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2	2
3	3	This chapter describe the checklist for not able to access to AT Command in Dragino LoRaWAN End Node base on STM32 chip.
4	4
5		-
6	6	= 2. Not able to send AT Command =
7	7
8	8	* Do you use a USB to TTL Converter? If you use RS232 converter, it won't work
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9	9	* Can you see the output from console.
10	10	* Do you use the correct baudrate:
11	11
12		-(% class="box" %)
13		-(((
14		-~** Baudrate: 9600
15		-~** Data bits: 8
16		-~** Stop bits: 1
17		-~** Parity: None
18		-~** Flow control: None
19		-)))
	11	+{{{** Baudrate: 9600
	12	+** Data bits: 8
	13	+** Stop bits: 1
	14	+** Parity: None
	15	+** Flow control: None
	16	+}}}
20	20
21	21	* Did you have the hardware RXD pin connected correctly according to the user manual?
22	22	* Did you add the **ENTER** and **NEW LINE** after press send. Some serial utility doesn't add them by default. Below is an example for adding new line:
23	23
24		-[[image:image-20220527083416-1.png]]
	21	+[[image:https://wiki.dragino.com/images/thumb/5/5c/UART_access_1.png/600px-UART_access_1.png||height="419" width="600"]]
25	25
26	26	Add a new line in some software
27	27

image-20220527083416-1.png

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