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184	184	* LoRa Rx current: <9 mA
185	185	* I/O Voltage: 3.3v
186	186
187		-== 2.4  Pin Mapping & LED ==
	187	+== 2.4  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
189	189
190	190
191	191	== 2.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
192	192
	196	+Show connection diagram：
193	193
	198	+[[image:image-20220723170210-2.png||height="908" width="681"]]
194	194
	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	+
195	195	== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
196	196
197	197

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