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Last modified by Xiaoling on 2023/05/26 14:19
From version 64.1
edited by Edwin Chen
on 2022/07/02 21:03
Change comment: There is no comment for this version
To version 165.4
edited by Xiaoling
on 2022/10/10 11:37
Change comment: There is no comment for this version

Summary

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