Summary

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Details

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Title

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1		-LA66 LoRaWAN Module
	1	+LA66 LoRaWAN Shield User Manual

Content

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6	6
7	7
8	8
9		-= 1.  LA66 LoRaWAN Module =
10	10
	10	+= 1.  LA66 LoRaWAN Shield =
11	11
12		-== 1.1  What is LA66 LoRaWAN Module ==
13	13
	13	+== 1.1  Overview ==
14	14
	15	+
15	15	(((
16		-[[image:image-20220715000242-1.png||height="110" width="132"]]
	17	+[[image:image-20220715000826-2.png||height="145" width="220"]]
	18	+)))
17	17
18		-(% 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.
	20	+(((
	21	+
19	19	)))
20	20
21	21	(((
22		-(% 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.
	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.
23	23	)))
24	24
25	25	(((
	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	+(((
26	26	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
27	27	)))
	38	+)))
28	28
29	29	(((
	41	+(((
30	30	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.
31	31	)))
	44	+)))
32	32
33	33	(((
	47	+(((
34	34	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
35	35	)))
	50	+)))
36	36
37	37
	53	+
38	38	== 1.2  Features ==
39	39
	56	+
	57	+* Arduino Shield base on LA66 LoRaWAN module
40	40	* Support LoRaWAN v1.0.4 protocol
41	41	* Support peer-to-peer protocol
42	42	* TCXO crystal to ensure RF performance on low temperature
43		-* SMD Antenna pad and i-pex antenna connector
	61	+* SMA connector
44	44	* Available in different frequency LoRaWAN frequency bands.
45	45	* World-wide unique OTAA keys.
46	46	* AT Command via UART-TTL interface
...	...	@@ -49,8 +49,10 @@
49	49
50	50
51	51
	70	+
52	52	== 1.3  Specification ==
53	53
	73	+
54	54	* CPU: 32-bit 48 MHz
55	55	* Flash: 256KB
56	56	* RAM: 64KB
...	...	@@ -72,114 +72,108 @@
72	72
73	73
74	74
75		-== 1.4  AT Command ==
	95	+== 1.4  Pin Mapping & LED ==
76	76
77	77
78		-AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
	98	+[[image:image-20220814101457-1.png||height="553" width="761"]]
79	79
	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
80	80
81		-== 1.5  Dimension ==
82	82
83		-[[image:image-20220718094750-3.png]]
84	84
	106	+== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
85	85
86	86
	109	+**Show connection diagram：**
87	87
88		-== 1.6  Pin Mapping ==
89	89
	112	+[[image:image-20220723170210-2.png||height="908" width="681"]]
90	90
91		-[[image:image-20220523101537-1.png]]
92	92
93	93
	116	+(% style="color:blue" %)**1.  open Arduino IDE**
94	94
95		-== 1.7  Land Pattern ==
96	96
97		-[[image:image-20220517072821-2.png]]
	119	+[[image:image-20220723170545-4.png]]
98	98
99	99
100	100
101		-= 2.  LA66 LoRaWAN Shield =
	123	+(% style="color:blue" %)**2.  Open project**
102	102
103	103
104		-== 2.1  Overview ==
	126	+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]]
105	105
	128	+[[image:image-20220726135239-1.png]]
106	106
107		-[[image:image-20220715000826-2.png||height="386" width="449"]]
108	108
	131	+(% 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**
109	109
110		-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.
	133	+[[image:image-20220726135356-2.png]]
111	111
112		-(((
113		-(% 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.
114		-)))
115	115
116		-(((
117		-Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
118		-)))
	136	+(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
119	119
120		-(((
121		-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.
122		-)))
123	123
124		-(((
125		-LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
126		-)))
	139	+[[image:image-20220723172235-7.png||height="480" width="1027"]]
127	127
128	128
129		-== 2.2  Features ==
130	130
131		-* Arduino Shield base on LA66 LoRaWAN module
132		-* Support LoRaWAN v1.0.4 protocol
133		-* Support peer-to-peer protocol
134		-* TCXO crystal to ensure RF performance on low temperature
135		-* SMA connector
136		-* Available in different frequency LoRaWAN frequency bands.
