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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 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 -== 1.1  Overview ==
13 -
14 -
15 -(((
16 -[[image:image-20220715000826-2.png||height="145" width="220"]]
17 -)))
18 -
19 -(((
20 -
21 -)))
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 -)))
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 -)))
32 -
33 -(((
34 -(((
35 35  Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
36 -)))
37 -)))
38 38  
39 -(((
40 -(((
41 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 -)))
44 44  
45 -(((
46 -(((
47 47  LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
48 -)))
49 -)))
50 50  
19 +== Features ==
51 51  
52 -== 1.2  Features ==
53 53  
22 +== Specification ==
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
24 +[[image:image-20220517072526-1.png]]
65 65  
26 +Input Power Range: 1.8v ~~ 3.7v
66 66  
67 -== 1.3  Specification ==
28 +Power Consumption: < 4uA.
68 68  
30 +Frequency Range: 150 MHz ~~ 960 MHz
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
32 +Maximum Power +22 dBm constant RF output
87 87  
34 +High sensitivity: -148 dBm
88 88  
89 -== 1.4  Pin Mapping & LED ==
36 +Temperature:
90 90  
38 +* Storage: -55 ~~ +125℃
39 +* Operating: -40 ~~ +85℃
91 91  
92 -[[image:image-20220817085048-1.png||height="533" width="734"]]
41 +Humidity:
93 93  
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 -~1. The LED lights up red when there is an upstream data packet
48 +LoRa Rx current: <9 mA
97 97  
98 -2. When the network is successfully connected, the green light will be on for 5 seconds
50 +I/O Voltage: 3.3v
99 99  
100 -3. Purple light on when receiving downlink data packets
101 101  
53 +== AT Command ==
102 102  
103 -[[image:image-20220820112305-1.png||height="515" width="749"]]
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  
105 105  
106 -== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
58 +== Pin Mapping ==
107 107  
60 +[[image:image-20220523101537-1.png]]
108 108  
109 -(% style="color:blue" %)**Show connection diagram：**
62 +== Land Pattern ==
110 110  
64 +[[image:image-20220517072821-2.png]]
111 111  
112 -[[image:image-20220723170210-2.png||height="908" width="681"]]
113 113  
67 +== Part Number ==
114 114  
69 +Part Number: **LA66-XXX**
115 115  
116 -(% style="color:blue" %)**1.  open Arduino IDE**
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 -[[image:image-20220723170545-4.png]]
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  
86 +== Pin Mapping & LED ==
122 122  
123 -(% style="color:blue" %)**2.  Open project**
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 -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]]
92 +== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
127 127  
128 -[[image:image-20220726135239-1.png]]
94 +== Upgrade Firmware of LA66 LoRaWAN Shield ==
129 129  
96 +=== what needs to be used ===
130 130  
98 +1.LA66 LoRaWAN Shield that needs to be upgraded
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**
100 +2.Arduino
133 133  
102 +3.USB TO TTL
134 134  
135 -[[image:image-20220726135356-2.png]]
104 +[[image:image-20220602100052-2.png]]
136 136  
106 +=== Wiring Schematic ===
137 137  
108 +[[image:image-20220602101311-3.png]]
138 138  
139 -(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
110 +LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
140 140  
112 +GND  >>>>>>>>>>>>GND
141 141  
142 -[[image:image-20220723172235-7.png||height="480" width="1027"]]
114 +TXD  >>>>>>>>>>>>TXD
143 143  
116 +RXD  >>>>>>>>>>>>RXD
144 144  
145 -== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
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  
148 -(% style="color:blue" %)**1.  Open project**
122 +[[image:image-20220602102240-4.png]]
149 149  
124 +=== Upgrade steps ===
150 150  
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]]
126 +==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
152 152  
128 +[[image:image-20220602102824-5.png]]
153 153  
154 -[[image:image-20220723172502-8.png]]
130 +==== Press the RST switch on the LA66 LoRaWAN Shield once ====
155 155  
132 +[[image:image-20220602104701-12.png]]
156 156  
134 +==== Open the upgrade application software ====
157 157  
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**
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 -[[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  
142 +===== 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  
146 +===== Select the bin file to burn =====
321 321  
148 +[[image:image-20220602104144-9.png]]
322 322  
323 -(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
324 -(% style="color:blue" %)**3.  Select the bin file to burn**
150 +[[image:image-20220602104251-10.png]]
325 325  
152 +[[image:image-20220602104402-11.png]]
326 326  
327 -[[image:image-20220602104144-9.png]]
154 +===== Click to start the download =====
328 328  
156 +[[image:image-20220602104923-13.png]]
329 329  
330 -[[image:image-20220602104251-10.png]]
158 +===== The following figure appears to prove that the burning is in progress =====
331 331  
160 +[[image:image-20220602104948-14.png]]
332 332  
333 -[[image:image-20220602104402-11.png]]
162 +===== The following picture appears to prove that the burning is successful =====
334 334  
164 +[[image:image-20220602105251-15.png]]
335 335  
166 += LA66 USB LoRaWAN Adapter =
336 336  
337 -(% class="wikigeneratedid" id="HClicktostartthedownload" %)
338 -(% style="color:blue" %)**4.  Click to start the download**
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.
