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Last modified by Xiaoling on 2023/05/26 14:19
From version 166.4
edited by Xiaoling
on 2023/05/26 14:19
Change comment: There is no comment for this version
To version 63.1
edited by Herong Lu
on 2022/06/02 17:23
Change comment: There is no comment for this version

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Title
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1 -LA66 LoRaWAN Shield User Manual
1 +LA66 LoRaWAN Module
Author
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1 -XWiki.Xiaoling
1 +XWiki.Lu
Content
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1 -
2 -
3 -**Table of Contents:**
4 -
1 +{{box cssClass="floatinginfobox" title="**Contents**"}}
5 5  {{toc/}}
3 +{{/box}}
6 6  
5 += LA66 LoRaWAN Module =
7 7  
7 +== What is LA66 LoRaWAN Module ==
8 8  
9 +**Dragino LA66** is a small wireless LoRaWAN module that offers a very compelling mix of long-range, low power consumption, and secure data transmission. It is designed to facilitate developers to quickly deploy industrial-level LoRa and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to program, create and connect your things everywhere.
9 9  
10 -= 1.  LA66 LoRaWAN Shield =
11 +**LA66 **is a ready-to-use module which includes the LoRaWAN v1.0.4 protocol. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
11 11  
12 -== 1.1  Overview ==
13 +**Each LA66 **module includes a world unique OTAA key for LoRaWAN registration.
13 13  
14 14  
15 -(((
16 -[[image:image-20220715000826-2.png||height="145" width="220"]]
17 -)))
18 18  
19 -(((
20 -
21 -)))
17 +== Specification ==
22 22  
23 -(((
24 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%) is the Arduino shield base on LA66. Users can use LA66 LoRaWAN Shield to rapidly add LoRaWAN or peer-to-peer LoRa wireless function to  Arduino projects.
25 -)))
19 +[[image:image-20220517072526-1.png]]
26 26  
27 -(((
28 -(((
29 -(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.3 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely.  This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
30 -)))
31 -)))
21 +Input Power Range: 1.8v ~~ 3.7v
32 32  
33 -(((
34 -(((
35 -Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
36 -)))
37 -)))
23 +Power Consumption: < 4uA.
38 38  
39 -(((
40 -(((
41 -Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application.
42 -)))
43 -)))
25 +Frequency Range: 150 MHz ~~ 960 MHz
44 44  
45 -(((
46 -(((
47 -LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
48 -)))
49 -)))
27 +Maximum Power +22 dBm constant RF output
50 50  
29 +High sensitivity: -148 dBm
51 51  
52 -== 1.2  Features ==
31 +Temperature:
53 53  
33 +* Storage: -55 ~~ +125℃
34 +* Operating: -40 ~~ +85℃
54 54  
55 -* Arduino Shield base on LA66 LoRaWAN module
56 -* Support LoRaWAN v1.0.3 protocol
57 -* Support peer-to-peer protocol
58 -* TCXO crystal to ensure RF performance on low temperature
59 -* SMA connector
60 -* Available in different frequency LoRaWAN frequency bands.
61 -* World-wide unique OTAA keys.
62 -* AT Command via UART-TTL interface
63 -* Firmware upgradable via UART interface
64 -* Ultra-long RF range
36 +Humidity:
65 65  
38 +* Storage: 5 ~~ 95% (Non-Condensing)
39 +* Operating: 10 ~~ 95% (Non-Condensing)
66 66  
67 -== 1.3  Specification ==
41 +LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
68 68  
43 +LoRa Rx current: <9 mA
69 69  
70 -* CPU: 32-bit 48 MHz
71 -* Flash: 256KB
72 -* RAM: 64KB
73 -* Input Power Range: 1.8v ~~ 3.7v
74 -* Power Consumption: < 4uA.
