<
From version < 87.6 >
edited by Xiaoling
on 2022/07/13 09:59
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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Author
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1 -XWiki.Xiaoling
1 +XWiki.Edwin
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1 -
2 -
3 3  {{box cssClass="floatinginfobox" title="**Contents**"}}
4 4  {{toc/}}
5 5  {{/box}}
6 6  
7 -{{toc/}}
5 += LA66 LoRaWAN Module =
8 8  
7 +== What is LA66 LoRaWAN Module ==
9 9  
10 -
11 -= 1.  LA66 LoRaWAN Module =
12 -
13 -
14 -== 1.1  What is LA66 LoRaWAN Module ==
15 -
16 -
17 17  (% 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.
18 18  
19 19  (% 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.
... ... @@ -24,419 +24,249 @@
24 24  
25 25  LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
26 26  
19 +== Features ==
27 27  
28 -== 1.2  Features ==
29 29  
30 -* Support LoRaWAN v1.0.4 protocol
31 -* Support peer-to-peer protocol
32 -* TCXO crystal to ensure RF performance on low temperature
33 -* SMD Antenna pad and i-pex antenna connector
34 -* Available in different frequency LoRaWAN frequency bands.
35 -* World-wide unique OTAA keys.
36 -* AT Command via UART-TTL interface
37 -* Firmware upgradable via UART interface
38 -* Ultra-long RF range
22 +== Specification ==
39 39  
40 -== 1.3  Specification ==
41 -
42 -* CPU: 32-bit 48 MHz
43 -* Flash: 256KB
44 -* RAM: 64KB
45 -* Input Power Range: 1.8v ~~ 3.7v
46 -* Power Consumption: < 4uA.
47 -* Frequency Range: 150 MHz ~~ 960 MHz
48 -* Maximum Power +22 dBm constant RF output
49 -* High sensitivity: -148 dBm
50 -* Temperature:
51 -** Storage: -55 ~~ +125℃
52 -** Operating: -40 ~~ +85℃
53 -* Humidity:
54 -** Storage: 5 ~~ 95% (Non-Condensing)
55 -** Operating: 10 ~~ 95% (Non-Condensing)
56 -* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
57 -* LoRa Rx current: <9 mA
58 -* I/O Voltage: 3.3v
59 -
60 -== 1.4  AT Command ==
61 -
62 -AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
63 -
64 -
65 -== 1.5  Dimension ==
66 -
67 67  [[image:image-20220517072526-1.png]]
68 68  
26 +Input Power Range: 1.8v ~~ 3.7v
69 69  
28 +Power Consumption: < 4uA.
70 70  
71 -== 1.6  Pin Mapping ==
30 +Frequency Range: 150 MHz ~~ 960 MHz
72 72  
32 +Maximum Power +22 dBm constant RF output
73 73  
74 -[[image:image-20220523101537-1.png]]
34 +High sensitivity: -148 dBm
75 75  
36 +Temperature:
76 76  
38 +* Storage: -55 ~~ +125℃
39 +* Operating: -40 ~~ +85℃
77 77  
78 -== 1.7  Land Pattern ==
41 +Humidity:
79 79  
80 -[[image:image-20220517072821-2.png]]
43 +* Storage: 5 ~~ 95% (Non-Condensing)
44 +* Operating: 10 ~~ 95% (Non-Condensing)
81 81  
46 +LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
82 82  
48 +LoRa Rx current: <9 mA
83 83  
84 -= 2.  LA66 LoRaWAN Shield =
50 +I/O Voltage: 3.3v
85 85  
86 86  
87 -== 2.1  Overview ==
53 +== AT Command ==
88 88  
89 -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.
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.
90 90  
91 91  
92 -== 2.2  Features ==
58 +== Pin Mapping ==
93 93  
94 -* Arduino Shield base on LA66 LoRaWAN module
95 -* Support LoRaWAN v1.0.4 protocol
96 -* Support peer-to-peer protocol
97 -* TCXO crystal to ensure RF performance on low temperature
98 -* SMA connector
99 -* Available in different frequency LoRaWAN frequency bands.
100 -* World-wide unique OTAA keys.
101 -* AT Command via UART-TTL interface
102 -* Firmware upgradable via UART interface
103 -* Ultra-long RF range
60 +[[image:image-20220523101537-1.png]]
104 104  
105 -== 2.3  Specification ==
62 +== Land Pattern ==
106 106  
107 -* CPU: 32-bit 48 MHz
108 -* Flash: 256KB
109 -* RAM: 64KB
110 -* Input Power Range: 1.8v ~~ 3.7v
111 -* Power Consumption: < 4uA.
