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Last modified by Xiaoling on 2023/05/26 14:19
From version 62.1
edited by Herong Lu
on 2022/06/02 17:19
Change comment: There is no comment for this version
To version 165.5
edited by Xiaoling
on 2022/10/10 11:39
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.Lu
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 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.
10 10  
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.
10 += 1.  LA66 LoRaWAN Shield =
12 12  
13 -**Each LA66 **module includes a world unique OTAA key for LoRaWAN registration.
14 14  
13 +== 1.1  Overview ==
15 15  
16 16  
17 -== Specification ==
16 +(((
17 +[[image:image-20220715000826-2.png||height="145" width="220"]]
18 +)))
18 18  
19 -[[image:image-20220517072526-1.png]]
20 +(((
21 +
22 +)))
20 20  
21 -Input Power Range: 1.8v ~~ 3.7v
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 +)))
22 22  
23 -Power Consumption: < 4uA.
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 +)))
24 24  
25 -Frequency Range: 150 MHz ~~ 960 MHz
34 +(((
35 +(((
36 +Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
37 +)))
38 +)))
26 26  
27 -Maximum Power +22 dBm constant RF output
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 +)))
28 28  
29 -High sensitivity: -148 dBm
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 +)))
30 30  
31 -Temperature:
32 32  
33 -* Storage: -55 ~~ +125℃
34 -* Operating: -40 ~~ +85℃
35 35  
36 -Humidity:
54 +== 1.2  Features ==
37 37  
38 -* Storage: 5 ~~ 95% (Non-Condensing)
39 -* Operating: 10 ~~ 95% (Non-Condensing)
40 40  
41 -LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
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
42 42  
43 -LoRa Rx current: <9 mA
44 44  
45 -I/O Voltage: 3.3v
46 46  
70 +== 1.3  Specification ==
47 47  
48 -== AT Command ==
49 49  
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.
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
51 51  
52 52  
53 -== Pin Mapping ==
54 54  
55 -[[image:image-20220523101537-1.png]]
93 +== 1.4  Pin Mapping & LED ==
56 56  
57 -== Land Pattern ==
58 58  
59 -[[image:image-20220517072821-2.png]]
96 +[[image:image-20220817085048-1.png||height="533" width="734"]]
60 60  
61 61  
62 -== Part Number ==
63 63  
64 -Part Number: **LA66-XXX**
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
65 65  
66 -**XX**: The default frequency band
67 67  
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
105 +[[image:image-20220820112305-1.png||height="515" width="749"]]
76 76  
77 -= LA66 LoRaWAN Shield =
78 78  
79 -LA66 LoRaWAN Shield is the Arduino Breakout PCB to fast test the features of LA66 module and turn Arduino to support LoRaWAN.
80 80  
81 -== Pin Mapping & LED ==
109 +== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
82 82  
83 -== Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
84 84  
85 -== Example: Join TTN network and send an uplink message, get downlink message. ==
112 +**Show connection diagram：**
86 86  
87 -== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
88 88  
89 -== Upgrade Firmware of LA66 LoRaWAN Shield ==
115 +[[image:image-20220723170210-2.png||height="908" width="681"]]
90 90  
91 -=== what needs to be used ===
92 92  
93 -1.LA66 LoRaWAN Shield that needs to be upgraded
94 94  
95 -2.Arduino
119 +(% style="color:blue" %)**1.  open Arduino IDE**
96 96  
97 -3.USB TO TTL
98 98  
99 -[[image:image-20220602100052-2.png]]
122 +[[image:image-20220723170545-4.png]]
100 100  
101 -=== Wiring Schematic ===
102 102  
103 -[[image:image-20220602101311-3.png]]
104 104  
105 -LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
126 +(% style="color:blue" %)**2.  Open project**
106 106  
107 -GND  >>>>>>>>>>>>GND
108 108  
109 -TXD  >>>>>>>>>>>>TXD
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]]
110 110  
111 -RXD  >>>>>>>>>>>>RXD
112 112  
113 -JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
132 +[[image:image-20220726135239-1.png]]
114 114  
115 -Connect to the PC after connecting the wires
116 116  
117 -[[image:image-20220602102240-4.png]]
118 118  
119 -=== Upgrade steps ===
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**
120 120  
121 -==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
122 122  
123 -[[image:image-20220602102824-5.png]]
139 +[[image:image-20220726135356-2.png]]
124 124  
125 -==== Press the RST switch on the LA66 LoRaWAN Shield once ====
126 126  
127 -[[image:image-20220602104701-12.png]]
128 128  
129 -==== Open the upgrade application software ====
143 +(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
130 130  
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/]]
132 132  
146 +[[image:image-20220723172235-7.png||height="480" width="1027"]]
147 +
148 +
149 +
150 +== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
151 +
152 +
153 +(% style="color:blue" %)**1.  Open project**
154 +
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]]
157 +
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 +
133 133  [[image:image-20220602103227-6.png]]
134 134  
325 +
135 135  [[image:image-20220602103357-7.png]]
136 136  
137 -===== Select the COM port corresponding to USB TTL =====
138 138  
329 +
330 +(% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %)
331 +(% style="color:blue" %)**2.  Select the COM port corresponding to USB TTL**
332 +
333 +
139 139  [[image:image-20220602103844-8.png]]
140 140  
141 -===== Select the bin file to burn =====
142 142  
337 +
338 +(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
339 +(% style="color:blue" %)**3.  Select the bin file to burn**
340 +
341 +
143 143  [[image:image-20220602104144-9.png]]
144 144  
344 +
145 145  [[image:image-20220602104251-10.png]]
146 146  
347 +
147 147  [[image:image-20220602104402-11.png]]
148 148  
149 -===== Click to start the download =====
150 150  
151 -[[image:image-20220602104923-13.png]]
152 152  
153 -===== The following figure appears to prove that the burning is in progress =====
352 +(% class="wikigeneratedid" id="HClicktostartthedownload" %)
353 +(% style="color:blue" %)**4.  Click to start the download**
154 154  
155 -[[image:image-20220602104948-14.png]]
156 156  
157 -===== The following picture appears to prove that the burning is successful =====
356 +[[image:image-20220602104923-13.png]]
158 158  
159 -[[image:image-20220602105251-15.png]]
160 160  
161 -= LA66 USB LoRaWAN Adapter =
162 162  
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.
