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Last modified by Mengting Qiu on 2025/07/03 14:48
From version 152.1
edited by Edwin Chen
on 2022/06/19 09:24
Change comment: There is no comment for this version
To version 172.3
edited by Xiaoling
on 2022/06/21 09:46
Change comment: There is no comment for this version

Summary

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Title
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1 -LHT65N LoRaWAN Temperature & Humidity Sensor Manual
1 +LHT52 - LoRaWAN Temperature & Humidity Sensor User Manual
Parent
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1 -Main.WebHome
1 +Main.User Manual for LoRaWAN End Nodes.WebHome
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Edwin
1 +XWiki.Xiaoling
Content
... ... @@ -1,23 +1,23 @@
1 1  (% style="text-align:center" %)
2 -[[image:image-20220613162008-1.png||_mstalt="428142" height="579" width="379"]]
2 +[[image:1655774244188-589.png]]
3 3  
4 4  
5 5  
6 6  
7 -
8 8  (% _mstvisible="1" %)
9 9  (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
10 10  
11 -{{toc/}}
12 12  
13 13  
14 14  
15 15  
14 +
15 +
16 16  (% _mstvisible="1" %)
17 -= (% _msthash="277498" _msttexthash="253045" _mstvisible="3" %)1. Introduction(%%) =
17 += (% _msthash="277498" _msttexthash="253045" _mstvisible="3" %)1.  Introduction(%%) =
18 18  
19 19  (% _mstvisible="1" %)
20 -== (% _msthash="1532895" _msttexthash="1426958" _mstvisible="3" %)1.1 What is LHT65N Temperature & Humidity Sensor(%%) ==
20 +== (% _msthash="1532895" _msttexthash="1426958" _mstvisible="3" %)1.1  What is LHT52 Temperature & Humidity Sensor(%%) ==
21 21  
22 22  (% _mstvisible="1" %)
23 23  (((
... ... @@ -24,61 +24,50 @@
24 24  (% _msthash="506051" _msttexthash="24333127" _mstvisible="2" %)
25 25  
26 26  
27 -(% _msthash="506051" _msttexthash="24333127" _mstvisible="2" %)
28 -The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% _mstvisible="4" style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% _mstvisible="4" style="color:#4f81bd" %)**Temperature Sensor**(% _mstvisible="3" %)**.**
29 -)))
27 +The Dragino LHT52 Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:blue" %)**built-in Temperature & Humidity sensor** (%%)and has a USB Type-C sensor connector to connect to external sensors such as external Temperature Sensor.
30 30  
31 -(% _mstvisible="1" %)
32 -(((
33 -(% _msthash="506052" _msttexthash="66005810" _mstvisible="2" %)
34 -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.
35 -)))
29 +LHT52 (% style="color:blue" %)**senses environment temperature and humidity**(%%) and send these values via long-range wireless LoRaWAN protocol. It targets professional wireless sensor network applications such as food service, smart metering, smart cities, building automation, and so on.
36 36  
37 -(% _mstvisible="1" %)
38 -(((
39 -(% _msthash="506053" _msttexthash="4298047" _mstvisible="2" %)
40 -LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
41 -)))
31 +LHT52 supports(% style="color:blue" %)** 2 x AAA batteries **(%%)and works for a long time up to several years. Use can replace the batteries easily after they are finished.
42 42  
43 -(% _mstvisible="1" %)
44 -(((
45 -(% _msthash="506054" _msttexthash="6016374" _mstvisible="2" %)
46 -LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
47 -)))
33 +LHT52 is fully compatible with LoRaWAN v1.0.3 protocol, it can work with standard LoRaWAN gateway.
48 48  
49 -(% _mstvisible="1" %)
50 -(((
51 -(% _msthash="506055" _msttexthash="17023136" _mstvisible="2" %)
52 -LHT65N supports (% _mstvisible="4" 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.