112 -* Frequency Range: 150 MHz ~~ 960 MHz
113 -* Maximum Power +22 dBm constant RF output
114 -* High sensitivity: -148 dBm
115 -* Temperature:
116 -** Storage: -55 ~~ +125℃
117 -** Operating: -40 ~~ +85℃
118 -* Humidity:
119 -** Storage: 5 ~~ 95% (Non-Condensing)
120 -** Operating: 10 ~~ 95% (Non-Condensing)
121 -* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
122 -* LoRa Rx current: <9 mA
123 -* I/O Voltage: 3.3v
64 +[[image:image-20220517072821-2.png]]
124 124  
125 -== 2.4  Pin Mapping & LED ==
126 126  
67 +== Part Number ==
127 127  
69 +Part Number: **LA66-XXX**
128 128  
129 -== 2.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
71 +**XX**: The default frequency band
130 130  
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
131 131  
82 += LA66 LoRaWAN Shield =
132 132  
133 -== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
84 +LA66 LoRaWAN Shield is the Arduino Breakout PCB to fast test the features of LA66 module and turn Arduino to support LoRaWAN.
134 134  
86 +== Pin Mapping & LED ==
135 135  
88 +== Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
136 136  
137 -== 2.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
90 +== Example: Join TTN network and send an uplink message, get downlink message. ==
138 138  
92 +== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
139 139  
94 +== Upgrade Firmware of LA66 LoRaWAN Shield ==
140 140  
141 -== 2.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
96 +=== what needs to be used ===
142 142  
98 +1.LA66 LoRaWAN Shield that needs to be upgraded
143 143  
144 -=== 2.8.1  Items needed for update ===
100 +2.Arduino
145 145  
146 -1. LA66 LoRaWAN Shield
147 -1. Arduino
148 -1. USB TO TTL Adapter
102 +3.USB TO TTL
149 149  
150 -[[image:image-20220602100052-2.png||height="385" width="600"]]
104 +[[image:image-20220602100052-2.png]]
151 151  
106 +=== Wiring Schematic ===
152 152  
153 -=== 2.8.2  Connection ===
108 +[[image:image-20220602101311-3.png]]
154 154  
110 +LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
155 155  
156 -[[image:image-20220602101311-3.png||height="276" width="600"]]
112 +GND  >>>>>>>>>>>>GND
157 157  
114 +TXD  >>>>>>>>>>>>TXD
158 158  
159 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
116 +RXD  >>>>>>>>>>>>RXD
160 160  
118 +JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
161 161  
162 -(% style="background-color:yellow" %)**GND  <-> GND
163 -TXD  <->  TXD
164 -RXD  <->  RXD**
120 +Connect to the PC after connecting the wires
165 165  
122 +[[image:image-20220602102240-4.png]]
166 166  
167 -Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)
124 +=== Upgrade steps ===
168 168  
169 -Connect USB TTL Adapter to PC after connecting the wires
126 +==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
170 170  
128 +[[image:image-20220602102824-5.png]]
171 171  
172 -[[image:image-20220602102240-4.png||height="304" width="600"]]
130 +==== Press the RST switch on the LA66 LoRaWAN Shield once ====
173 173  
132 +[[image:image-20220602104701-12.png]]
174 174  
175 -=== 2.8.3  Upgrade steps ===
134 +==== Open the upgrade application software ====
176 176  
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/]]
177 177  
178 -==== 1.  Switch SW1 to put in ISP position ====
179 -
180 -
181 -[[image:image-20220602102824-5.png||height="306" width="600"]]
182 -
183 -
184 -==== 2.  Press the RST switch once ====
185 -
186 -[[image:image-20220602104701-12.png||height="285" width="600"]]
187 -
188 -
189 -==== 3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ====
190 -
191 -
192 -(% style="color:blue" %)**1. 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/]]**
193 -
194 -
195 195  [[image:image-20220602103227-6.png]]
196 196  
197 -
198 198  [[image:image-20220602103357-7.png]]
199 199  
142 +===== Select the COM port corresponding to USB TTL =====
200 200  
201 -
202 -(% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %)
203 -(% style="color:blue" %)**2. Select the COM port corresponding to USB TTL**
204 -
205 -
206 206  [[image:image-20220602103844-8.png]]
207 207  
146 +===== Select the bin file to burn =====
208 208  
209 -
210 -(% class="wikigeneratedid" id="HSelectthebinfiletoburn" %)
211 -(% style="color:blue" %)**3. Select the bin file to burn**
212 -
213 -
214 214  [[image:image-20220602104144-9.png]]
215 215  
216 -
217 217  [[image:image-20220602104251-10.png]]
218 218  
219 -
220 220  [[image:image-20220602104402-11.png]]
221 221  
154 +===== Click to start the download =====
222 222  
223 -
224 -(% class="wikigeneratedid" id="HClicktostartthedownload" %)
225 -(% style="color:blue" %)**4. Click to start the download**
226 -
227 227  [[image:image-20220602104923-13.png]]
228 228  
158 +===== The following figure appears to prove that the burning is in progress =====
229 229  
230 -(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
231 -(% style="color:blue" %)**5. Check update process**
232 -
233 -
234 234  [[image:image-20220602104948-14.png]]
235 235  
162 +===== The following picture appears to prove that the burning is successful =====
236 236  
237 -
238 -(% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %)
239 -(% style="color:blue" %)**The following picture shows that the burning is successful**
240 -
241 241  [[image:image-20220602105251-15.png]]
242 242  
166 += LA66 USB LoRaWAN Adapter =
243 243  
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.