339 339  
170 +Before use, please make sure that the computer has installed the CP2102 driver
340 340  
341 -[[image:image-20220602104923-13.png]]
172 +== Pin Mapping & LED ==
342 342  
174 +== Example Send & Get Messages via LoRaWAN in PC ==
343 343  
176 +Connect the LA66 LoRa Shield to the PC
344 344  
345 -(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
346 -(% style="color:blue" %)**5.  Check update process**
178 +[[image:image-20220602171217-1.png||height="615" width="915"]]
347 347  
180 +Open the serial port tool
348 348  
349 -[[image:image-20220602104948-14.png]]
182 +[[image:image-20220602161617-8.png]]
350 350  
184 +[[image:image-20220602161718-9.png||height="529" width="927"]]
351 351  
186 +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**
188 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
355 355  
190 +[[image:image-20220602161935-10.png]]
356 356  
357 -[[image:image-20220602105251-15.png]]
192 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
358 358  
194 +example: AT+SENDB=01,02,8,05820802581ea0a5
359 359  
360 -= 2.  FAQ =
196 +[[image:image-20220602162157-11.png]]
361 361  
362 -== 2.1  How to Compile Source Code for LA66? ==
198 +Check to see if TTN received the message
363 363  
200 +[[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]]
202 +== Example Send & Get Messages via LoRaWAN in RPi ==
366 366  
204 +Connect the LA66 LoRa Shield to the RPI
367 367  
368 -== 2.2  Where to find Peer-to-Peer firmware of LA66? ==
206 +[[image:image-20220602171233-2.png||height="592" width="881"]]
369 369  
208 +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]]
210 +[[image:image-20220602153146-3.png]]
372 372  
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
373 373  
374 -= 3.  Order Info =
215 +[[image:image-20220602154928-5.png]]
375 375  
217 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
376 376  
377 -**Part Number:**   (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%)
219 +example: AT+SENDB=01,02,8,05820802581ea0a5
378 378  
379 -(% style="color:blue" %)**XXX**(%%): The default frequency band
221 +[[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
223 +Check to see if TTN received the message
390 390  
225 +[[image:image-20220602160627-7.png||height="468" width="1013"]]
391 391  
227 +=== Install Minicom ===
392 392  
393 -= 4.  Reference =
229 +Enter the following command in the RPI terminal
394 394  
231 +apt update
395 395  
396 -* Hardware Design File for LA66 LoRaWAN Shield : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
233 +[[image:image-20220602143155-1.png]]
397 397  
235 +apt install minicom
398 398  
237 +[[image:image-20220602143744-2.png]]
399 399  
400 -= 5.  FCC Statement =
239 +=== Send PC's CPU/RAM usage to TTN via script. ===
401 401  
241 +==== Take python as an example： ====
402 402  
403 -(% style="color:red" %)**FCC Caution:**
243 +===== 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.
245 +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.
247 +2.LA66 USB LoRaWAN Adapter  is registered with TTN
408 408  
249 +===== Steps for usage =====
409 409  
410 -(% style="color:red" %)**IMPORTANT NOTE: **
251 +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:
253 +2.Run the script and see the TTN
413 413  
414 -—Reorient or relocate the receiving antenna.
255 +[[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.
259 +== 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: **
262 +== 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 -
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