Wiki source code of Check List for UART access issue -- STM32
Last modified by Mengting Qiu on 2024/11/11 09:21
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2.7 | 1 | (% class="wikigeneratedid" %) |
| 2 | **Table of Contents:** | ||
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| 4 | {{toc/}} | ||
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1.3 | 7 | = 1. Introduction = |
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1.1 | 8 | |
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2.6 | 9 | |
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1.3 | 10 | This chapter describe the checklist for not able to access to AT Command in Dragino LoRaWAN End Node base on STM32 chip. |
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1.1 | 11 | |
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2.3 | 12 | |
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1.3 | 13 | = 2. Not able to send AT Command = |
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1.1 | 14 | |
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2.6 | 15 | |
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1.3 | 16 | * Do you use a USB to TTL Converter? If you use RS232 converter, it won't work |
| 17 | * Can you see the output from console. | ||
| 18 | * Do you use the correct baudrate: | ||
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2.6 | 19 | ** (% style="color:blue" %)**Baudrate: 9600** |
| 20 | ** (% style="color:blue" %)**Data bits: 8** | ||
| 21 | ** (% style="color:blue" %)**Stop bits: 1** | ||
| 22 | ** (% style="color:blue" %)**Parity: None** | ||
| 23 | ** (% style="color:blue" %)**Flow control: None** | ||
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1.1 | 24 | |
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1.3 | 25 | * Did you have the hardware RXD pin connected correctly according to the user manual? |
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2.8 | 26 | * Did you add the (% style="color:blue" %)**ENTER**(%%) and (% style="color:blue" %)**NEW LINE**(%%) after press send. Some serial utility doesn't add them by default. Below is an example for adding new line: |
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1.1 | 27 | |
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2.2 | 28 | [[image:image-20220527083416-1.png]] |
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1.1 | 29 | |
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1.3 | 30 | Add a new line in some software |
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1.1 | 31 | |
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1.3 | 33 | = 3. If you still not able to fix this issue = |
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1.1 | 34 | |
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2.6 | 35 | |
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1.3 | 36 | please send us below info at support@dragino.com |
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1.1 | 37 | |
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1.3 | 38 | * Screen shot for your serial utility baud rate settings. |
| 39 | * Screen shot of your serial console. | ||
| 40 | * A photo shows clearly how you use USB-TTL adapter connect to the device. |