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102	102	* Firmware upgradable via UART interface
103	103	* Ultra-long RF range
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	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
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	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)
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181	181	[[image:image-20220602102824-5.png||height="306" width="600"]]
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	187	+
184	184	==== 2.  Press the RST switch once ====
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	190	+
186	186	[[image:image-20220602104701-12.png||height="285" width="600"]]
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	194	+
189	189	==== 3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ====
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227	227	[[image:image-20220602104923-13.png]]
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	236	+
230	230	(% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %)
231	231	(% style="color:blue" %)**5. Check update process**
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263	263	* AT Command via UART-TTL interface
264	264	* Firmware upgradable via UART interface
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	273	+
	274	+
266	266	== 3.3  Specification ==
267	267
268	268	* CPU: 32-bit 48 MHz
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281	281	* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
282	282	* LoRa Rx current: <9 mA
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	293	+
	294	+
284	284	== 3.4  Pin Mapping & LED ==
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