35 +LHT52 supports(% style="color:blue" %)** Datalog feature** (%%)to make sure users won’t miss sensor data. It records sensor value for every uplink. These values can be retrieved by LoRaWAN server via downlink command.
36 +
37 +LHT52 supports(% style="color:blue" %)** temperature alarm feature**(%%). It can uplink alarm in a short interval while temperature exceeds preset limits.
38 +
39 +*Battery life depends how often to send data, please see [[battery analyzer>>||anchor="H4.2A0PowerConsumptionAnalyze"]].
40 +
41 +(% _msthash="506051" _msttexthash="24333127" _mstvisible="2" %)
42 +[[image:1655774519494-861.png]]
53 53  )))
54 54  
55 55  (% _mstvisible="1" %)
56 56  (((
57 57  (% _msthash="506056" _msttexthash="5557097" _mstvisible="2" %)
58 -*The actual battery life depends on how often to send data, please see the battery analyzer chapter.
59 -
60 -(% _msthash="506056" _msttexthash="5557097" _mstvisible="2" %)
61 61  
62 62  )))
63 63  
64 64  (% _mstvisible="1" %)
65 -== (% _msthash="182559" _msttexthash="163319" _mstvisible="3" %)1.2 Features(%%) ==
52 +== (% _msthash="182559" _msttexthash="163319" _mstvisible="3" %)1.2  Features(%%) ==
66 66  
67 67  (% _mstvisible="1" %)
68 -* Wall mountable
69 -* LoRaWAN v1.0.3 Class A protocol
55 +* Wall Attachable.
56 +* LoRaWAN v1.0.3 Class A protocol.
57 +* Built-in Temperature & Humidity sensor
58 +* Optional External Probe
70 70  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
71 71  * AT Commands to change parameters
72 72  * Remote configure parameters via LoRaWAN Downlink
73 -* Firmware upgradeable via program port
74 -* Built-in 2400mAh battery for up to 10 years of use.
75 -* Built-in Temperature & Humidity sensor
76 -* Optional External Sensors
77 -* Tri-color LED to indicate working status
62 +* Firmware upgradable via program port
63 +* Support 2 x AAA LR03 batteries.
78 78  * Datalog feature
65 +* IP Rating: IP52
79 79  
67 +
68 +
80 80  (% _mstvisible="1" %)
81 -== (% _msthash="323570" _msttexthash="297635" _mstvisible="3" %)1.3 Specification(%%) ==
70 +== (% _msthash="323570" _msttexthash="297635" _mstvisible="3" %)1.3  Specification(%%) ==
82 82  
83 83  (% _mstvisible="1" %)
84 84  (((
... ... @@ -89,27 +89,10 @@
89 89  (% _msthash="506057" _msttexthash="671437" _mstvisible="4" %)**Built-in Temperature Sensor:**
90 90  )))
91 91  
92 -(% _mstvisible="1" %)
93 -* (% _mstvisible="3" %)
94 -(((
95 -(% _msthash="902993" _msttexthash="294424" _mstvisible="4" %)
96 -Resolution: 0.01 °C
97 -)))
98 -* (% _mstvisible="3" %)
99 -(((
100 -(% _msthash="902994" _msttexthash="690664" _mstvisible="4" %)
101 -Accuracy Tolerance : Typ ±0.3 °C
102 -)))
103 -* (% _mstvisible="3" %)
104 -(((
105 -(% _msthash="902995" _msttexthash="504647" _mstvisible="4" %)
106 -Long Term Drift: < 0.02 °C/yr
107 -)))
108 -* (% _mstvisible="3" %)
109 -(((
110 -(% _msthash="902996" _msttexthash="478257" _mstvisible="4" %)
111 -Operating Range: -40 ~~ 85 °C
112 -)))
81 +* Resolution: 0.01 °C
82 +* Accuracy Tolerance: Typ ±0.3 °C
83 +* Long Term Drift: < 0.02 °C/yr
84 +* Operating Range: -20 ~~ 50 °C
113 113  
114 114  (% _mstvisible="1" %)
115 115  (((
... ... @@ -118,122 +118,112 @@
118 118  
119 119  (% _mstvisible="2" %)
120 120  (% _msthash="506058" _msttexthash="544453" _mstvisible="4" %)**Built-in Humidity Sensor:**
121 -)))
122 122  
123 -(% _mstvisible="1" %)
124 -* (% _mstvisible="3" %)
125 -(((
126 -(% _msthash="902997" _msttexthash="282438" _mstvisible="4" %)
127 -Resolution: 0.04 %RH
94 +
95 +* Resolution: 0.1 %RH
96 +* Accuracy Tolerance: Typ ±3 %RH
97 +* Long Term Drift: < 0.02 °C/yr
98 +* Operating Range: 0 ~~ 99.0 %RH(no Dew)
128 128  )))
129 -* (% _mstvisible="3" %)
130 -(((
131 -(% _msthash="902998" _msttexthash="628771" _mstvisible="4" %)
132 -Accuracy Tolerance : Typ ±3 %RH
133 -)))
134 -* (% _mstvisible="3" %)
135 -(((
136 -(% _msthash="902999" _msttexthash="504647" _mstvisible="4" %)
137 -Long Term Drift: < 0.02 °C/yr
138 -)))
139 -* (% _mstvisible="3" %)
140 -(((
141 -(% _msthash="903000" _msttexthash="421291" _mstvisible="4" %)
142 -Operating Range: 0 ~~ 96 %RH
143 -)))
144 144  
145 145  (% _mstvisible="1" %)
146 146  (((
147 147  (% _mstvisible="2" %)
148 148  
149 -
150 -(% _mstvisible="2" %)
151 -(% _msthash="506059" _msttexthash="680537" _mstvisible="4" %)**External Temperature Sensor:**
152 152  )))
153 153  
154 -(% _mstvisible="1" %)
155 -* (% _mstvisible="3" %)
107 +(% _mstvisible="3" %)
156 156  (((
157 -(% _msthash="903001" _msttexthash="332254" _mstvisible="4" %)
158 -Resolution: 0.0625 °C
159 -)))
160 -* (% _mstvisible="3" %)
161 -(((
162 -(% _msthash="903002" _msttexthash="782600" _mstvisible="4" %)
163 -±0.5°C accuracy from -10°C to +85°C
164 -)))
165 -* (% _mstvisible="3" %)
166 -(((
167 -(% _msthash="903003" _msttexthash="729482" _mstvisible="4" %)
168 -±2°C accuracy from -55°C to +125°C
169 -)))
170 -* (% _mstvisible="3" %)
171 -(((
172 -(% _msthash="903004" _msttexthash="592540" _mstvisible="4" %)
173 -Operating Range: -55 °C ~~ 125 °C
109 +
174 174  
175 175  
176 176  (% _msthash="903004" _msttexthash="592540" _mstvisible="4" %)
113 +== 1.4  Power Consumption ==
114 +
115 +LHT52 (without external sensor): Idle: 5uA, Transmit: max 110mA
116 +
117 +LHT52 + External Temperature Probe (AS-01): Idle: 6uA, Transmit: max 110mA.
118 +
119 +
120 +
121 +== 1.5  Storage & Operation Temperature ==
122 +
123 +-20°C to +50°C
124 +
125 +
126 +
127 +== 1.6  Applications ==
128 +
129 +* Smart Buildings & Home Automation
130 +* Logistics and Supply Chain Management
131 +* Smart Metering
132 +* Smart Agriculture
133 +* Smart Cities
134 +* Smart Factory
135 +
177 177  
178 178  )))
179 179  
180 180  (% _mstvisible="1" %)
181 -= (% _msthash="655759" _msttexthash="618618" _mstvisible="3" %)2. Connect LHT65N to IoT Server(%%) =
140 += (% _msthash="655759" _msttexthash="618618" _mstvisible="3" %)2.  O(%%)peration Mode =
182 182  
183 183  (% _mstvisible="1" %)
184 -== (% _msthash="462371" _msttexthash="410332" _mstvisible="3" %)2.1 How does LHT65N work?(%%) ==
143 +== (% _msthash="462371" _msttexthash="410332" _mstvisible="3" %)2.1 How it work?(%%) ==
185 185  
186 186  (% _mstvisible="1" %)
187 187  (((
188 188  (% _msthash="506060" _msttexthash="28254538" _mstvisible="2" %)
189 -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.
148 +Each LHT52 is shipped with a worldwide unique set of LoRaWAN OTAA keys. To use LHT52 in a LoRaWAN network, user needs to input the OTAA keys in LoRaWAN network server. After this, if LHT52 is under this LoRaWAN network coverage, LHT52 can join the LoRaWAN network and start to transmit sensor data. The default period for each uplink is** 20 minutes**.
149 +
150 +(% _msthash="506060" _msttexthash="28254538" _mstvisible="2" %)
151 +
190 190  )))
191 191  
192 192  (% _mstvisible="1" %)
193 193  (((
194 194  (% _msthash="506061" _msttexthash="48200724" _mstvisible="2" %)
195 -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.
196 -
197 -(% _msthash="506061" _msttexthash="48200724" _mstvisible="2" %)
198 198  
199 199  )))
200 200  
201 201  (% _mstvisible="1" %)
202 -== (% _msthash="514384" _msttexthash="458666" _mstvisible="3" %)2.2 How to Activate LHT65N?(%%) ==
161 +== (% _msthash="514384" _msttexthash="458666" _mstvisible="3" %)2.2 How to Activate LHT52?(%%) ==
203 203  
204 -(% _msthash="315239" _msttexthash="748241" _mstvisible="1" %)
205 -The LHT65N has two working modes:
163 +(% style="color:red" %)** 1.  Open enclosure from below position.**
206 206  
207 -(% _mstvisible="1" %)
208 -* (% 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.
209 -* (% 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. 
165 +[[image:image-20220621093835-1.png]]
210 210  
211 -(% _mstvisible="1" %)
212 -(((
213 -(% _msthash="506062" _msttexthash="6036823" _mstvisible="2" %)
214 -The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
215 -)))
216 216  
217 -(% _mstvisible="1" %)
218 -[[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
168 +(% style="color:red" %)** 2.  Insert 2 x AAA LR03 batteries.**
219 219  
220 -(% _mstvisible="1" %)
221 -[[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
170 +[[image:image-20220621093835-2.png]]
222 222  
223 223  
173 +(% style="color:red" %)** 3.  Press the reset button to activate device.**
174 +
175 +[[image:image-20220621093835-3.png]]
176 +
177 +
178 +User can check [[LED Status>>||anchor="H2.8A0LEDIndicator"]] to know the working state of LHT52.
179 +
180 +
181 +
224 224  (% _mstvisible="1" %)
225 225  == (% _msthash="882726" _msttexthash="838526" _mstvisible="3" %)2.3 Example to join LoRaWAN network(%%) ==
226 226  
227 -(% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
228 -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.
185 +This section shows an example for how to join the [[TheThingsNetwork>>url:https://www.thethingsnetwork.org/]] LoRaWAN IoT server. Usages with other LoRaWAN IoT servers are of similar procedure.
229 229  
230 230  (% _mstvisible="1" class="wikigeneratedid" %)
231 -[[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
188 +[[image:1655775912928-657.png]]
232 232  
233 -(% _msthash="315241" _msttexthash="10802155" _mstvisible="1" %)
234 -Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
190 +Assume the DLOS8 is already set to connect to [[TTN V3 network >>url:https://eu1.cloud.thethings.network/]]. We need to add the LHT52 device in TTN V3 portal.