75 -* Frequency Range: 150 MHz ~~ 960 MHz
76 -* Maximum Power +22 dBm constant RF output
77 -* High sensitivity: -148 dBm
78 -* Temperature:
79 -** Storage: -55 ~~ +125℃
80 -** Operating: -40 ~~ +85℃
81 -* Humidity:
82 -** Storage: 5 ~~ 95% (Non-Condensing)
83 -** Operating: 10 ~~ 95% (Non-Condensing)
84 -* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
85 -* LoRa Rx current: <9 mA
86 -* I/O Voltage: 3.3v
45 +I/O Voltage: 3.3v
87 87  
88 88  
89 -== 1.4  Pin Mapping & LED ==
48 +== AT Command ==
90 90  
50 +AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
91 91  
92 -[[image:image-20220817085048-1.png||height="533" width="734"]]
93 93  
53 +== Pin Mapping ==
94 94  
55 +[[image:image-20220523101537-1.png]]
95 95  
96 -~1. The LED lights up red when there is an upstream data packet
57 +== Land Pattern ==
97 97  
98 -2. When the network is successfully connected, the green light will be on for 5 seconds
59 +[[image:image-20220517072821-2.png]]
99 99  
100 -3. Purple light on when receiving downlink data packets
101 101  
62 +== Part Number ==
102 102  
103 -[[image:image-20220820112305-1.png||height="515" width="749"]]
64 +Part Number: **LA66-XXX**
104 104  
66 +**XX**: The default frequency band
105 105  
106 -== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
68 +* **AS923**: LoRaWAN AS923 band
69 +* **AU915**: LoRaWAN AU915 band
70 +* **EU433**: LoRaWAN EU433 band
71 +* **EU868**: LoRaWAN EU868 band
72 +* **KR920**: LoRaWAN KR920 band
73 +* **US915**: LoRaWAN US915 band
74 +* **IN865**: LoRaWAN IN865 band
75 +* **CN470**: LoRaWAN CN470 band
107 107  
77 += LA66 LoRaWAN Shield =
108 108  
109 -(% style="color:blue" %)**Show connection diagram：**
79 +LA66 LoRaWAN Shield is the Arduino Breakout PCB to fast test the features of LA66 module and turn Arduino to support LoRaWAN.
110 110  
81 +== Pin Mapping & LED ==
111 111  
112 -[[image:image-20220723170210-2.png||height="908" width="681"]]
83 +== Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
113 113  
85 +== Example: Join TTN network and send an uplink message, get downlink message. ==
114 114  
87 +== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
115 115  
116 -(% style="color:blue" %)**1.  open Arduino IDE**
89 +== Upgrade Firmware of LA66 LoRaWAN Shield ==
117 117  
91 +=== what needs to be used ===
118 118  
119 -[[image:image-20220723170545-4.png]]
93 +1.LA66 LoRaWAN Shield that needs to be upgraded
120 120  
95 +2.Arduino
121 121  
97 +3.USB TO TTL
122 122  
123 -(% style="color:blue" %)**2.  Open project**
99 +[[image:image-20220602100052-2.png]]
124 124  
101 +=== Wiring Schematic ===
125 125  
126 -LA66-LoRaWAN-shield-AT-command-via-Arduino-UNO source code link: [[https:~~/~~/www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0 >>https://www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0]]
103 +[[image:image-20220602101311-3.png]]
127 127  
128 -[[image:image-20220726135239-1.png]]
105 +LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
129 129  
107 +GND  >>>>>>>>>>>>GND
130 130  
109 +TXD  >>>>>>>>>>>>TXD
131 131  
132 -(% style="color:blue" %)**3.  Click the button marked 1 in the figure to compile, and after the compilation is complete, click the button marked 2 in the figure to upload**
111 +RXD  >>>>>>>>>>>>RXD
133 133  
113 +JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
134 134  
135 -[[image:image-20220726135356-2.png]]
115 +Connect to the PC after connecting the wires
136 136  
117 +[[image:image-20220602102240-4.png]]
137 137  
119 +=== Upgrade steps ===
138 138  
139 -(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
121 +==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
140 140  
123 +[[image:image-20220602102824-5.png]]
141 141  
142 -[[image:image-20220723172235-7.png||height="480" width="1027"]]
125 +==== Press the RST switch on the LA66 LoRaWAN Shield once ====
143 143  
127 +[[image:image-20220602104701-12.png]]
144 144  
145 -== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
129 +==== Open the upgrade application software ====
146 146  
131 +Software download link:  [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/>>https://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/]]
147 147  
148 -(% style="color:blue" %)**1.  Open project**
149 -
150 -
151 -Join-TTN-network source code link: [[https:~~/~~/www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0 >>https://www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0]]
152 -
153 -
154 -[[image:image-20220723172502-8.png]]
155 -
156 -
157 -
158 -(% style="color:blue" %)**2.  Same steps as 1.5,after opening the serial port monitoring, it will automatically connect to the network and send packets**
159 -
160 -
161 -[[image:image-20220723172938-9.png||height="652" width="1050"]]
162 -
163 -
164 -== 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED. ==
165 -
166 -
167 -(% style="color:blue" %)**1.  Open project**
168 -
169 -
170 -Log-Temperature-Sensor-and-send-data-to-TTN source code link: [[https:~~/~~/www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0>>https://www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0]]
171 -
172 -
173 -[[image:image-20220723173341-10.png||height="581" width="1014"]]
174 -
175 -
176 -
177 -(% style="color:blue" %)**2.  Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets**
178 -
179 -
180 -[[image:image-20220723173950-11.png||height="665" width="1012"]]
181 -
182 -
183 -
184 -
185 -
186 -(% style="color:blue" %)**3.  Integration into Node-red via TTNV3**
187 -
188 -
189 -For the usage of Node-RED, please refer to: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Node-RED/>>http://wiki.dragino.com/xwiki/bin/view/Main/Node-RED/]]
190 -
191 -
192 -[[image:image-20220723175700-12.png||height="602" width="995"]]
193 -
194 -
195 -== 1.8  Example: How to join helium ==
196 -
197 -
198 -(% style="color:blue" %)**1.  Create a new device.**
199 -
200 -
201 -[[image:image-20220907165500-1.png||height="464" width="940"]]
202 -
203 -
204 -
205 -(% style="color:blue" %)**2.  Save the device after filling in the necessary information.**
206 -
207 -
208 -[[image:image-20220907165837-2.png||height="375" width="809"]]
209 -
210 -
211 -
212 -(% style="color:blue" %)**3.  Use AT commands.**
213 -
214 -
215 -[[image:image-20220602100052-2.png||height="385" width="600"]]
216 -
217 -
218 -
219 -(% style="color:#0000ff" %)**4.  Use command AT+CFG to get device configuration**
220 -
221 -
222 -[[image:image-20220907170308-3.png||height="556" width="617"]]
223 -
224 -
225 -
226 -(% style="color:blue" %)**5.  Network successfully.**
227 -
228 -
229 -[[image:image-20220907170436-4.png]]
230 -
231 -
232 -
233 -(% style="color:blue" %)**6.  Send uplink using command**
234 -
235 -
236 -[[image:image-20220912084334-1.png]]
237 -
238 -
239 -[[image:image-20220912084412-3.png]]
240 -
241 -
242 -
243 -[[image:image-20220907170744-6.png||height="242" width="798"]]
244 -
245 -
246 -== 1.9  Upgrade Firmware of LA66 LoRaWAN Shield ==
247 -
248 -=== 1.9.1  Items needed for update ===
249 -
250 -
251 -1. LA66 LoRaWAN Shield
252 -1. Arduino
253 -1. USB TO TTL Adapter
254 -
255 -[[image:image-20220602100052-2.png||height="385" width="600"]]
256 -
257 -
258 -=== 1.9.2  Connection ===
259 -
260 -
261 -[[image:image-20220602101311-3.png||height="276" width="600"]]
