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Last modified by Xiaoling on 2023/05/26 14:19
From version 166.2
edited by Xiaoling
on 2022/11/14 11:41
Change comment: There is no comment for this version
To version 65.1
edited by Edwin Chen
on 2022/07/02 23:30
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.Edwin
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 +(% style="color:blue" %)**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 LoRaWAN 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 create and connect your things everywhere.
9 9  
10 -= 1.  LA66 LoRaWAN Shield =
11 +(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 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.
11 11  
12 -
13 -== 1.1  Overview ==
14 -
15 -
16 -(((
17 -[[image:image-20220715000826-2.png||height="145" width="220"]]
18 -)))
19 -
20 -(((
21 -
22 -)))
23 -
24 -(((
25 -(% 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.
26 -)))
27 -
28 -(((
29 -(((
30 -(% 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.
31 -)))
32 -)))
33 -
34 -(((
35 -(((
36 36  Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
37 -)))
38 -)))
39 39  
40 -(((
41 -(((
42 42  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.
43 -)))
44 -)))
45 45  
46 -(((
47 -(((
48 48  LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
49 -)))
50 -)))
51 51  
19 +== Features ==
52 52  
53 53  
54 -== 1.2  Features ==
22 +== Specification ==
55 55  
24 +[[image:image-20220517072526-1.png]]
56 56  
57 -* Arduino Shield base on LA66 LoRaWAN module
58 -* Support LoRaWAN v1.0.3 protocol
59 -* Support peer-to-peer protocol
60 -* TCXO crystal to ensure RF performance on low temperature
61 -* SMA connector
62 -* Available in different frequency LoRaWAN frequency bands.
63 -* World-wide unique OTAA keys.
64 -* AT Command via UART-TTL interface
65 -* Firmware upgradable via UART interface
66 -* Ultra-long RF range
26 +Input Power Range: 1.8v ~~ 3.7v
67 67  
28 +Power Consumption: < 4uA.
68 68  
30 +Frequency Range: 150 MHz ~~ 960 MHz
69 69  
70 -== 1.3  Specification ==
32 +Maximum Power +22 dBm constant RF output
71 71  
34 +High sensitivity: -148 dBm
72 72  
73 -* CPU: 32-bit 48 MHz
74 -* Flash: 256KB
75 -* RAM: 64KB
76 -* Input Power Range: 1.8v ~~ 3.7v
77 -* Power Consumption: < 4uA.
78 -* Frequency Range: 150 MHz ~~ 960 MHz
79 -* Maximum Power +22 dBm constant RF output
80 -* High sensitivity: -148 dBm
81 -* Temperature:
82 -** Storage: -55 ~~ +125℃
83 -** Operating: -40 ~~ +85℃
84 -* Humidity:
85 -** Storage: 5 ~~ 95% (Non-Condensing)
86 -** Operating: 10 ~~ 95% (Non-Condensing)
87 -* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
88 -* LoRa Rx current: <9 mA
89 -* I/O Voltage: 3.3v
36 +Temperature:
90 90  
38 +* Storage: -55 ~~ +125℃
39 +* Operating: -40 ~~ +85℃
91 91  
41 +Humidity:
92 92  
93 -== 1.4  Pin Mapping & LED ==
43 +* Storage: 5 ~~ 95% (Non-Condensing)
44 +* Operating: 10 ~~ 95% (Non-Condensing)
94 94  
46 +LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
95 95  
96 -[[image:image-20220817085048-1.png||height="533" width="734"]]
48 +LoRa Rx current: <9 mA
97 97  
50 +I/O Voltage: 3.3v
98 98  
99 99  
100 -~1. The LED lights up red when there is an upstream data packet
101 -2. When the network is successfully connected, the green light will be on for 5 seconds
102 -3. Purple light on when receiving downlink data packets
53 +== AT Command ==
103 103  
55 +AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
104 104  
105 -[[image:image-20220820112305-1.png||height="515" width="749"]]
106 106  
58 +== Pin Mapping ==
107 107  
60 +[[image:image-20220523101537-1.png]]
108 108  
109 -== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
62 +== Land Pattern ==
110 110  
64 +[[image:image-20220517072821-2.png]]
111 111  
112 -**Show connection diagram：**
113 113  
67 +== Part Number ==
114 114  
115 -[[image:image-20220723170210-2.png||height="908" width="681"]]
69 +Part Number: **LA66-XXX**
116 116  
71 +**XX**: The default frequency band
117 117  
73 +* **AS923**: LoRaWAN AS923 band
74 +* **AU915**: LoRaWAN AU915 band
75 +* **EU433**: LoRaWAN EU433 band
76 +* **EU868**: LoRaWAN EU868 band
77 +* **KR920**: LoRaWAN KR920 band
78 +* **US915**: LoRaWAN US915 band
79 +* **IN865**: LoRaWAN IN865 band
80 +* **CN470**: LoRaWAN CN470 band
118 118  
119 -(% style="color:blue" %)**1.  open Arduino IDE**
82 += LA66 LoRaWAN Shield =
120 120  
84 +LA66 LoRaWAN Shield is the Arduino Breakout PCB to fast test the features of LA66 module and turn Arduino to support LoRaWAN.