235 235  
236 236  
193 +**Step 1**: Create a device in TTN V3 with the OTAA keys from LHT52.
194 +
195 +Each LHT52 is shipped with a sticker with the default DEV EUI as below:
196 +
197 +
198 +
237 237  (% _mstvisible="1" %)
238 238  === (% _msthash="670592" _msttexthash="634075" _mstvisible="3" %)2.3.1 Step 1: Create Device n TTN(%%) ===
239 239  
... ... @@ -471,7 +471,6 @@
471 471  )))
472 472  
473 473  
474 -
475 475  (% _mstvisible="1" %)
476 476  ==== (% _msthash="1389752" _msttexthash="1234766" _mstvisible="3" %)2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp(%%) ====
477 477  
... ... @@ -592,6 +592,18 @@
592 592  * 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.
593 593  * 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)
594 594  
556 +==== (% _msthash="1389752" _msttexthash="1234766" _mstvisible="3" %)2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable)(%%) ====
557 +
558 +In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
559 +
560 +be used to power the external ADC sensor; user can control the power on time for this
561 +
562 +sensor by setting:
563 +
564 +AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
565 +
566 +
567 +
595 595  (% _mstvisible="1" %)
596 596  == (% _msthash="487097" _msttexthash="454818" _mstvisible="3" %)2.5 Show data on Datacake(%%) ==
597 597  
... ... @@ -1151,7 +1151,7 @@
1151 1151  (% _msthash="604150" _msttexthash="563212" _mstvisible="1" style="text-align: left;" %)
1152 1152  = (% _msthash="401388" _msttexthash="566956" _mstvisible="3" %)3. S(% _msthash="903005" _msttexthash="1647204" _mstvisible="2" %)ensors(% _msthash="401388" _msttexthash="40417" _mstvisible="3" %) and A(% _msthash="903005" _msttexthash="1647204" _mstvisible="2" %)ccessories(%%) =
1153 1153  
1154 -(% _msthidden="1" _mstvisible="1" class="wikigeneratedid" style="text-align: left;" %)
1127 +(% _msthidden="1" _mstvisible="1" style="text-align: left;" %)
1155 1155  == (% _msthash="903005" _msttexthash="1647204" _mstvisible="2" %)3.1(% _msthash="487110" _msttexthash="455390" %) E2 Extension Cable(%%) ==
1156 1156  
1157 1157  [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
... ... @@ -1918,7 +1918,7 @@
1918 1918  (% _msthash="506131" _msttexthash="14585714" %)
1919 1919  AT commands：
1920 1920  
1921 -[[image:image-20220615092034-1.png||_mstalt="428870"]]
1894 +[[image:image-20220620153708-1.png||height="603" width="723"]]
1922 1922  
1923 1923  (% _msthash="506132" _msttexthash="337922" %)
1924 1924  Downlink commands:
... ... @@ -1927,13 +1927,13 @@
1927 1927  (% _msthash="506133" _msttexthash="33046" %)
1928 1928  **TTN:**
1929 1929  
1930 -[[image:image-20220615092124-2.png||_mstalt="429221" height="843" width="893"]]
1903 +[[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1931 1931  
1932 1932  
1933 1933  (% _msthash="506134" _msttexthash="11113791" %)
1934 1934  **Helium：**
1935 1935  
1936 -[[image:image-20220615092551-3.png||_mstalt="430794" height="556" width="1097"]]
1909 +[[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1937 1937  
1938 1938  
1939 1939  (% _msthash="506135" _msttexthash="4159844" %)
... ... @@ -1941,13 +1941,13 @@
1941 1941  
1942 1942  [[image:image-20220615094850-6.png||_mstalt="433082"]]
1943 1943  
1944 -[[image:image-20220615094904-7.png||_mstalt="433485" height="329" width="1067"]]
