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12	12	== 1.1  What is LA66 LoRaWAN Module ==
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16	16	(% 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.
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20	20	(% 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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24	24	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
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28	28	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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32	32	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
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36	36	== 1.2  Features ==
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46	46	* Ultra-long RF range
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49		-
50	50	== 1.3  Specification ==
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52	52	* CPU: 32-bit 48 MHz
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68	68	* I/O Voltage: 3.3v
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72	72	== 1.4  AT Command ==
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74	74	AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
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115	115	* Ultra-long RF range
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119	119	== 2.3  Specification ==
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121	121	* CPU: 32-bit 48 MHz
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137	137	* I/O Voltage: 3.3v
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141	141	== 2.4  Pin Mapping & LED ==
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163	163	1. Arduino
164	164	1. USB TO TTL Adapter
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169	169	[[image:image-20220602100052-2.png||height="385" width="600"]]
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178	178	(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
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181	181	(% style="background-color:yellow" %)**GND  <-> GND
182	182	TXD  <->  TXD
183	183	RXD  <->  RXD**
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187	187	Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)
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288	288	* Firmware upgradable via UART interface
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292	292	== 3.3  Specification ==
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294	294	* CPU: 32-bit 48 MHz
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308	308	* LoRa Rx current: <9 mA
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312	312	== 3.4  Pin Mapping & LED ==
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