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<
From version < 35.1 >
edited by Edwin Chen
on 2022/05/22 23:53
To version < 95.1 >
edited by Edwin Chen
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Summary

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Content
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1 -{{box cssClass="floatinginfobox" title="**Contents**"}}
1 +(% style="text-align:center" %)
2 +[[image:image-20220523115324-1.jpeg||height="317" width="317"]]
3 +
4 +
5 +**LHT65N LoRaWAN Temperature & Humidity Sensor Manual**
6 +
7 +
8 +
9 +
10 +**Table of Contents：**
11 +
2 2  {{toc/}}
3 -{{/box}}
4 4  
5 -= Overview =
6 6  
7 -[[image:LHT65N_10.png||alt="LHT65_Image" height="265" width="265"]]
8 8  
9 9  
10 -The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a(% class="mark" %) **built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% class="mark" %)**Temperature Sensor**(%%)**.**
17 += 1. Introduction =
11 11  
19 +== 1.1 What is LHT65N Temperature & Humidity Sensor ==
20 +
21 +(((
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**(%%)**.**
23 +)))
24 +
25 +(((
12 12  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.
27 +)))
13 13  
29 +(((
14 14  LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 +)))
15 15  
33 +(((
16 16  LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 +)))
17 17  
18 -LHT65N supports (% class="mark" %)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.
37 +(((
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.
39 +)))
19 19  
41 +(((
20 20  *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 +)))
21 21  
45 +== 1.2 Features ==
22 22  
23 -== Features: ==
24 -
25 25  * Wall mountable
26 26  * LoRaWAN v1.0.3 Class A protocol
27 27  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
... ... @@ -34,55 +34,87 @@
34 34  * Tri-color LED to indicate working status
35 35  * Datalog feature
36 36  
37 -== Specification: ==
59 +== 1.3 Specification ==
38 38  
61 +(((
39 39  **Built-in Temperature Sensor:**
63 +)))
40 40  
41 -* Resolution: 0.01 °C
42 -* Accuracy Tolerance : Typ ±0.3 °C
43 -* Long Term Drift: < 0.02 °C/yr
44 -* Operating Range: -40 ~~ 85 °C
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 +)))
45 45  
78 +(((
46 46  **Built-in Humidity Sensor:**
80 +)))
47 47  
48 -* Resolution: 0.04 %RH
49 -* Accuracy Tolerance : Typ ±3 %RH
50 -* Long Term Drift: < 0.02 °C/yr
51 -* Operating Range: 0 ~~ 96 %RH
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 +)))
52 52  
95 +(((
53 53  **External Temperature Sensor:**
97 +)))
54 54  
55 -* Resolution: 0.0625 °C
56 -* ±0.5°C accuracy from -10°C to +85°C
57 -* ±2°C accuracy from -55°C to +125°C
58 -* Operating Range: -55 °C ~~ 125 °C
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 +)))
59 59  
60 -= Connect LHT65N to IoT Server =
112 += 2. Connect LHT65N to IoT Server =
61 61  
62 -== How does LHT65N work? ==
114 +== 2.1 How does LHT65N work? ==
63 63  
116 +(((
64 64  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.
118 +)))
65 65  
120 +(((
66 66  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.
122 +)))
67 67  
124 +== 2.2 How to Activate LHT65N? ==
68 68  
69 -== How to Activate LHT65N? ==
70 -
71 71  The LHT65N has two working modes:
72 72  
73 73  * **Deep Sleep Mode**: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
74 74  * **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. 
75 75  
131 +(((
76 76  The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
133 +)))
77 77  
78 78  [[image:image-20220515123819-1.png||height="379" width="317"]]
79 79  
80 -|**Behavior on ACT**|**Function**|**Action**
81 -|**Pressing ACT between 1s < time < 3s**|Test uplink status|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.
82 -|**Pressing ACT for more than 3s**|Active Device|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.
83 -|**Fast press ACT 5 times**|Deactivate Device|red led will solid on for 5 seconds. This means LHT65N is in Deep Sleep Mode.
137 +[[image:image-20220523153201-19.png||height="180" width="818"]]
84 84  
85 -== Example to join LoRaWAN network ==
139 +== 2.3 Example to join LoRaWAN network ==
86 86  
87 87  (% class="wikigeneratedid" %)
88 88  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.
... ... @@ -93,7 +93,7 @@
93 93  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:
94 94  
95 95  
96 -=== **Step 1**: Create Device n TTN ===
150 +=== 2.3.1 Step 1: Create Device n TTN ===
97 97  
98 98  Create a device in TTN V3 with the OTAA keys from LHT65N.
99 99  
... ... @@ -107,10 +107,8 @@
107 107  
108 108  [[image:image-20220522232916-3.png]]
109 109  
110 -
111 111  [[image:image-20220522232932-4.png]]
112 112  
113 -
114 114  [[image:image-20220522232954-5.png]]
115 115  
116 116  Note: LHT65N use same payload as LHT65.
... ... @@ -123,73 +123,566 @@
123 123  [[image:image-20220522233118-7.png]]
124 124  
125 125  
126 -=== Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
178 +=== 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
127 127  
128 128  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.
129 129  
130 -[[image:image-20220522233300-8.png]]
182 +[[image:image-20220522233300-8.png||height="219" width="722"]]
131 131  
132 132  
133 -== Uplink Payload: ==
185 +== 2.4 Uplink Payload ==
134 134  
135 -The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
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.
136 136  
137 -After each uplink, the (% class="mark" %)BLUE LED(%%) will blink once.
189 +After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
138 138  
191 +(% border="1" style="background-color:#ffffcc; color:green; width:426px" %)
192 +|(% style="width:97px" %)(((
193 +**Size(bytes)**
194 +)))|(% style="width:39px" %)(((
195 +**2**
196 +)))|(% style="width:100px" %)(((
197 +**2**
198 +)))|(% style="width:77px" %)(((
199 +**2**
200 +)))|(% style="width:47px" %)(((
201 +**1**
202 +)))|(% style="width:51px" %)(((
203 +**4**
204 +)))
205 +|(% style="width:97px" %)(((
206 +**Value**
207 +)))|(% style="width:39px" %)(((
208 +[[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]]
209 +)))|(% style="width:100px" %)(((
210 +(((
211 +[[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
212 +)))
213 +)))|(% style="width:77px" %)(((
214 +(((
215 +[[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]]
216 +)))
139 139  
140 -(% style="width:572px" %)
141 -|(% style="width:106px" %)**Size(bytes)**|(% style="width:71px" %)**2**|(% style="width:128px" %)**2**|(% style="width:103px" %)**2**|(% style="width:72px" %)**1**|(% style="width:89px" %)**4**
142 -|(% style="width:106px" %)**Value**|(% style="width:71px" %)[[BAT>>path:#Battery]]|(% style="width:128px" %)(((
143 -[[Built-In>>path:#SHT20_Temperature]]
218 +(((
219 +[[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]]
220 +)))
221 +)))|(% style="width:47px" %)(((
222 +[[Ext>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.5Ext23]] #
223 +)))|(% style="width:51px" %)(((
224 +[[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]]
225 +)))
144 144  
145 -[[Temperature>>path:#SHT20_Temperature]]
146 -)))|(% style="width:103px" %)(((
147 -[[Built-in>>path:#SHT20_Humidity]]
148 -
149 -[[Humidity>>path:#SHT20_Humidity]]
150 -)))|(% style="width:72px" %)[[Ext>>path:#Extension_Sensor]] #|(% style="width:89px" %)[[Ext value>>path:#Extension_sensor_value]]
151 -
152 152  * The First 6 bytes: has fix meanings for every LHT65N.
153 153  * The 7th byte (EXT #): defines the external sensor model.
154 154  * 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.)
155 155  
231 +=== 2.4.1 Decoder in TTN V3 ===
156 156  
157 -=== Decoder in TTN V3 ===
158 -
159 159  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.
160 160  
161 161  Below is the position to put the decoder and LHT65N decoder can be download from here:
162 162  
237 +[[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
163 163  
164 -[[image:image-20220522234118-10.png]]
239 +[[image:image-20220522234118-10.png||height="353" width="729"]]
165 165  
241 +=== 2.4.2 BAT-Battery Info ===
166 166  
167 -== LED Indicator ==
243 +These two bytes of BAT include the battery state and the actually voltage
168 168  
245 +[[image:image-20220523152839-18.png]]
246 +
247 +[[image:image-20220522235639-1.png||height="139" width="727"]]
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 +
254 +=== 2.4.3 Built-in Temperature ===
255 +
256 +[[image:image-20220522235639-2.png||height="138" width="722"]]
257 +
258 +* Temperature:  0x0ABB/100=27.47℃
259 +
260 +[[image:image-20220522235639-3.png]]
261 +
262 +* Temperature:  (0xF5C6-65536)/100=-26.18℃
263 +
264 +=== 2.4.4 Built-in Humidity ===
265 +
266 +[[image:image-20220522235639-4.png||height="138" width="722"]]
267 +
268 +* Humidity:    0x025C/10=60.4%
269 +
270 +=== 2.4.5 Ext # ===
271 +
272 +Bytes for External Sensor:
273 +
274 +[[image:image-20220523152822-17.png]]
275 +
276 +=== 2.4.6 Ext value ===
277 +
278 +==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
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 +
290 +(((
291 +The last 2 bytes of data are meaningless
292 +)))
293 +
294 +(((
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℃
296 +)))
297 +
298 +
299 +==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
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 +
303 +(% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
304 +|(% style="width:96px" %)(((
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" %)(((
318 +**Value**
319 +)))|(% style="width:71px" %)(((
320 +[[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]]
321 +)))|(% style="width:99px" %)(((
322 +(((
323 +[[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]]
324 +)))
325 +
326 +(((
327 +[[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]]
328 +)))
329 +)))|(% style="width:132px" %)(((
330 +(((
331 +BAT Status &
332 +)))
333 +
334 +(((
335 +[[Built-in 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]]
336 +)))
337 +)))|(% style="width:54px" %)(((
338 +Status & Ext
339 +)))|(% style="width:64px" %)(((
340 +(((
341 +[[Unix 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]]
342 +)))
343 +)))
344 +
345 +* **Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)**
346 +
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" %)(((
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)
359 +)))|(% style="width:134px" %)(((
360 +[[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]]
361 +
362 +
363 +)))
364 +
365 +* **Status & Ext Byte**
366 +
367 +[[image:image-20220523152434-16.png]]
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 +
373 +== 2.5 Show data on Datacake ==
374 +
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 +
377 +(((
378 +**Step 1**: Be sure that your device is programmed and properly connected to the LoRaWAN network.
379 +)))
380 +
381 +(((
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.
383 +)))
384 +
385 +(((
386 +Add Datacake:
387 +)))
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 +
400 +[[image:image-20220523000825-10.png||height="413" width="728"]]
401 +
402 +== 2.6 Datalog Feature ==
403 +
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.
405 +
406 +=== 2.6.1 Ways to get datalog via LoRaWAN ===
407 +
408 +There are two methods:
409 +
410 +1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
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.
412 +
413 +=== 2.6.2 Unix TimeStamp ===
414 +
415 +LHT65N uses Unix TimeStamp format based on
416 +
417 +[[image:image-20220523001219-11.png||height="97" width="627"]]
418 +
419 +
420 +(((
421 +User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
422 +)))
423 +
424 +(((
425 +Below is the converter example
426 +)))
427 +
428 +[[image:image-20220523001219-12.png||height="298" width="720"]]
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 +
432 +=== 2.6.3 Set Device Time ===
433 +
434 +(((
435 +There are two ways to set device’s time:
436 +)))
437 +
438 +(((
439 +**~1. Through LoRaWAN MAC Command (Default settings)**
440 +)))
441 +
442 +(((
443 +User need to set SYNCMOD=1 to enable sync time via MAC command.
444 +)))
445 +
446 +(((
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).
448 +)))
449 +
450 +(((
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.
452 +)))
453 +
454 +(((
455 +
456 +)))
457 +
458 +(((
459 +**2. Manually Set Time**
460 +)))
461 +
462 +(((
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.
464 +)))
465 +
466 +=== 2.6.4 Poll sensor value ===
467 +
468 +User can poll sensor value based on timestamps from the server. Below is the downlink command.
469 +
470 +[[image:image-20220523152302-15.png]]
471 +
472 +(((
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.
474 +)))
475 +
476 +(((
477 +For example, downlink command (% style="display:none" %) (%%)**31 5FC5F350 5FC6 0160 05**
478 +)))
479 +
480 +(((
481 +Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
482 +)))
483 +
484 +(((
485 +Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
486 +)))
487 +
488 +
489 +=== 2.6.5 Datalog Uplink payload ===
490 +
491 +The Datalog poll reply uplink will use below payload format.