360 +(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
361 +(% style="color:blue" %)**5.  Check update process**
164 164  
165 -Before use, please make sure that the computer has installed the CP2102 driver
166 166  
167 -== Pin Mapping & LED ==
364 +[[image:image-20220602104948-14.png]]
168 168  
169 -== Example Send & Get Messages via LoRaWAN in PC ==
170 170  
171 -Connect the LA66 LoRa Shield to the PC
172 172  
173 -[[image:image-20220602171217-1.png||height="615" width="915"]]
368 +(% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %)
369 +(% style="color:blue" %)**The following picture shows that the burning is successful**
174 174  
175 -Open the serial port tool
176 176  
177 -[[image:image-20220602161617-8.png]]
372 +[[image:image-20220602105251-15.png]]
178 178  
179 -[[image:image-20220602161718-9.png||height="529" width="927"]]
180 180  
181 -Press the reset switch RST on the LA66 LoRa Shield.
182 182  
183 -The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
376 += 2.  FAQ =
184 184  
185 -[[image:image-20220602161935-10.png]]
186 186  
187 -send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
379 +== 2.1  How to Compile Source Code for LA66? ==
188 188  
189 -example: AT+SENDB=01,02,8,05820802581ea0a5
190 190  
191 -[[image:image-20220602162157-11.png]]
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]]
192 192  
193 -Check to see if TTN received the message
194 194  
195 -[[image:image-20220602162331-12.png||height="547" width="1044"]]
196 196  
197 -== Example Send & Get Messages via LoRaWAN in RPi ==
386 +== 2.2  Where to find Peer-to-Peer firmware of LA66? ==
198 198  
199 -Connect the LA66 LoRa Shield to the RPI
200 200  
201 -[[image:image-20220602171233-2.png||height="592" width="881"]]
389 +Instruction for LA66 Peer to Peer firmware :[[ Instruction >>doc:.Instruction for LA66 Peer to Peer firmware.WebHome]]
202 202  
203 -Log in to the RPI's terminal and connect to the serial port
204 204  
205 -[[image:image-20220602153146-3.png]]
206 206  
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
393 += 3.  Order Info =
209 209  
210 -[[image:image-20220602154928-5.png]]
211 211  
212 -send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
396 +**Part Number:**   (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%)
213 213  
214 -example: AT+SENDB=01,02,8,05820802581ea0a5
215 215  
216 -[[image:image-20220602160339-6.png]]
399 +(% style="color:blue" %)**XXX**(%%): The default frequency band
217 217  
218 -Check to see if TTN received the message
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
219 219  
220 -[[image:image-20220602160627-7.png||height="468" width="1013"]]
221 221  
222 -=== Install Minicom ===
223 223  
224 -Enter the following command in the RPI terminal
413 += 4.  Reference =
225 225  
226 -apt update
227 227  
228 -[[image:image-20220602143155-1.png]]
416 +* Hardware Design File for LA66 LoRaWAN Shield : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
229 229  
230 -apt install minicom
231 231  
232 -[[image:image-20220602143744-2.png]]
233 233  
234 -=== Send PC's CPU/RAM usage to TTN via script. ===
420 += 5.  FCC Statement =
235 235  
236 -==== Take python as an example： ====
237 237  
238 -===== Preconditions: =====
423 +(% style="color:red" %)**FCC Caution:**
239 239  
240 -1.LA66 USB LoRaWAN Adapter works fine
425 +Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
241 241  
242 -2.LA66 USB LoRaWAN Adapter  is registered with TTN
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.
243 243  
244 -===== Steps for usage =====
245 245  
246 -1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
430 +(% style="color:red" %)**IMPORTANT NOTE: **
247 247  
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:
248 248  
249 -2.Run the script and see the TTN
434 +—Reorient or relocate the receiving antenna.
250 250  
251 -[[image:image-20220602115852-3.png]]
436 +—Increase the separation between the equipment and receiver.
252 252  
438 +—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
253 253  
440 +—Consult the dealer or an experienced radio/TV technician for help.
254 254  
255 -== Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
256 256  
443 +(% style="color:red" %)**FCC Radiation Exposure Statement: **
257 257  
258 -== Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
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. 
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