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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||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	+
195	195	== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
196	196
	218	+1.Open project
197	197
	220	+[[image:image-20220723172502-8.png]]
198	198
	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	+
199	199	== 2.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
200	200
	229	+1.Open project
201	201
	231	+[[image:image-20220723173341-10.png||height="581" width="1014"]]
202	202
	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	+
203	203	== 2.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
204	204
205	205

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