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Last modified by Xiaoling on 2023/05/26 14:19
From version 165.5
edited by Xiaoling
on 2022/10/10 11:39
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/cx0pspkwu62pr97/AAAbKh2ioPdZfSDtdDpooYqha?dl=0>>https://www.dropbox.com/sh/cx0pspkwu62pr97/AAAbKh2ioPdZfSDtdDpooYqha?dl=0]]
96 +=== what needs to be used ===
130 130  
98 +1.LA66 LoRaWAN Shield that needs to be upgraded
131 131  
132 -[[image:image-20220726135239-1.png]]
100 +2.Arduino
133 133  
102 +3.USB TO TTL
134 134  
104 +[[image:image-20220602100052-2.png]]
135 135  
136 -(% 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**
106 +=== Wiring Schematic ===
137 137  
108 +[[image:image-20220602101311-3.png]]
138 138  
139 -[[image:image-20220726135356-2.png]]
110 +LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
140 140  
112 +GND  >>>>>>>>>>>>GND
141 141  
114 +TXD  >>>>>>>>>>>>TXD
142 142  
143 -(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
116 +RXD  >>>>>>>>>>>>RXD
144 144  
118 +JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
145 145  
146 -[[image:image-20220723172235-7.png||height="480" width="1027"]]
120 +Connect to the PC after connecting the wires
147 147  
122 +[[image:image-20220602102240-4.png]]
148 148  
124 +=== Upgrade steps ===
149 149  
150 -== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
126 +==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
151 151  
128 +[[image:image-20220602102824-5.png]]
152 152  
153 -(% style="color:blue" %)**1.  Open project**
130 +==== Press the RST switch on the LA66 LoRaWAN Shield once ====
154 154  
132 +[[image:image-20220602104701-12.png]]
155 155  
156 -Join-TTN-network source code link: [[https:~~/~~/www.dropbox.com/sh/0sjyncafa0gjv00/AACC2m1orov-QHRkvH8-ddCka?dl=0>>https://www.dropbox.com/sh/0sjyncafa0gjv00/AACC2m1orov-QHRkvH8-ddCka?dl=0]]
134 +==== Open the upgrade application software ====
157 157  
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/]]
158 158  
159 -[[image:image-20220723172502-8.png]]
160 -
161 -
162 -
163 -(% 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**
164 -
165 -
166 -[[image:image-20220723172938-9.png||height="652" width="1050"]]
167 -
168 -
169 -
170 -== 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED. ==
171 -
172 -
173 -(% style="color:blue" %)**1.  Open project**
174 -
175 -
176 -Log-Temperature-Sensor-and-send-data-to-TTN source code link: [[https:~~/~~/www.dropbox.com/sh/0aagmrpec1lxmva/AABMXWVMSHG9dK1_Zv_7xOmCa?dl=0>>https://www.dropbox.com/sh/0aagmrpec1lxmva/AABMXWVMSHG9dK1_Zv_7xOmCa?dl=0]]
177 -
178 -
179 -[[image:image-20220723173341-10.png||height="581" width="1014"]]
180 -
181 -
182 -
183 -(% 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**
184 -
185 -
186 -[[image:image-20220723173950-11.png||height="665" width="1012"]]
187 -
188 -
189 -
190 -
191 -
192 -(% style="color:blue" %)**3.  Integration into Node-red via TTNV3**
193 -
194 -
195 -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/]]
196 -
197 -
198 -[[image:image-20220723175700-12.png||height="602" width="995"]]
199 -
200 -
201 -
202 -== 1.8  Example: How to join helium ==
203 -
204 -
205 -(% style="color:blue" %)**1.  Create a new device.**
206 -
207 -
208 -[[image:image-20220907165500-1.png||height="464" width="940"]]
209 -
210 -
211 -
212 -(% style="color:blue" %)**2.  Save the device after filling in the necessary information.**
213 -
214 -
215 -[[image:image-20220907165837-2.png||height="375" width="809"]]
216 -
217 -
218 -
219 -(% style="color:blue" %)**3.  Use AT commands.**
220 -
221 -
222 -[[image:image-20220602100052-2.png||height="385" width="600"]]