137		-* World-wide unique OTAA keys.
138		-* AT Command via UART-TTL interface
139		-* Firmware upgradable via UART interface
140		-* Ultra-long RF range
	143	+== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
141	141
142		-== 2.3  Specification ==
143	143
144		-* CPU: 32-bit 48 MHz
145		-* Flash: 256KB
146		-* RAM: 64KB
147		-* Input Power Range: 1.8v ~~ 3.7v
148		-* Power Consumption: < 4uA.
149		-* Frequency Range: 150 MHz ~~ 960 MHz
150		-* Maximum Power +22 dBm constant RF output
151		-* High sensitivity: -148 dBm
152		-* Temperature:
153		-** Storage: -55 ~~ +125℃
154		-** Operating: -40 ~~ +85℃
155		-* Humidity:
156		-** Storage: 5 ~~ 95% (Non-Condensing)
157		-** Operating: 10 ~~ 95% (Non-Condensing)
158		-* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
159		-* LoRa Rx current: <9 mA
160		-* I/O Voltage: 3.3v
	146	+(% style="color:blue" %)**1.  Open project**
161	161
162		-== 2.4  Pin Mapping & LED ==
163	163
	149	+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]]
164	164
165	165
166		-== 2.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
	152	+[[image:image-20220723172502-8.png]]
167	167
168	168
169	169
170		-== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
	156	+(% 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**
171	171
172	172
	159	+[[image:image-20220723172938-9.png||height="652" width="1050"]]
173	173
174		-== 2.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
175	175
176	176
	163	+== 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED. ==
177	177
178		-== 2.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
179	179
	166	+(% style="color:blue" %)**1.  Open project**
180	180
181		-=== 2.8.1  Items needed for update ===
182	182
	169	+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]]
	170	+
	171	+
	172	+[[image:image-20220723173341-10.png||height="581" width="1014"]]
	173	+
	174	+
	175	+
	176	+(% 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**
	177	+
	178	+
	179	+[[image:image-20220723173950-11.png||height="665" width="1012"]]
	180	+
	181	+
	182	+
	183	+(% style="color:blue" %)**3.  Integration into Node-red via TTNV3**
	184	+
	185	+For the usage of Node-RED, please refer to: [[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/Node-RED/>>http://8.211.40.43:8080/xwiki/bin/view/Main/Node-RED/]]
	186	+
	187	+[[image:image-20220723175700-12.png||height="602" width="995"]]
	188	+
	189	+
	190	+
	191	+== 1.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
	192	+
	193	+
	194	+=== 1.8.1  Items needed for update ===
	195	+
	196	+
183	183	1. LA66 LoRaWAN Shield
184	184	1. Arduino
185	185	1. USB TO TTL Adapter
...	...	@@ -187,9 +187,10 @@
187	187	[[image:image-20220602100052-2.png||height="385" width="600"]]
188	188
189	189
190		-=== 2.8.2  Connection ===
191	191
	205	+=== 1.8.2  Connection ===
192	192
	207	+
193	193	[[image:image-20220602101311-3.png||height="276" width="600"]]
194	194
195	195
...	...	@@ -212,10 +212,11 @@
212	212	[[image:image-20220602102240-4.png||height="304" width="600"]]
213	213
214	214
	230	+
215	215	=== 2.8.3  Upgrade steps ===
216	216
217	217
218		-==== 1.  Switch SW1 to put in ISP position ====
	234	+==== (% style="color:blue" %)1.  Switch SW1 to put in ISP position(%%) ====
219	219
220	220
221	221	[[image:image-20220602102824-5.png||height="306" width="600"]]
...	...	@@ -222,7 +222,7 @@
222	222
223	223
224	224
225		-==== 2.  Press the RST switch once ====
	241	+==== (% style="color:blue" %)2.  Press the RST switch once(%%) ====
226	226
227	227
228	228	[[image:image-20220602104701-12.png||height="285" width="600"]]
...	...	@@ -229,7 +229,7 @@
229	229
230	230
231	231
232		-==== 3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ====
	248	+==== (% style="color:blue" %)3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade(%%) ====
233	233
234	234
235	235	(((
...	...	@@ -293,21 +293,35 @@
293	293
294	294	== 3.1  Overview ==
295	295
	312	+
296	296	[[image:image-20220715001142-3.png||height="145" width="220"]]
297	297
	315	+
	316	+(((
298	298	(% style="color:blue" %)**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.