492 +
493 +(((
494 +**Retrieval data payload**
495 +)))
496 +
497 +(% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
498 +|(% style="width:93px" %)(((
499 +(((
500 +**Size(bytes)**
501 +)))
502 +)))|(% style="width:71px" %)(((
503 +(((
504 +**2**
505 +)))
506 +)))|(% style="width:102px" %)(((
507 +(((
508 +**2**
509 +)))
510 +)))|(% style="width:86px" %)(((
511 +(((
512 +**2**
513 +)))
514 +)))|(% style="width:86px" %)(((
515 +(((
516 +**1**
517 +)))
518 +)))|(% style="width:48px" %)(((
519 +(((
520 +**4**
521 +)))
522 +)))
523 +|(% style="width:93px" %)(((
524 +(((
525 +**Value**
526 +)))
527 +)))|(% style="width:71px" %)(((
528 +(((
529 +[[External sensor data>>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]]
530 +)))
531 +)))|(% style="width:102px" %)(((
532 +(((
533 +(((
534 +[[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]]
535 +)))
536 +)))
537 +
538 +(((
539 +(((
540 +[[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]]
541 +)))
542 +)))
543 +)))|(% style="width:86px" %)(((
544 +(((
545 +(((
546 +[[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]]
547 +)))
548 +)))
549 +
550 +(((
551 +(((
552 +[[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]]
553 +)))
554 +)))
555 +)))|(% style="width:86px" %)(((
556 +(((
557 +[[Poll message flag & Ext>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.6.4DatalogUplinkpayload]]
558 +)))
559 +)))|(% style="width:48px" %)(((
560 +(((
561 +(((
562 +[[Unix 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/#H2.6.1UnixTimeStamp]]
563 +)))
564 +)))
565 +
566 +(((
567 +(((
568 +
569 +)))
570 +)))
571 +)))
572 +
573 +**Poll message flag & Ext**
574 +
575 +[[image:image-20220523152208-14.png]]
576 +
577 +(((
578 +(((
579 +Poll Message Flag: 1: This message is a poll message reply.
580 +)))
581 +)))
582 +
583 +* (((
584 +(((
585 +Poll Message Flag is set to 1.
586 +)))
587 +)))
588 +* (((
589 +(((
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 +)))
592 +)))
593 +
594 +(((
595 +(((
596 +For example, in US915 band, the max payload for different DR is:
597 +)))
598 +)))
599 +
600 +(((
601 +(((
602 +a) DR0: max is 11 bytes so one entry of data
603 +)))
604 +)))
605 +
606 +(((
607 +(((
608 +b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
609 +)))
610 +)))
611 +
612 +(((
613 +(((
614 +c) DR2: total payload includes 11 entries of data
615 +)))
616 +)))
617 +
618 +(((
619 +(((
620 +d) DR3: total payload includes 22 entries of data.
621 +)))
622 +)))
623 +
624 +(((
625 +(((
626 +If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
627 +)))
628 +)))
629 +
630 +
631 +**Example:**
632 +
633 +If LHT65N has below data inside Flash:
634 +
635 +[[image:image-20220523144455-1.png||height="335" width="735"]]
636 +
637 +(((
638 +If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
639 +)))
640 +
641 +(((
642 + Where : Start time: 60065F97 = time 21/1/19 04:27:03
643 +)))
644 +
645 +(((
646 + Stop time 60066DA7= time 21/1/19 05:27:03
647 +)))
648 +
649 +(((
650 +
651 +)))
652 +
653 +(((
654 +LHT65N will uplink this payload.
655 +)))
656 +
657 +[[image:image-20220523001219-13.png||height="421" width="727"]]
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 +
675 +== 2.7 Alarm Mode ==
676 +
677 +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.
678 +
679 +(((
680 +(% 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.
681 +)))
682 +
683 +(((
684 +**AT Commands for Alarm mode:**
685 +)))
686 +
687 +(% class="box infomessage" %)
688 +(((
689 +(((
690 +**AT+WMOD=1**: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
691 +)))
692 +)))
693 +
694 +(% class="box infomessage" %)
695 +(((
696 +(((
697 +**AT+CITEMP=1**: The interval to check the temperature for Alarm. (Unit: minute)
698 +)))
699 +)))
700 +
701 +== 2.8 LED Indicator ==
702 +
703 +(((
169 169  The LHT65N has a triple color LED which for easy shows different stage.