244 244  
245 -= 3.  LA66 USB LoRaWAN Adapter =
170 +Before use, please make sure that the computer has installed the CP2102 driver
246 246  
172 +== Pin Mapping & LED ==
247 247  
248 -== 3.1  Overview ==
174 +== Example Send & Get Messages via LoRaWAN in PC ==
249 249  
250 -LA66 USB LoRaWAN Adapter is designed to fast turn USB devices to support LoRaWAN wireless features. It combines a CP2101 USB TTL Chip and LA66 LoRaWAN module which can easy to add LoRaWAN wireless feature to PC / Mobile phone or an embedded device that has USB Interface.
176 +Connect the LA66 LoRa Shield to the PC
251 251  
178 +[[image:image-20220602171217-1.png||height="615" width="915"]]
252 252  
253 -== 3.2  Features ==
254 -
255 -* LoRaWAN USB adapter base on LA66 LoRaWAN module
256 -* Ultra-long RF range
257 -* Support LoRaWAN v1.0.4 protocol
258 -* Support peer-to-peer protocol
259 -* TCXO crystal to ensure RF performance on low temperature
260 -* Spring RF antenna
261 -* Available in different frequency LoRaWAN frequency bands.
262 -* World-wide unique OTAA keys.
263 -* AT Command via UART-TTL interface
264 -* Firmware upgradable via UART interface
265 -
266 -== 3.3  Specification ==
267 -
268 -* CPU: 32-bit 48 MHz
269 -* Flash: 256KB
270 -* RAM: 64KB
271 -* Input Power Range: 5v
272 -* Frequency Range: 150 MHz ~~ 960 MHz
273 -* Maximum Power +22 dBm constant RF output
274 -* High sensitivity: -148 dBm
275 -* Temperature:
276 -** Storage: -55 ~~ +125℃
277 -** Operating: -40 ~~ +85℃
278 -* Humidity:
279 -** Storage: 5 ~~ 95% (Non-Condensing)
280 -** Operating: 10 ~~ 95% (Non-Condensing)
281 -* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
282 -* LoRa Rx current: <9 mA
283 -
284 -== 3.4  Pin Mapping & LED ==
285 -
286 -
287 -
288 -== 3.5  Example: Send & Get Messages via LoRaWAN in PC ==
289 -
290 -
291 -Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
292 -
293 -
294 -(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC**
295 -
296 -
297 -[[image:image-20220602171217-1.png||height="538" width="800"]]
298 -
299 -
300 300  Open the serial port tool
301 301  
302 302  [[image:image-20220602161617-8.png]]
303 303  
304 -[[image:image-20220602161718-9.png||height="457" width="800"]]
184 +[[image:image-20220602161718-9.png||height="529" width="927"]]
305 305  
186 +Press the reset switch RST on the LA66 LoRa Shield.
