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54	54	[[image:image-20220530002453-3.png||height="262" width="493"]]
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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		-= FAQ =
82		-
83		-== How to change the LoRa Frequency Bands/Region ==
84		-
85		-You can follow the instruction here: [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome||anchor="H2.HardwareUpgradeMethodSupportList"]].
86		-When downloading the images, choose the required image file for download. ​
87		-
88		-
89		-= Trouble Shooting =
90		-
91		-== AT Commands input doesn’t work ==
92		-
93		-In case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while pressing the send key, user need to add ENTER in their string.
94		-
95		-
96		-
97	97	= Order Info =
98	98
99	99	Part Number: **GROPOINT AIR-M-XX**
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109	109	* **IN865**: LoRaWAN IN865 band
110	110	* **CN470**: LoRaWAN CN470 band
111	111
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112	112	= ​Packing Info =
113	113
114	114	**Package Includes:  **
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115	115
116	116	* GroPoint Air-M x 1
117	117
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118	118	**Dimension and weight:**
119	119
120	120	* Device Size: cm
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122	122	* Package Size / pcs : cm
123	123	* Weight / pcs : g
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