705 +)))
170 170  
707 +(((
171 171  While pressing ACT button, the LED will work as per LED status with ACT button.
709 +)))
172 172  
711 +(((
173 173  In a normal working state:
713 +)))
174 174  
175 -* For each uplink, the BLUE LED or RED LED will blink once.
176 -* BLUE LED when an external sensor is connected
177 -* RED LED when an external sensor is not connected
178 -* For each success downlink, the PURPLE LED will blink once
715 +* (((
716 +For each uplink, the BLUE LED or RED LED will blink once.
717 +)))
718 +* (((
719 +BLUE LED when an external sensor is connected
720 +)))
721 +* (((
722 +RED LED when an external sensor is not connected
723 +)))
724 +* (((
725 +For each success downlink, the PURPLE LED will blink once
726 +)))
179 179  
180 180  ----
181 181  
182 -== Installation ==
730 +== 2.9 Installation ==
183 183  
184 -[[image:image-20220516231650-1.png||height="632" width="620"]]
732 +[[image:image-20220516231650-1.png||height="436" width="428"]]
185 185  
734 += 3. Sensors & Accessories =
186 186  
736 +== 3.1 E3 Temperature Probe ==
187 187  
188 -
189 -= Sensors & Accessories =
190 -
191 -== E3 Temperature Probe ==
192 -
193 193  [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
194 194  
195 195  
... ... @@ -201,72 +201,387 @@
201 201  * Operating Range: -40 ~~ 125 °C
202 202  * -55°C to 125°C
203 203  * Working voltage 2.35v ~~ 5v
204 -
205 205  
206 -= Battery & How to replace =
750 += 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
207 207  
208 -== Battery Type ==
752 +(((
753 +Use can configure LHT65N via AT Command or LoRaWAN Downlink.
754 +)))
209 209  
756 +* (((
757 +AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
758 +)))
759 +* (((
760 +LoRaWAN Downlink instruction for different platforms:
761 +)))
762 +
763 +(((
764 +[[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]]
765 +)))
766 +
767 +(((
768 +There are two kinds of commands to configure LHT65N, they are:
769 +)))
770 +
771 +(((
772 +(% style="color:#4f81bd" %)* **General Commands**.
773 +)))
774 +
775 +(((
776 +These commands are to configure:
777 +)))
778 +
779 +* (((
780 +General system settings like: uplink interval.
781 +)))
782 +* (((
783 +LoRaWAN protocol & radio-related commands.
784 +)))
785 +
786 +(((
787 +They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki:
788 +)))
789 +
790 +(((
791 +[[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
792 +)))
793 +
794 +(((
795 +(% style="color:#4f81bd" %)* **Commands special design for LHT65N**
796 +)))
797 +
798 +(((
799 +These commands are only valid for LHT65N, as below:
800 +)))
801 +
802 +== 4.1 Set Transmit Interval Time ==
803 +
804 +Feature: Change LoRaWAN End Node Transmit Interval.
805 +
806 +**AT Command: AT+TDC**
807 +
808 +[[image:image-20220523150701-2.png]]
809 +
810 +(((
811 +**Downlink Command: 0x01**
812 +)))
813 +
814 +(((
815 +Format: Command Code (0x01) followed by 3 bytes time value.
816 +)))
817 +
818 +(((
819 +If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
820 +)))
821 +
822 +* (((
823 +**Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
824 +)))
825 +* (((
826 +**Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
827 +)))
828 +
829 +== 4.2 Set External Sensor Mode ==
830 +
831 +Feature: Change External Sensor Mode.
832 +
833 +**AT Command: AT+EXT**
834 +
835 +[[image:image-20220523150759-3.png]]
836 +
837 +(((
838 +**Downlink Command: 0xA2**
839 +)))
840 +
841 +(((
842 +Total bytes: 2 ~~ 5 bytes
843 +)))
844 +
845 +(((
846 +**Example:**
847 +)))
848 +
849 +* (((
850 +0xA201: Set external sensor type to E1
851 +)))
852 +* (((
853 +0xA209: Same as AT+EXT=9
854 +)))
855 +* (((
856 +0xA20702003c,Same as AT+SETCNT=60
857 +)))
858 +
859 +== 4.3 Enable/Disable uplink Temperature probe ID ==
860 +
861 +Feature: If PID is enabled, device will send the temperature probe ID on:
862 +
863 +* First Packet after OTAA Join
864 +* Every 24 hours since the first packet.