121 121  
122 -[[image:image-20220723170545-4.png]]
86 +== Pin Mapping & LED ==
123 123  
88 +== Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
124 124  
90 +== Example: Join TTN network and send an uplink message, get downlink message. ==
125 125  
126 -(% style="color:blue" %)**2.  Open project**
92 +== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
127 127  
94 +== Upgrade Firmware of LA66 LoRaWAN Shield ==
128 128  
129 -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]]
96 +=== what needs to be used ===
130 130  
131 -[[image:image-20220726135239-1.png]]
98 +1.LA66 LoRaWAN Shield that needs to be upgraded
132 132  
100 +2.Arduino
133 133  
102 +3.USB TO TTL
134 134  
135 -(% 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**
104 +[[image:image-20220602100052-2.png]]
136 136  
106 +=== Wiring Schematic ===
137 137  
138 -[[image:image-20220726135356-2.png]]
108 +[[image:image-20220602101311-3.png]]
139 139  
110 +LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
140 140  
112 +GND  >>>>>>>>>>>>GND
141 141  
142 -(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
114 +TXD  >>>>>>>>>>>>TXD
143 143  
116 +RXD  >>>>>>>>>>>>RXD
144 144  
145 -[[image:image-20220723172235-7.png||height="480" width="1027"]]
118 +JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
146 146  
120 +Connect to the PC after connecting the wires
147 147  
122 +[[image:image-20220602102240-4.png]]
148 148  
149 -== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
124 +=== Upgrade steps ===
150 150  
126 +==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
151 151  
152 -(% style="color:blue" %)**1.  Open project**
128 +[[image:image-20220602102824-5.png]]
153 153  
130 +==== Press the RST switch on the LA66 LoRaWAN Shield once ====
154 154  
155 -Join-TTN-network source code link: [[https:~~/~~/www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0 >>https://www.dropbox.com/sh/hgtycj0go4tka2r/AAACRRIRriMAudB2m3ThH7Sba?dl=0]]
132 +[[image:image-20220602104701-12.png]]
156 156  
134 +==== Open the upgrade application software ====
157 157  
158 -[[image:image-20220723172502-8.png]]
136 +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/]]
159 159  
160 -
161 -
162 -(% 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**
163 -
164 -
165 -[[image:image-20220723172938-9.png||height="652" width="1050"]]
166 -
167 -
168 -
169 -== 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED. ==
170 -
171 -
172 -(% style="color:blue" %)**1.  Open project**
173 -
174 -
175 -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]]
176 -
177 -
178 -[[image:image-20220723173341-10.png||height="581" width="1014"]]
179 -
180 -
181 -
182 -(% 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**
183 -
184 -
185 -[[image:image-20220723173950-11.png||height="665" width="1012"]]
186 -
187 -
188 -
189 -
190 -
191 -(% style="color:blue" %)**3.  Integration into Node-red via TTNV3**
192 -
193 -
194 -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/]]
195 -
196 -
197 -[[image:image-20220723175700-12.png||height="602" width="995"]]
198 -
199 -
200 -
201 -== 1.8  Example: How to join helium ==
202 -
203 -
204 -(% style="color:blue" %)**1.  Create a new device.**
205 -
206 -
207 -[[image:image-20220907165500-1.png||height="464" width="940"]]
208 -
209 -
210 -
211 -(% style="color:blue" %)**2.  Save the device after filling in the necessary information.**
212 -
213 -
214 -[[image:image-20220907165837-2.png||height="375" width="809"]]
215 -
216 -
217 -
218 -(% style="color:blue" %)**3.  Use AT commands.**
219 -
220 -
221 -[[image:image-20220602100052-2.png||height="385" width="600"]]
222 -