223 -
224 -
225 -
226 -(% style="color:#0000ff" %)**4.  Use command AT+CFG to get device configuration**
227 -
228 -
229 -[[image:image-20220907170308-3.png||height="556" width="617"]]
230 -
231 -
232 -
233 -(% style="color:blue" %)**5.  Network successfully.**
234 -
235 -
236 -[[image:image-20220907170436-4.png]]
237 -
238 -
239 -
240 -(% style="color:blue" %)**6.  Send uplink using command**
241 -
242 -
243 -[[image:image-20220912084334-1.png]]
244 -
245 -
246 -[[image:image-20220912084412-3.png]]
247 -
248 -
249 -
250 -[[image:image-20220907170744-6.png||height="242" width="798"]]
251 -
252 -
253 -
254 -== 1.9  Upgrade Firmware of LA66 LoRaWAN Shield ==
255 -
256 -
257 -=== 1.9.1  Items needed for update ===
258 -
259 -
260 -1. LA66 LoRaWAN Shield
261 -1. Arduino
262 -1. USB TO TTL Adapter
263 -
264 -[[image:image-20220602100052-2.png||height="385" width="600"]]
265 -
266 -
267 -
268 -=== 1.9.2  Connection ===
269 -
270 -
271 -[[image:image-20220602101311-3.png||height="276" width="600"]]
272 -
273 -
274 -(((
275 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
276 -)))
277 -
278 -(((
279 -(% style="background-color:yellow" %)**GND  <-> GND
280 -TXD  <->  TXD
281 -RXD  <->  RXD**
282 -)))
283 -
284 -
285 -Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)
286 -
287 -Connect USB TTL Adapter to PC after connecting the wires
288 -
289 -
290 -[[image:image-20220602102240-4.png||height="304" width="600"]]
291 -
292 -
293 -
294 -=== 1.9.3  Upgrade steps ===
295 -
296 -
297 -
298 -==== (% style="color:blue" %)**1.  Switch SW1 to put in ISP position**(%%) ====
299 -
300 -
301 -[[image:image-20220602102824-5.png||height="306" width="600"]]
302 -
303 -
304 -
305 -
306 -==== (% style="color:blue" %)**2.  Press the RST switch once**(%%) ====
307 -
308 -
309 -[[image:image-20220817085447-1.png]]
310 -
311 -
312 -
313 -
314 -==== (% style="color:blue" %)**3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade**(%%) ====
315 -
316 -
317 -
318 -(((
319 -(% 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]]**
320 -)))
321 -
322 -
323 323  [[image:image-20220602103227-6.png]]
324 324  
325 -
326 326  [[image:image-20220602103357-7.png]]
327 327  
142 +===== Select the COM port corresponding to USB TTL =====
328 328  
329 -
330 -(% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %)
331 -(% style="color:blue" %)**2.  Select the COM port corresponding to USB TTL**
332 -
333 -
334 334  [[image:image-20220602103844-8.png]]
335 335  
146 +===== Select the bin file to burn =====
336 336  
337 -
338 -(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
339 -(% style="color:blue" %)**3.  Select the bin file to burn**
340 -
341 -
342 342  [[image:image-20220602104144-9.png]]
343 343  
344 -
345 345  [[image:image-20220602104251-10.png]]
346 346  
347 -
348 348  [[image:image-20220602104402-11.png]]
349 349  
154 +===== Click to start the download =====
350 350  
156 +[[image:image-20220602104923-13.png]]
351 351  
352 -(% class="wikigeneratedid" id="HClicktostartthedownload" %)
353 -(% style="color:blue" %)**4.  Click to start the download**
158 +===== The following figure appears to prove that the burning is in progress =====
354 354  
160 +[[image:image-20220602104948-14.png]]
355 355  
356 -[[image:image-20220602104923-13.png]]
162 +===== The following picture appears to prove that the burning is successful =====
357 357  
164 +[[image:image-20220602105251-15.png]]
358 358  
166 += LA66 USB LoRaWAN Adapter =
359 359  
360 -(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
361 -(% 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.