1917 +[[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1945 1945  
1946 1946  
1947 1947  (% _msthash="506136" _msttexthash="39286" %)
1948 1948  **Aws:**
1949 1949  
1950 -[[image:image-20220615092939-4.png||_mstalt="434460" height="532" width="1062"]]
1923 +[[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1951 1951  
1952 1952  
1953 1953  == (% _msthash="1220570" _msttexthash="33199257" %)6.3 How to change the uplink interval？(%%) ==
... ... @@ -1960,6 +1960,8 @@
1960 1960  
1961 1961  [[image:image-20220615153355-1.png]]
1962 1962  
1936 +[[image:image-20220620154900-5.jpeg||height="427" width="570"]]
1937 +
1963 1963  (% style="background-color:yellow" %)**1 < - -> GND  < - ->  Black**
1964 1964  
1965 1965  (% style="background-color:yellow" %)**5 < - ->  RXD  < - ->  White**
... ... @@ -1966,9 +1966,10 @@
1966 1966  
1967 1967  (% style="background-color:yellow" %)**9 < - ->  TXD  < - ->  Green**
1968 1968  
1969 -[[image:image-20220615153914-2.jpeg||height="608" width="456"]]
1970 1970  
1945 +To switch from download mode to command mode, press reset key
1971 1971  
1947 +
1972 1972  (((
1973 1973  (% _msthash="736728" _msttexthash="67213055" %)
1974 1974  (((
... ... @@ -1980,7 +1980,7 @@
1980 1980  (% _msthash="736729" _msttexthash="1907009" %)
1981 1981  Input password and ATZ to activate LHT65N,As shown below:
1982 1982  
1983 -[[image:image-20220615154519-3.png]]
1959 +[[image:image-20220615154519-3.png||height="672" width="807"]]
1984 1984  
1985 1985  
1986 1986  )))
... ... @@ -1987,8 +1987,11 @@
1987 1987  
1988 1988  == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1989 1989  
1966 +
1990 1990  [[image:image-20220615153355-1.png]]
1991 1991  
1969 +(% style="background-color:yellow" %)**1 < - -> GND  < - ->  Black**
1970 +
1992 1992  (% style="background-color:yellow" %)**4  < - ->  3.3V  < - ->  Blue**
1993 1993  
1994 1994  (% style="background-color:yellow" %)**5 < - ->  RXD  < - ->  White**
... ... @@ -1995,9 +1995,13 @@
1995 1995  
1996 1996  (% style="background-color:yellow" %)**9 < - ->  TXD  < - ->  Green**
1997 1997  
1998 -Use after connection， ground wire（1 < - -> GND  < - ->  Black） for 1s and then pull it out.Then restart the device.
1977 +[[image:image-20220620160241-6.jpeg||height="428" width="571"]]
1999 1999  
1979 +Press reset after connecting the 4boot cable to enter the download mode.
2000 2000  
1981 +[[image:image-20220620160516-7.png||height="435" width="435"]]
1982 +
1983 +
2001 2001  (% _mstmutation="1" %)**Step1**(%%): Install TremoProgrammer  first.
2002 2002  
2003 2003  [[image:image-20220615170542-5.png]]
... ... @@ -2015,7 +2015,7 @@
2015 2015  
2016 2016  (% _istranslated="1" _mstmutation="1" %)**Step4：**(%%)Click Start
2017 2017  
2018 -
2001 +[[image:image-20220620160723-8.png]]
2019 2019  )))
2020 2020  
2021 2021  (% _mstvisible="1" %)
... ... @@ -2141,8 +2141,6 @@
2141 2141  
2142 2142  * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/home/Products_Public_Document/LoRaWAN%20End%20Node/LHT65N%20Temperature%20%26%20Humidity%20Sensor||_msthash="504975" _msttexthash="51420512"]]
2143 2143  
2144 -
2145 -
2146 2146  = (% _msthash="216320" _msttexthash="10002096" %)10. (%%)FCC Warning =
2147 2147  
2148 2148  (% _mstvisible="1" %)
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