223 -
224 -
225 -(% style="color:#0000ff" %)**4.  Use command AT+CFG to get device configuration**
226 -
227 -
228 -[[image:image-20220907170308-3.png||height="556" width="617"]]
229 -
230 -
231 -
232 -(% style="color:blue" %)**5.  Network successfully.**
233 -
234 -
235 -[[image:image-20220907170436-4.png]]
236 -
237 -
238 -
239 -(% style="color:blue" %)**6.  Send uplink using command**
240 -
241 -
242 -[[image:image-20220912084334-1.png]]
243 -
244 -
245 -[[image:image-20220912084412-3.png]]
246 -
247 -
248 -
249 -[[image:image-20220907170744-6.png||height="242" width="798"]]
250 -
251 -
252 -
253 -== 1.9  Upgrade Firmware of LA66 LoRaWAN Shield ==
254 -
255 -
256 -=== 1.9.1  Items needed for update ===
257 -
258 -
259 -1. LA66 LoRaWAN Shield
260 -1. Arduino
261 -1. USB TO TTL Adapter
262 -
263 -[[image:image-20220602100052-2.png||height="385" width="600"]]
264 -
265 -
266 -
267 -=== 1.9.2  Connection ===
268 -
269 -
270 -[[image:image-20220602101311-3.png||height="276" width="600"]]
271 -
272 -
273 -(((
274 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
275 -)))
276 -
277 -(((
278 -(% style="background-color:yellow" %)**GND  <-> GND
279 -TXD  <->  TXD
280 -RXD  <->  RXD**
281 -)))
282 -
283 -
284 -Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)
285 -
286 -Connect USB TTL Adapter to PC after connecting the wires
287 -
288 -
289 -[[image:image-20220602102240-4.png||height="304" width="600"]]
290 -
291 -
292 -
293 -=== 1.9.3  Upgrade steps ===
294 -
295 -
296 -
297 -==== (% style="color:blue" %)**1.  Switch SW1 to put in ISP position**(%%) ====
298 -
299 -
300 -[[image:image-20220602102824-5.png||height="306" width="600"]]
301 -
302 -
303 -
304 -
305 -==== (% style="color:blue" %)**2.  Press the RST switch once**(%%) ====
306 -
307 -
308 -[[image:image-20220817085447-1.png]]
309 -
310 -
311 -
312 -
313 -==== (% style="color:blue" %)**3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade**(%%) ====
314 -
315 -
316 -
317 -(((
318 -(% 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]]**
319 -)))
320 -
321 -
322 322  [[image:image-20220602103227-6.png]]
323 323  
324 -
325 325  [[image:image-20220602103357-7.png]]
326 326  
142 +===== Select the COM port corresponding to USB TTL =====
327 327  
328 -
329 -(% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %)
330 -(% style="color:blue" %)**2.  Select the COM port corresponding to USB TTL**
331 -
332 -
333 333  [[image:image-20220602103844-8.png]]
334 334  
146 +===== Select the bin file to burn =====
335 335  
336 -
337 -(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
338 -(% style="color:blue" %)**3.  Select the bin file to burn**
339 -
340 -
341 341  [[image:image-20220602104144-9.png]]
342 342  
343 -
344 344  [[image:image-20220602104251-10.png]]
345 345  
346 -
347 347  [[image:image-20220602104402-11.png]]
348 348  
154 +===== Click to start the download =====
349 349  
156 +[[image:image-20220602104923-13.png]]
350 350  
351 -(% class="wikigeneratedid" id="HClicktostartthedownload" %)
352 -(% style="color:blue" %)**4.  Click to start the download**
158 +===== The following figure appears to prove that the burning is in progress =====
353 353  
160 +[[image:image-20220602104948-14.png]]
354 354  
355 -[[image:image-20220602104923-13.png]]
162 +===== The following picture appears to prove that the burning is successful =====
356 356  
164 +[[image:image-20220602105251-15.png]]
357 357  
166 += LA66 USB LoRaWAN Adapter =
358 358  
359 -(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
360 -(% style="color:blue" %)**5.  Check update process**
168 +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.
