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102	102	* Firmware upgradable via UART interface
103	103	* Ultra-long RF range
104	104
	105	+
	106	+
105	105	== 2.3  Specification ==
106	106
107	107	* CPU: 32-bit 48 MHz
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122	122	* LoRa Rx current: <9 mA
123	123	* I/O Voltage: 3.3v
124	124
	127	+
	128	+
125	125	== 2.4  Pin Mapping & LED ==
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127	127
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158	158
159	159	(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%)  **<->** (% style="color:blue" %)**USB TTL**
160	160
161		-
162	162	(% style="background-color:yellow" %)**GND  <-> GND
163		-TXD  <->  TXD
164		-RXD  <->  RXD**
	166	+TXD  <->  TXD
	167	+RXD  <->  RXD**
165	165
166	166
167	167	Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)