	318	+)))
299	299
300		-(% 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.
	320	+(((
	321	+(% 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.
	322	+)))
301	301
	324	+(((
302	302	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
	326	+)))
303	303
	328	+(((
304	304	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.
	330	+)))
305	305
	332	+(((
306	306	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
	334	+)))
307	307
308	308
	337	+
309	309	== 3.2  Features ==
310	310
	340	+
311	311	* LoRaWAN USB adapter base on LA66 LoRaWAN module
312	312	* Ultra-long RF range
313	313	* Support LoRaWAN v1.0.4 protocol
...	...	@@ -322,6 +322,7 @@
322	322
323	323	== 3.3  Specification ==
324	324
	355	+
325	325	* CPU: 32-bit 48 MHz
326	326	* Flash: 256KB
327	327	* RAM: 64KB
...	...	@@ -340,18 +340,21 @@
340	340
341	341	== 3.4  Pin Mapping & LED ==
342	342
	374	+[[image:image-20220813183239-3.png||height="526" width="662"]]
343	343
344	344
345	345	== 3.5  Example: Send & Get Messages via LoRaWAN in PC ==
346	346
347	347
	380	+(((
348	348	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
	382	+)))
349	349
350	350
351	351	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC**
352	352
353	353
354		-[[image:image-20220602171217-1.png||height="538" width="800"]]
	388	+[[image:image-20220723100027-1.png]]
355	355
356	356
357	357	Open the serial port tool
...	...	@@ -392,6 +392,7 @@
392	392
393	393	**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]]
394	394
	429	+(**Raspberry Pi example: **[[https:~~/~~/github.com/dragino/LA66/blob/main/Send_information_to_TTN_Raspberry%20Pi.py>>https://github.com/dragino/LA66/blob/main/Send_information_to_TTN_Raspberry%20Pi.py]])
395	395
396	396	(% style="color:red" %)**Preconditions:**
397	397
...	...	@@ -419,7 +419,7 @@
419	419
420	420	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi**
421	421
422		-[[image:image-20220602171233-2.png||height="538" width="800"]]
	457	+[[image:image-20220723100439-2.png]]
423	423
424	424
425	425
...	...	@@ -464,18 +464,136 @@
464	464
465	465
466	466
467		-== 3.8  Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
	502	+== 3.8  Example: Use of LA66 USB LoRaWAN Adapter and mobile APP ==
468	468
469	469
	505	+=== 3.8.1  Hardware and Software Connection ===
470	470
	507	+
	508	+==== (% style="color:blue" %)**Overview：**(%%) ====
	509	+
	510	+
	511	+(((
	512	+DRAGINO-LA66-APP is an Open Source mobile APP for LA66 USB LoRaWAN Adapter. DRAGINO-LA66-APP has below features:
	513	+
	514	+* Send real-time location information of mobile phone to LoRaWAN network.
	515	+* Check LoRaWAN network signal strengh.
	516	+* Manually send messages to LoRaWAN network.
	517	+)))
	518	+
	519	+
	520	+
	521	+==== (% style="color:blue" %)**Hardware Connection:**(%%) ====
	522	+
	523	+A USB to Type-C adapter is needed to connect to a Mobile phone.
	524	+
	525	+Note: The package of LA66 USB adapter already includes this USB Type-C adapter.