361 361  
170 +Before use, please make sure that the computer has installed the CP2102 driver
362 362  
363 -[[image:image-20220602104948-14.png]]
172 +== Pin Mapping & LED ==
364 364  
174 +== Example Send & Get Messages via LoRaWAN in PC ==
365 365  
176 +Connect the LA66 LoRa Shield to the PC
366 366  
367 -(% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %)
368 -(% style="color:blue" %)**The following picture shows that the burning is successful**
178 +[[image:image-20220602171217-1.png||height="615" width="915"]]
369 369  
180 +Open the serial port tool
370 370  
371 -[[image:image-20220602105251-15.png]]
182 +[[image:image-20220602161617-8.png]]
372 372  
184 +[[image:image-20220602161718-9.png||height="529" width="927"]]
373 373  
186 +Press the reset switch RST on the LA66 LoRa Shield.
374 374  
375 -= 2.  FAQ =
188 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
376 376  
190 +[[image:image-20220602161935-10.png]]
377 377  
378 -== 2.1  How to Compile Source Code for LA66? ==
192 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
379 379  
194 +example: AT+SENDB=01,02,8,05820802581ea0a5
380 380  
381 -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]]
196 +[[image:image-20220602162157-11.png]]
382 382  
198 +Check to see if TTN received the message
383 383  
200 +[[image:image-20220602162331-12.png||height="547" width="1044"]]
384 384  
385 -== 2.2  Where to find Peer-to-Peer firmware of LA66? ==
202 +== Example Send & Get Messages via LoRaWAN in RPi ==
386 386  
204 +Connect the LA66 LoRa Shield to the RPI
387 387  
388 -Instruction for LA66 Peer to Peer firmware :[[ Instruction >>doc:.Instruction for LA66 Peer to Peer firmware.WebHome]]
206 +[[image:image-20220602171233-2.png||height="592" width="881"]]
389 389  
208 +Log in to the RPI's terminal and connect to the serial port
390 390  
210 +[[image:image-20220602153146-3.png]]
391 391  
392 -= 3.  Order Info =
212 +Press the reset switch RST on the LA66 LoRa Shield.
213 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
393 393  
215 +[[image:image-20220602154928-5.png]]
394 394  
395 -**Part Number:**   (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%)
217 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
396 396  
219 +example: AT+SENDB=01,02,8,05820802581ea0a5
397 397  
398 -(% style="color:blue" %)**XXX**(%%): The default frequency band
221 +[[image:image-20220602160339-6.png]]
399 399  
400 -* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
401 -* (% style="color:red" %)**AU915**(%%):  LoRaWAN AU915 band
402 -* (% style="color:red" %)**EU433**(%%):  LoRaWAN EU433 band
403 -* (% style="color:red" %)**EU868**(%%):  LoRaWAN EU868 band
404 -* (% style="color:red" %)**KR920**(%%):  LoRaWAN KR920 band
405 -* (% style="color:red" %)**US915**(%%):  LoRaWAN US915 band
406 -* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
407 -* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
408 -* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
223 +Check to see if TTN received the message
409 409  
225 +[[image:image-20220602160627-7.png||height="468" width="1013"]]
410 410  
227 +=== Install Minicom ===
411 411  
412 -= 4.  Reference =
229 +Enter the following command in the RPI terminal
413 413  
231 +apt update
414 414  
415 -* Hardware Design File for LA66 LoRaWAN Shield : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
233 +[[image:image-20220602143155-1.png]]
416 416  
235 +apt install minicom
417 417  
237 +[[image:image-20220602143744-2.png]]
418 418  
419 -= 5.  FCC Statement =
239 +=== Send PC's CPU/RAM usage to TTN via script. ===
420 420  
241 +==== Take python as an example： ====
421 421  
422 -(% style="color:red" %)**FCC Caution:**
243 +===== Preconditions: =====
423 423  
424 -Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
245 +1.LA66 USB LoRaWAN Adapter works fine
425 425  
426 -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.
247 +2.LA66 USB LoRaWAN Adapter  is registered with TTN
427 427  
249 +===== Steps for usage =====
428 428  
429 -(% style="color:red" %)**IMPORTANT NOTE: **
251 +1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
430 430  
431 -(% 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:
253 +2.Run the script and see the TTN
432 432  
433 -—Reorient or relocate the receiving antenna.
255 +[[image:image-20220602115852-3.png]]
434 434  
435 -—Increase the separation between the equipment and receiver.
436 436  
437 -—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
438 438  
439 -—Consult the dealer or an experienced radio/TV technician for help.
259 +== Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
440 440  
441 441  
442 -(% style="color:red" %)**FCC Radiation Exposure Statement: **
262 +== Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
443 443  
444 -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. 
264 +
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