865 +
866 +PID is default set to disable (0)
867 +
868 +**AT Command:**
869 +
870 +[[image:image-20220523150928-4.png]]
871 +
872 +**Downlink Command:**
873 +
874 +* 0xA800  **~-~->** AT+PID=0
875 +* 0xA801     **~-~->** AT+PID=1
876 +
877 +== 4.4 Set Password ==
878 +
879 +Feature: Set device password, max 9 digits
880 +
881 +**AT Command: AT+PWORD**
882 +
883 +[[image:image-20220523151052-5.png]]
884 +
885 +(((
886 +**Downlink Command:**
887 +)))
888 +
889 +(((
890 +No downlink command for this feature.
891 +)))
892 +
893 +== 4.5 Quit AT Command ==
894 +
895 +Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
896 +
897 +**AT Command: AT+DISAT**
898 +
899 +[[image:image-20220523151132-6.png]]
900 +
901 +**Downlink Command:**
902 +
903 +No downlink command for this feature.
904 +
905 +== 4.6 Set to sleep mode ==
906 +
907 +Feature: Set device to sleep mode
908 +
909 +**AT Command: AT+SLEEP**
910 +
911 +[[image:image-20220523151218-7.png]]
912 +
913 +**Downlink Command:**
914 +
915 +* There is no downlink command to set to Sleep mode.
916 +
917 +== 4.7 Set system time ==
918 +
919 +Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
920 +
921 +**AT Command:**
922 +
923 +[[image:image-20220523151253-8.png]]
924 +
925 +**Downlink Command:**
926 +
927 +0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
928 +
929 +== 4.8 Set Time Sync Mode ==
930 +
931 +(((
932 +Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
933 +)))
934 +
935 +(((
936 +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.
937 +)))
938 +
939 +(((
940 +**AT Command:**
941 +)))
942 +
943 +[[image:image-20220523151336-9.png]]
944 +
945 +**Downlink Command:**
946 +
947 +0x28 01 ~/~/ Same As AT+SYNCMOD=1
948 +
949 +0x28 00 ~/~/ Same As AT+SYNCMOD=0
950 +
951 +== 4.9 Set Time Sync Interval ==
952 +
953 +Feature: Define System time sync interval. SYNCTDC default value: 10 days.
954 +
955 +**AT Command:**
956 +
957 +[[image:image-20220523151411-10.png]]
958 +
959 +**Downlink Command:**
960 +
961 +0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
962 +
963 +== 4.10 Print data entries base on page. ==
964 +
965 +Feature: Print the sector data from start page to stop page (max is 416 pages).
966 +
967 +**AT Command: AT+PDTA**
968 +
969 +[[image:image-20220523151450-11.png]]
970 +
971 +**Downlink Command:**
972 +
973 +No downlink commands for feature
974 +
975 +== 4.11 Print last few data entries. ==
976 +
977 +Feature: Print the last few data entries
978 +
979 +**AT Command: AT+PLDTA**
980 +
981 +[[image:image-20220523151524-12.png]]
982 +
983 +**Downlink Command:**
984 +
985 +No downlink commands for feature
986 +
987 +== 4.12 Clear Flash Record ==
988 +
989 +Feature: Clear flash storage for data log feature.
990 +
991 +**AT Command: AT+CLRDTA**
992 +
993 +[[image:image-20220523151556-13.png]]
994 +
995 +**Downlink Command: 0xA3**
996 +
997 +* Example: 0xA301 ~/~/Same as AT+CLRDTA
998 +
999 +== 4.13 Auto Send None-ACK messages ==
1000 +
1001 +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.
1002 +
1003 +
1004 +**AT Command: AT+PNACKMD**
1005 +
1006 +The default factory setting is 0
1007 +
1008 +|**Command Example**|**Function**|**Response**
1009 +|AT+PNACKMD=1|Poll None-ACK message|OK
1010 +
1011 +**Downlink Command: 0x34**
1012 +
1013 +* Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1014 +
1015 += 5. Battery & How to replace =
1016 +
1017 +== 5.1 Battery Type ==
1018 +
210 210  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.
