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184	184	* LoRa Rx current: <9 mA
185	185	* I/O Voltage: 3.3v
186	186
187		-== 2.4  LED ==
	187	+== 2.4  Pin Mapping & LED ==
188	188
189		-~1. The LED lights up red when there is an upstream data packet
190		-2. When the network is successfully connected, the green light will be on for 5 seconds
191		-3. Purple light on when receiving downlink data packets
192	192
193	193
194	194	== 2.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
195	195
196		-Show connection diagram：
197	197
198		-[[image:image-20220723170210-2.png||height="908" width="681"]]
199	199
200		-1.open Arduino IDE
201		-
202		-[[image:image-20220723170545-4.png]]
203		-
204		-2.Open project
205		-
206		-[[image:image-20220723170750-5.png]]
207		-
208		-3.Click the button marked 1 in the figure to compile, and after the compilation is complete, click the button marked 2 in the figure to upload
209		-
210		-[[image:image-20220723171228-6.png]]
211		-
212		-4.After the upload is successful, open the serial port monitoring and send the AT command
213		-
214		-
215	215	== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
216	216
217	217

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