Table of Contents:

• 1. Introduction
• 2. Not able to send AT Command
• 3. If you still not able to fix this issue

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.