362 362  
170 +Before use, please make sure that the computer has installed the CP2102 driver
363 363  
364 -[[image:image-20220602104948-14.png]]
172 +== Pin Mapping & LED ==
365 365  
174 +== Example Send & Get Messages via LoRaWAN in PC ==
366 366  
176 +Connect the LA66 LoRa Shield to the PC
367 367  
368 -(% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %)
369 -(% style="color:blue" %)**The following picture shows that the burning is successful**
178 +[[image:image-20220602171217-1.png||height="615" width="915"]]
370 370  
180 +Open the serial port tool
371 371  
372 -[[image:image-20220602105251-15.png]]
182 +[[image:image-20220602161617-8.png]]
373 373  
184 +[[image:image-20220602161718-9.png||height="529" width="927"]]
374 374  
186 +Press the reset switch RST on the LA66 LoRa Shield.
375 375  
376 -= 2.  FAQ =
188 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
377 377  
190 +[[image:image-20220602161935-10.png]]
378 378  
379 -== 2.1  How to Compile Source Code for LA66? ==
192 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
380 380  
194 +example: AT+SENDB=01,02,8,05820802581ea0a5
381 381  
382 -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]]
383 383  
198 +Check to see if TTN received the message
384 384  
200 +[[image:image-20220602162331-12.png||height="547" width="1044"]]
385 385  
386 -== 2.2  Where to find Peer-to-Peer firmware of LA66? ==
202 +== Example Send & Get Messages via LoRaWAN in RPi ==
387 387  
204 +Connect the LA66 LoRa Shield to the RPI
388 388  
389 -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"]]
390 390  
208 +Log in to the RPI's terminal and connect to the serial port
391 391  
210 +[[image:image-20220602153146-3.png]]
392 392  
393 -= 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
394 394  
215 +[[image:image-20220602154928-5.png]]
395 395  
396 -**Part Number:**   (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%)
217 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
397 397  
219 +example: AT+SENDB=01,02,8,05820802581ea0a5
398 398  
399 -(% style="color:blue" %)**XXX**(%%): The default frequency band
221 +[[image:image-20220602160339-6.png]]
400 400  
401 -* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
402 -* (% style="color:red" %)**AU915**(%%):  LoRaWAN AU915 band
403 -* (% style="color:red" %)**EU433**(%%):  LoRaWAN EU433 band
404 -* (% style="color:red" %)**EU868**(%%):  LoRaWAN EU868 band
405 -* (% style="color:red" %)**KR920**(%%):  LoRaWAN KR920 band
406 -* (% style="color:red" %)**US915**(%%):  LoRaWAN US915 band
407 -* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
408 -* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
409 -* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
223 +Check to see if TTN received the message
410 410  
225 +[[image:image-20220602160627-7.png||height="468" width="1013"]]
411 411  
227 +=== Install Minicom ===
412 412  
413 -= 4.  Reference =
229 +Enter the following command in the RPI terminal
414 414  
231 +apt update
415 415  
416 -* Hardware Design File for LA66 LoRaWAN Shield : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
233 +[[image:image-20220602143155-1.png]]
417 417  
235 +apt install minicom
418 418  
237 +[[image:image-20220602143744-2.png]]
419 419  
420 -= 5.  FCC Statement =
239 +=== Send PC's CPU/RAM usage to TTN via script. ===
421 421  
241 +==== Take python as an example： ====
422 422  
423 -(% style="color:red" %)**FCC Caution:**
243 +===== Preconditions: =====
424 424  
425 -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
426 426  
427 -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
428 428  
249 +===== Steps for usage =====
429 429  
430 -(% style="color:red" %)**IMPORTANT NOTE: **
251 +1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
431 431  
432 -(% 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
433 433  
434 -—Reorient or relocate the receiving antenna.
255 +[[image:image-20220602115852-3.png]]
435 435  
436 -—Increase the separation between the equipment and receiver.
437 437  
438 -—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
439 439  
440 -—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. ==
441 441  
442 442  
443 -(% style="color:red" %)**FCC Radiation Exposure Statement: **
262 +== Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
444 444  
445 -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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