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62	62	* Firmware upgradable via UART interface
63	63	* Ultra-long RF range
64	64
	65	+
	66	+
65	65	== 1.3  Specification ==
66	66
67	67	* CPU: 32-bit 48 MHz
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82	82	* LoRa Rx current: <9 mA
83	83	* I/O Voltage: 3.3v
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	87	+
	88	+
85	85	== 1.4  AT Command ==
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87	87
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124	124	)))
125	125
126	126	(((
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.
	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.
128	128	)))
129	129
130	130	(((
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166	166	* Firmware upgradable via UART interface
167	167	* Ultra-long RF range
168	168
	173	+
	174	+
169	169	== 2.3  Specification ==
170	170
171	171	* CPU: 32-bit 48 MHz
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186	186	* LoRa Rx current: <9 mA
187	187	* I/O Voltage: 3.3v
188	188
	195	+
	196	+
189	189	== 2.4  Pin Mapping & LED ==
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191	191
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211	211	1. Arduino
212	212	1. USB TO TTL Adapter
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214	214	[[image:image-20220602100052-2.png||height="385" width="600"]]
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324	324	[[image:image-20220715001142-3.png||height="145" width="220"]]
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327		-(((
328	328	(% 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.
329		-)))
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332	332	(% 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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335		-(((
336	336	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
337		-)))
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339		-(((
340	340	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.
341		-)))
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343		-(((
344	344	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
345		-)))
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389	389	== 3.5  Example: Send & Get Messages via LoRaWAN in PC ==
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392		-(((
393	393	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
394		-)))
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397	397	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC**