5 ds_temp=27.31
	838
	839	8019510 19/6/26 16:53 1 2994 sht_temp=27.64 sht_hum=69.3 ds_temp=26.93
	840
	841	8019520 19/6/26 16:58 1 2996 sht_temp=28.39 sht_hum=72.0 ds_temp=27.06
	842
	843	8019530 19/6/26 17:03 1 2996 sht_temp=27.97 sht_hum=70.4 ds_temp=27.12
	844
	845	8019540 19/6/26 17:08 1 2996 sht_temp=27.80 sht_hum=72.9 ds_temp=27.06
	846
	847	8019550 19/6/26 17:13 1 2998 sht_temp=27.30 sht_hum=72.4 ds_temp=26.68
	848
	849	8019560 19/6/26 17:22 1 2992 sht_temp=26.27 sht_hum=62.3 ds_temp=26.56
	850
	851	8019570
	852
	853	8019580
	854
	855	8019590
	856
	857	80195A0
	858
	859	80195B0
	860
	861	80195C0
	862
	863	80195D0
	864
	865	80195E0
	866
	867	80195F0
	868
	869
	870	OK
	871	)))
	872
	873	Downlink Command:
	874
	875	No downlink commands for feature
	876
55.4	877	== 4.11 Print last few data entries. ==
52.1	878
	879	Feature: Print the last few data entries
	880
	881	AT Command: AT+PLDTA
	882
55.4	883	(% border="1" %)
52.1	884	\|Command Example\|Response
	885	\|(((
	886	AT+PLDTA=5
	887
	888
	889
	890	Print last 5 entries
	891	)))\|(((
	892	Stop Tx and RTP events when read sensor data
	893
	894	1 19/6/26 13:59 1 3005 sht_temp=27.09 sht_hum=79.5 ds_temp=26.75
	895
	896	2 19/6/26 14:04 1 3007 sht_temp=26.65 sht_hum=74.8 ds_temp=26.43
	897
	898	3 19/6/26 14:09 1 3007 sht_temp=26.91 sht_hum=77.9 ds_temp=26.56
	899
	900	4 19/6/26 14:15 1 3007 sht_temp=26.93 sht_hum=76.7 ds_temp=26.75
	901
	902	5 19/6/26 14:20 1 3007 sht_temp=26.78 sht_hum=76.6 ds_temp=26.43
	903
	904	Start Tx and RTP events
	905
	906	OK
	907	)))
	908
	909	Downlink Command:
	910
	911	No downlink commands for feature
	912
55.4	913	== 4.12 Clear Flash Record ==
52.1	914
	915	Feature: Clear flash storage for data log feature.
	916
	917	AT Command: AT+CLRDTA
	918
55.4	919	(% border="1" %)
52.1	920	\|Command Example\|Function\|Response
	921	\|AT+CLRDTA\|Clear date record\|(((
	922	Clear all stored sensor data…
	923
	924	OK
	925	)))
	926
	927	Downlink Command: 0xA3
	928
	929	* Example: 0xA301 ~/~/Same as AT+CLRDTA
	930
55.4	931	= 5. Battery & How to replace =
52.1	932
55.4	933	== 5.1 Battery Type ==
11.1	934
	935	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.
	936
	937	The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
14.1	938	[[image:image-20220515075034-1.png\|\|height="208" width="644"]]
11.1	939
	940	The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
	941
	942
55.4	943	== 5.2 Replace Battery ==
11.1	944
	945	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.
	946
	947	[[image:image-20220515075440-2.png\|\|height="338" width="272"]][[image:image-20220515075625-3.png\|\|height="193" width="257"]]
	948
55.4	949	== 5.3 Battery Life Analyze ==
11.1	950
	951	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:
	952	https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
	953
55.4	954	= 6. Order Info =
11.1	955
14.1	956	Part Number: (% class="mark" %)LHT65N-XX
2.1	957
	958	XX: The default frequency band
	959
	960	* AS923: LoRaWAN AS923 band
	961	* AU915: LoRaWAN AU915 band
	962	* EU433: LoRaWAN EU433 band
	963	* EU868: LoRaWAN EU868 band
	964	* KR920: LoRaWAN KR920 band
	965	* US915: LoRaWAN US915 band
	966	* IN865: LoRaWAN IN865 band
	967	* CN470: LoRaWAN CN470 band
4.1	968
14.1	969	YY: Sensor Accessories
	970
	971	* E3: External Temperature Probe
	972
55.4	973	= 7. Packing Info =
4.1	974
	975	Package Includes:
	976
	977	* LHT65N Temperature & Humidity Sensor x 1
	978	* Program cable x 1
	979	* Optional external sensor
	980
	981	Dimension and weight:
	982
	983	* Device Size: 13.5 x 7 x 3 cm
	984	* Device Weight: 105g
	985	* Package Size / pcs : 14.5 x 8 x 5 cm
	986	* Weight / pcs : 170g
	987
55.4	988	= 8. FCC Warning =
7.1	989
	990	This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
	991
55.4	992	(1) This device may not cause harmful interference；
7.1	993
55.4	994	(2) this device must accept any interference received, including interference that may cause undesired operation.

Wiki source code of LHT65N LoRaWAN Temperature & Humidity Sensor Manual

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