262 -
263 -
264 -(((
265 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
266 -)))
267 -
268 -(((
269 -(% style="background-color:yellow" %)**GND  <-> GND
270 -TXD  <->  TXD
271 -RXD  <->  RXD**
272 -)))
273 -
274 -
275 -Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)
276 -
277 -Connect USB TTL Adapter to PC after connecting the wires
278 -
279 -
280 -[[image:image-20220602102240-4.png||height="304" width="600"]]
281 -
282 -
283 -=== 1.9.3  Upgrade steps ===
284 -
285 -
286 -==== (% style="color:blue" %)**1.  Switch SW1 to put in ISP position**(%%) ====
287 -
288 -
289 -[[image:image-20220602102824-5.png||height="306" width="600"]]
290 -
291 -
292 -
293 -==== (% style="color:blue" %)**2.  Press the RST switch once**(%%) ====
294 -
295 -
296 -[[image:image-20220817085447-1.png]]
297 -
298 -
299 -
300 -==== (% style="color:blue" %)**3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade**(%%) ====
301 -
302 -
303 -(((
304 -(% style="color:blue" %)**1.  Software download link:  **(%%)**[[https:~~/~~/www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0>>https://www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0]]**
305 -)))
306 -
307 -
308 308  [[image:image-20220602103227-6.png]]
309 309  
310 -
311 311  [[image:image-20220602103357-7.png]]
312 312  
137 +===== Select the COM port corresponding to USB TTL =====
313 313  
314 -
315 -(% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %)
316 -(% style="color:blue" %)**2.  Select the COM port corresponding to USB TTL**
317 -
318 -
319 319  [[image:image-20220602103844-8.png]]
320 320  
141 +===== Select the bin file to burn =====
321 321  
143 +[[image:image-20220602104144-9.png]]
322 322  
323 -(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
324 -(% style="color:blue" %)**3.  Select the bin file to burn**
145 +[[image:image-20220602104251-10.png]]
325 325  
147 +[[image:image-20220602104402-11.png]]
326 326  
327 -[[image:image-20220602104144-9.png]]
149 +===== Click to start the download =====
328 328  
151 +[[image:image-20220602104923-13.png]]
329 329  
330 -[[image:image-20220602104251-10.png]]
153 +===== The following figure appears to prove that the burning is in progress =====
331 331  
155 +[[image:image-20220602104948-14.png]]
332 332  
333 -[[image:image-20220602104402-11.png]]
157 +===== The following picture appears to prove that the burning is successful =====
334 334  
159 +[[image:image-20220602105251-15.png]]
335 335  
161 += LA66 USB LoRaWAN Adapter =
336 336  
337 -(% class="wikigeneratedid" id="HClicktostartthedownload" %)
338 -(% style="color:blue" %)**4.  Click to start the download**
163 +LA66 USB LoRaWAN Adapter is the USB Adapter for LA66, it combines a USB TTL Chip and LA66 module which can easy to test the LoRaWAN feature by using PC or embedded device which has USB Interface.
339 339  
165 +Before use, please make sure that the computer has installed the CP2102 driver
340 340  
341 -[[image:image-20220602104923-13.png]]
167 +== Pin Mapping & LED ==
342 342  
169 +== Example Send & Get Messages via LoRaWAN in PC ==
343 343  
171 +Connect the LA66 LoRa Shield to the PC
344 344  
345 -(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
346 -(% style="color:blue" %)**5.  Check update process**
173 +[[image:image-20220602171217-1.png||height="615" width="915"]]
347 347  
175 +Open the serial port tool
348 348  
349 -[[image:image-20220602104948-14.png]]
177 +[[image:image-20220602161617-8.png]]
350 350  
179 +[[image:image-20220602161718-9.png||height="529" width="927"]]
351 351  
181 +Press the reset switch RST on the LA66 LoRa Shield.
