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62	62	* Firmware upgradable via UART interface
63	63	* Ultra-long RF range
64	64
65		-
66		-
67	67	== 1.3  Specification ==
68	68
69	69	* CPU: 32-bit 48 MHz
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84	84	* LoRa Rx current: <9 mA
85	85	* I/O Voltage: 3.3v
86	86
87		-
88		-
89	89	== 1.4  AT Command ==
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91	91
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128	128	)))
129	129
130	130	(((
131		-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.
	127	+(% 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.
132	132	)))
133	133
134	134	(((
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170	170	* Firmware upgradable via UART interface
171	171	* Ultra-long RF range
172	172
173		-
174		-
175	175	== 2.3  Specification ==
176	176
177	177	* CPU: 32-bit 48 MHz
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192	192	* LoRa Rx current: <9 mA
193	193	* I/O Voltage: 3.3v
194	194
195		-
196		-
197	197	== 2.4  Pin Mapping & LED ==
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219	219	1. Arduino
220	220	1. USB TO TTL Adapter
221	221
222		-
223		-
224	224	[[image:image-20220602100052-2.png||height="385" width="600"]]
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334	334	[[image:image-20220715001142-3.png||height="145" width="220"]]
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	327	+(((
337	337	(% 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.
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339	339	(% 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.
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341	341	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
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343	343	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.
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345	345	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
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389	389	== 3.5  Example: Send & Get Messages via LoRaWAN in PC ==
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392	392	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
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393	393
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395	395	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC**