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71	71	== 1.3  Specification ==
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95	95	== 1.4  Pin Mapping & LED ==
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98	98	[[image:image-20220817085048-1.png]]
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101	101	~1. The LED lights up red when there is an upstream data packet
102	102	2. When the network is successfully connected, the green light will be on for 5 seconds
103	103	3. Purple light on when receiving downlink data packets
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129	129	[[image:image-20220726135239-1.png]]
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132	132	(% style="color:blue" %)**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**
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134	134	[[image:image-20220726135356-2.png]]
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137	137	(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
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340	340	= 4.  Reference =
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