Wiki source code of Check List for UART access issue -- STM32
Hide last authors
| author | version | line-number | content |
|---|---|---|---|
 |
1.3 | 1 | = 1. Introduction = |
| |
1.1 | 2 | |
| |
1.3 | 3 | This chapter describe the checklist for not able to access to AT Command in Dragino LoRaWAN End Node base on STM32 chip. |
| |
1.1 | 4 | |
| |
1.3 | 5 | = 2. Not able to send AT Command = |
| |
1.1 | 6 | |
| |
1.3 | 7 | * Do you use a USB to TTL Converter? If you use RS232 converter, it won't work |
| 8 | * Can you see the output from console. | ||
| 9 | * Do you use the correct baudrate: | ||
| |
1.1 | 10 | |
| |
1.3 | 11 | {{{** Baudrate: 9600 |
| 12 | ** Data bits: 8 | ||
| 13 | ** Stop bits: 1 | ||
| 14 | ** Parity: None | ||
| 15 | ** Flow control: None | ||
| 16 | }}} | ||
| |
1.1 | 17 | |
| |
1.3 | 18 | * Did you have the hardware RXD pin connected correctly according to the user manual? |
| 19 | * 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: | ||
| |
1.1 | 20 | |
| |
1.3 | 21 | [[image:https://wiki.dragino.com/images/thumb/5/5c/UART_access_1.png/600px-UART_access_1.png||height="419" width="600"]] |
| |
1.1 | 22 | |
| |
1.3 | 23 | Add a new line in some software |
| |
1.1 | 24 | |
| 25 | |||
| |
1.3 | 26 | = 3. If you still not able to fix this issue = |
| |
1.1 | 27 | |
| |
1.3 | 28 | please send us below info at support@dragino.com |
| |
1.1 | 29 | |
| |
1.3 | 30 | * Screen shot for your serial utility baud rate settings. |
| 31 | * Screen shot of your serial console. | ||
| 32 | * A photo shows clearly how you use USB-TTL adapter connect to the device. |