	526	+
	527	+[[image:image-20220813174353-2.png||height="360" width="313"]]
	528	+
	529	+
	530	+==== (% style="color:blue" %)**Download and Install App:**(%%) ====
	531	+
	532	+[[(% id="cke_bm_895007S" style="display:none" %)** **(%%)**Download Link for Android apk **>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]].  (Android Version Only)
	533	+
	534	+[[image:image-20220813173738-1.png]]
	535	+
	536	+
	537	+==== (% style="color:blue" %)**Use of APP:**(%%) ====
	538	+
	539	+Function and page introduction
	540	+
	541	+[[image:image-20220723113448-7.png||height="995" width="450"]]
	542	+
	543	+**Block Explain:**
	544	+
	545	+1.  Display LA66 USB LoRaWAN Module connection status
	546	+
	547	+2.  Check and reconnect
	548	+
	549	+3.  Turn send timestamps on or off
	550	+
	551	+4.  Display LoRaWan connection status
	552	+
	553	+5.  Check LoRaWan connection status
	554	+
	555	+6.  The RSSI value of the node when the ACK is received
	556	+
	557	+7.  Node's Signal Strength Icon
	558	+
	559	+8.  Configure Location Uplink Interval
	560	+
	561	+9.  AT command input box
	562	+
	563	+10.  Send Button:  Send input box info to LA66 USB Adapter
	564	+
	565	+11.  Output Log from LA66 USB adapter
	566	+
	567	+12.  clear log button
	568	+
	569	+13.  exit button
	570	+
	571	+
	572	+LA66 USB LoRaWAN Module not connected
	573	+
	574	+[[image:image-20220723110520-5.png||height="677" width="508"]]
	575	+
	576	+
	577	+
	578	+Connect LA66 USB LoRaWAN Module
	579	+
	580	+[[image:image-20220723110626-6.png||height="681" width="511"]]
	581	+
	582	+
	583	+
	584	+=== 3.8.2 Send data to TTNv3 and plot location info in Node-Red ===
	585	+
	586	+
	587	+(% style="color:blue" %)**1.  Register LA66 USB LoRaWAN Module to TTNV3**
	588	+
	589	+[[image:image-20220723134549-8.png]]
	590	+
	591	+
	592	+
	593	+(% style="color:blue" %)**2.  Open Node-RED,And import the JSON file to generate the flow**
	594	+
	595	+Sample JSON file please go to **[[this link>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]]** to download.
	596	+
	597	+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/]]
	598	+
	599	+After see LoRaWAN Online, walk around and the APP will keep sending location info to LoRaWAN server and then to the Node Red.
	600	+
	601	+
	602	+Example output in NodeRed is as below:
	603	+
	604	+[[image:image-20220723144339-1.png]]
	605	+
	606	+
	607	+
471	471	== 3.9  Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
472	472
473	473
	611	+The LA66 USB LoRaWAN Adapter is the same as the LA66 LoRaWAN Shield update method
474	474
	613	+Just use the yellow jumper cap to short the BOOT corner and the RX corner, and then press the RESET button (without the jumper cap, you can directly short the BOOT corner and the RX corner with a wire to achieve the same effect)
475	475
476		-= 4.  Order Info =
	615	+[[image:image-20220723150132-2.png]]
477	477
478	478
	618	+
	619	+= 4.  FAQ =
	620	+
	621	+
	622	+== 4.1  How to Compile Source Code for LA66? ==
	623	+
	624	+
	625	+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]]
	626	+
	627	+
	628	+
	629	+= 5.  Order Info =
	630	+
	631	+
479	479	**Part Number:**  (% style="color:blue" %)**LA66-XXX**(%%), (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%) **or**  (% style="color:blue" %)**LA66-USB-LoRaWAN-Adapter-XXX**
480	480
481	481
...	...	@@ -491,8 +491,7 @@
491	491	* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
492	492	* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
493	493
494		-= 5.  Reference =
	647	+= 6.  Reference =
495	495
496		-* Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
497	497
498		-
	650	+* Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]

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