Check List for UART access issue -- STM32
Last modified by Xiaoling on 2022/07/13 17:54
Table of Contents:
1. Introduction
This chapter describe the checklist for not able to access to AT Command in Dragino LoRaWAN End Node base on STM32 chip.
2. Not able to send AT Command
- Do you use a USB to TTL Converter? If you use RS232 converter, it won't work
- Can you see the output from console.
- Do you use the correct baudrate:
- Baudrate: 9600
- Data bits: 8
- Stop bits: 1
- Parity: None
- Flow control: None
- Did you have the hardware RXD pin connected correctly according to the user manual?
- 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:
Add a new line in some software
3. If you still not able to fix this issue
please send us below info at support@dragino.com
- Screen shot for your serial utility baud rate settings.
- Screen shot of your serial console.
- A photo shows clearly how you use USB-TTL adapter connect to the device.