211 211  
1021 +(((
212 212  The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
213 213  [[image:image-20220515075034-1.png||height="208" width="644"]]
1024 +)))
214 214  
215 -
1026 +(((
216 216  The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
217 217  
1029 +)))
218 218  
219 -== Replace Battery ==
1031 +== 5.2 Replace Battery ==
220 220  
221 221  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.
222 222  
223 223  [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
224 224  
1037 +== 5.3 Battery Life Analyze ==
225 225  
226 -== Battery Life Analyze ==
227 -
1039 +(((
228 228  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:
229 229  https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
1042 +)))
230 230  
1044 += 6. Order Info =
231 231  
232 -= Order Info =
1046 +(((
1047 +Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1048 +)))
233 233  
234 -Part Number: (% class="mark" %)**LHT65N-XX**
1050 +(((
1051 +(% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1052 +)))
235 235  
236 -**XX**: The default frequency band
1054 +* (((
1055 +(% style="color:#4f81bd" %)** AS923**(%%): LoRaWAN AS923 band
1056 +)))
1057 +* (((
1058 +(% style="color:#4f81bd" %)** AU915**(%%): LoRaWAN AU915 band
1059 +)))
1060 +* (((
1061 +(% style="color:#4f81bd" %)** EU433**(%%): LoRaWAN EU433 band
1062 +)))
1063 +* (((
1064 +(% style="color:#4f81bd" %)** EU868**(%%): LoRaWAN EU868 band
1065 +)))
1066 +* (((
1067 +(% style="color:#4f81bd" %)** KR920**(%%): LoRaWAN KR920 band
1068 +)))
1069 +* (((
1070 +(% style="color:#4f81bd" %)** US915**(%%): LoRaWAN US915 band
1071 +)))
1072 +* (((
1073 +(% style="color:#4f81bd" %)** IN865**(%%): LoRaWAN IN865 band
1074 +)))
1075 +* (((
1076 +(% style="color:#4f81bd" %)** CN470**(%%): LoRaWAN CN470 band
1077 +)))
237 237  
238 -* **AS923**: LoRaWAN AS923 band
239 -* **AU915**: LoRaWAN AU915 band
240 -* **EU433**: LoRaWAN EU433 band
241 -* **EU868**: LoRaWAN EU868 band
242 -* **KR920**: LoRaWAN KR920 band
243 -* **US915**: LoRaWAN US915 band
244 -* **IN865**: LoRaWAN IN865 band
245 -* **CN470**: LoRaWAN CN470 band
1079 +(((
1080 +(% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1081 +)))
246 246  
247 -**YY**: Sensor Accessories
1083 +* (((
1084 +(% style="color:#4f81bd" %)**E3**(%%): External Temperature Probe
1085 +)))
248 248  
249 -* **E3**: External Temperature Probe
1087 += 7. Packing Info =
250 250  
251 -= Packing Info =
252 -
1089 +(((
253 253  **Package Includes**:
1091 +)))
254 254  
255 -* LHT65N Temperature & Humidity Sensor x 1
256 -* Program cable x 1
257 -* Optional external sensor
1093 +* (((
1094 +LHT65N Temperature & Humidity Sensor x 1
1095 +)))
1096 +* (((
1097 +Program cable x 1
1098 +)))
1099 +* (((
1100 +Optional external sensor
1101 +)))
258 258  
1103 +(((
259 259  **Dimension and weight**:
1105 +)))
260 260  
261 -* Device Size:  13.5 x 7 x 3 cm
262 -* Device Weight: 105g
263 -* Package Size / pcs : 14.5 x 8 x 5 cm
264 -* Weight / pcs : 170g
1107 +* (((
1108 +Device Size:  13.5 x 7 x 3 cm
1109 +)))
1110 +* (((
1111 +Device Weight: 105g
1112 +)))
1113 +* (((
1114 +Package Size / pcs : 14.5 x 8 x 5 cm
1115 +)))
1116 +* (((
1117 +Weight / pcs : 170g
1118 +)))
265 265  
266 -= FCC Warning =
1120 += 8. FCC Warning =
267 267  
1122 +(((
268 268  This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1124 +)))
269 269  
270 -(1) This device may not cause harmful interference, and
1126 +(((
1127 +(1) This device may not cause harmful interference；
1128 +)))
271 271  
272 -(2) this device must accept any interference received, including interference that may cause undesired operation
1130 +(((
1131 +(2) this device must accept any interference received, including interference that may cause undesired operation.
1132 +)))
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