352 352  
353 -(% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %)
354 -(% style="color:blue" %)**The following picture shows that the burning is successful**
183 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
355 355  
185 +[[image:image-20220602161935-10.png]]
356 356  
357 -[[image:image-20220602105251-15.png]]
187 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
358 358  
189 +example: AT+SENDB=01,02,8,05820802581ea0a5
359 359  
360 -= 2.  FAQ =
191 +[[image:image-20220602162157-11.png]]
361 361  
362 -== 2.1  How to Compile Source Code for LA66? ==
193 +Check to see if TTN received the message
363 363  
195 +[[image:image-20220602162331-12.png||height="547" width="1044"]]
364 364  
365 -Compile and Upload Code to ASR6601 Platform ：[[Instruction>>Main.User Manual for LoRaWAN End Nodes.LA66 LoRaWAN Module.Compile and Upload Code to ASR6601 Platform.WebHome]]
197 +== Example Send & Get Messages via LoRaWAN in RPi ==
366 366  
199 +Connect the LA66 LoRa Shield to the RPI
367 367  
368 -== 2.2  Where to find Peer-to-Peer firmware of LA66? ==
201 +[[image:image-20220602171233-2.png||height="592" width="881"]]
369 369  
203 +Log in to the RPI's terminal and connect to the serial port
370 370  
371 -Instruction for LA66 Peer to Peer firmware :[[ Instruction >>doc:.Instruction for LA66 Peer to Peer firmware.WebHome]]
205 +[[image:image-20220602153146-3.png]]
372 372  
207 +Press the reset switch RST on the LA66 LoRa Shield.
208 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
373 373  
374 -= 3.  Order Info =
210 +[[image:image-20220602154928-5.png]]
375 375  
212 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
376 376  
377 -**Part Number:**   (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%)
214 +example: AT+SENDB=01,02,8,05820802581ea0a5
378 378  
379 -(% style="color:blue" %)**XXX**(%%): The default frequency band
216 +[[image:image-20220602160339-6.png]]
380 380  
381 -* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
382 -* (% style="color:red" %)**AU915**(%%):  LoRaWAN AU915 band
383 -* (% style="color:red" %)**EU433**(%%):  LoRaWAN EU433 band
384 -* (% style="color:red" %)**EU868**(%%):  LoRaWAN EU868 band
385 -* (% style="color:red" %)**KR920**(%%):  LoRaWAN KR920 band
386 -* (% style="color:red" %)**US915**(%%):  LoRaWAN US915 band
387 -* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
388 -* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
389 -* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
218 +Check to see if TTN received the message
390 390  
220 +[[image:image-20220602160627-7.png||height="468" width="1013"]]
391 391  
222 +=== Install Minicom ===
392 392  
393 -= 4.  Reference =
224 +Enter the following command in the RPI terminal
394 394  
226 +apt update
395 395  
396 -* Hardware Design File for LA66 LoRaWAN Shield : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
228 +[[image:image-20220602143155-1.png]]
397 397  
230 +apt install minicom
398 398  
232 +[[image:image-20220602143744-2.png]]
399 399  
400 -= 5.  FCC Statement =
234 +=== Send PC's CPU/RAM usage to TTN via script. ===
401 401  
236 +==== Take python as an example： ====
402 402  
403 -(% style="color:red" %)**FCC Caution:**
238 +===== Preconditions: =====
404 404  
405 -Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
240 +1.LA66 USB LoRaWAN Adapter works fine
406 406  
407 -This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
242 +2.LA66 USB LoRaWAN Adapter  is registered with TTN
408 408  
244 +===== Steps for usage =====
409 409  
410 -(% style="color:red" %)**IMPORTANT NOTE: **
246 +1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
411 411  
412 -(% style="color:red" %)**Note:**(%%) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
248 +2.Run the script and see the TTN
413 413  
414 -—Reorient or relocate the receiving antenna.
250 +[[image:image-20220602115852-3.png]]
415 415  
416 -—Increase the separation between the equipment and receiver.
417 417  
418 -—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
419 419  
420 -—Consult the dealer or an experienced radio/TV technician for help.
254 +== Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
421 421  
422 422  
423 -(% style="color:red" %)**FCC Radiation Exposure Statement: **
257 +== Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
424 424  
425 -This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. 
426 -
427 427  
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