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54	54	[[image:image-20220530002453-3.png||height="262" width="493"]]
55	55
56	56
57		-= Use AT Command =
58	58
59		-== Access AT Commands ==
60		-
61		-GroPoint Air supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to GroPoint Air for using AT command, as below.
62		-
63		-[[image:1654593668970-604.png]]
64		-
65		-**Connection:**
66		-
67		-(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
68		-
69		-(% style="background-color:yellow" %)** USB TTL TXD <~-~-~-~-> UART_RXD**
70		-
71		-(% style="background-color:yellow" %)** USB TTL RXD <~-~-~-~-> UART_TXD**
72		-
73		-
74		-In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for GroPoint Air. GroPoint Air will output system info once power on as below:
75		-
76		- [[image:1654653659449-932.png]]
77		-
78		-Valid AT Command please check [[Configure Device>>||anchor="H3.ConfigureLLMS01viaATCommandorLoRaWANDownlink"]].
79		-
80		-
81	81	= FAQ =
82	82
83	83	== How to change the LoRa Frequency Bands/Region ==