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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||height="533" width="930"]]
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		-[[image:image-20220723172235-7.png||height="480" width="1027"]]
215		-
216	216	== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
217	217
218		-1.Open project
219	219
220		-[[image:image-20220723172502-8.png]]
221	221
222		-2.Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets
223		-
224		-[[image:image-20220723172938-9.png||height="652" width="1050"]]
225		-
226		-
227	227	== 2.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
228	228
229		-1.Open project
230	230
231		-[[image:image-20220723173341-10.png||height="581" width="1014"]]
232	232
233		-2.Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets
234		-
235		-[[image:image-20220723173950-11.png||height="665" width="1012"]]
236		-
237		-
238	238	== 2.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
239	239
240	240

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