306 306  
188 +The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
307 307  
308 -(% style="color:blue" %)**2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it.**
190 +[[image:image-20220602161935-10.png]]
309 309  
310 -The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully Join the LoRaWAN network
192 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
311 311  
312 -
313 -[[image:image-20220602161935-10.png||height="498" width="800"]]
314 -
315 -
316 -
317 -(% style="color:blue" %)**3. See Uplink Command**
318 -
319 -Command format: (% style="color:#4472c4" %)** AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>**
320 -
321 321  example: AT+SENDB=01,02,8,05820802581ea0a5
322 322  
323 -[[image:image-20220602162157-11.png||height="497" width="800"]]
196 +[[image:image-20220602162157-11.png]]
324 324  
198 +Check to see if TTN received the message
325 325  
200 +[[image:image-20220602162331-12.png||height="547" width="1044"]]
326 326  
327 -(% style="color:blue" %)**4. Check to see if TTN received the message**
202 +== Example Send & Get Messages via LoRaWAN in RPi ==
328 328  
329 -[[image:image-20220602162331-12.png||height="420" width="800"]]
204 +Connect the LA66 LoRa Shield to the RPI
330 330  
206 +[[image:image-20220602171233-2.png||height="592" width="881"]]
331 331  
208 +Log in to the RPI's terminal and connect to the serial port
332 332  
333 -== 3.6  Example: Send PC's CPU/RAM usage to TTN via python ==
210 +[[image:image-20220602153146-3.png]]
334 334  
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
335 335  
336 -**Use python as an example:**[[https:~~/~~/github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py>>https://github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py]]
215 +[[image:image-20220602154928-5.png]]
337 337  
217 +send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
338 338  
339 -(% style="color:red" %)**Preconditions:**
340 -
341 -(% style="color:red" %)**1. LA66 USB LoRaWAN Adapter works fine**
342 -
343 -(% style="color:red" %)**2. LA66 USB LoRaWAN Adapter  is registered with TTN**
344 -
345 -
346 -
347 -(% style="color:blue" %)**Steps for usage:**
348 -
349 -(% style="color:blue" %)**1.**(%%) Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
350 -
351 -(% style="color:blue" %)**2.**(%%) Run the python script in PC and see the TTN
352 -
353 -[[image:image-20220602115852-3.png||height="450" width="1187"]]
354 -
355 -
356 -
357 -== 3.7  Example: Send & Get Messages via LoRaWAN in RPi ==
358 -
359 -
360 -Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
361 -
362 -
363 -(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi**
364 -
365 -[[image:image-20220602171233-2.png||height="538" width="800"]]
366 -
367 -
368 -
369 -(% style="color:blue" %)**2. Install Minicom in RPi.**
370 -
371 -(% id="cke_bm_509388S" style="display:none" %) (%%)Enter the following command in the RPi terminal
372 -
373 - (% style="background-color:yellow" %)**apt update**
374 -
375 - (% style="background-color:yellow" %)**apt install minicom**
376 -
377 -
378 -Use minicom to connect to the RPI's terminal
379 -
380 -[[image:image-20220602153146-3.png||height="439" width="500"]]
381 -
382 -
383 -
384 -(% style="color:blue" %)**3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter.**(%%)
385 -(% style="color:blue" %)The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network
386 -
387 -[[image:image-20220602154928-5.png||height="436" width="500"]]
388 -
389 -
390 -
391 -(% style="color:blue" %)**4. Send Uplink message**
392 -
393 -Format: (% style="color:#4472c4" %)**AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>**
394 -
395 395  example: AT+SENDB=01,02,8,05820802581ea0a5
396 396  
221 +[[image:image-20220602160339-6.png]]
397 397  
398 -[[image:image-20220602160339-6.png||height="517" width="600"]]
399 -
400 -
401 -
402 402  Check to see if TTN received the message
403 403  
404 -[[image:image-20220602160627-7.png||height="369" width="800"]]
225 +[[image:image-20220602160627-7.png||height="468" width="1013"]]
405 405  
227 +=== Install Minicom ===
406 406  
229 +Enter the following command in the RPI terminal
407 407  
408 -== 3.8  Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
231 +apt update
409 409  
233 +[[image:image-20220602143155-1.png]]
410 410  
235 +apt install minicom
411 411  
412 -== 3.9  Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
237 +[[image:image-20220602143744-2.png]]
413 413  
239 +=== Send PC's CPU/RAM usage to TTN via script. ===
414 414  
241 +==== Take python as an example: ====
415 415  
243 +===== Preconditions: =====
416 416  
417 -= 4.  Order Info =
245 +1.LA66 USB LoRaWAN Adapter works fine
418 418  
247 +2.LA66 USB LoRaWAN Adapter  is registered with TTN
419 419  
420 -**Part Number:**  (% style="color:blue" %)**LA66-XXX**(%%), (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%) **or**  (% style="color:blue" %)**LA66-USB-LoRaWAN-Adapter-XXX**
249 +===== Steps for usage =====
421 421  
251 +1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
422 422  
423 -(% style="color:blue" %)**XXX**(%%): The default frequency band
253 +2.Run the script and see the TTN
424 424  
425 -* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
426 -* (% style="color:red" %)**AU915**(%%):  LoRaWAN AU915 band
427 -* (% style="color:red" %)**EU433**(%%):  LoRaWAN EU433 band
428 -* (% style="color:red" %)**EU868**(%%):  LoRaWAN EU868 band
429 -* (% style="color:red" %)**KR920**(%%):  LoRaWAN KR920 band
430 -* (% style="color:red" %)**US915**(%%):  LoRaWAN US915 band
431 -* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
432 -* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
433 -* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
255 +[[image:image-20220602115852-3.png]]
434 434  
435 435  
436 436  
259 +== Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
437 437  
438 -= 5.  Reference =
439 439  
440 -* Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
262 +== Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
441 441  
442 442  
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