AT commands are simple text commands that can be sent over serial connections to various electronic chips that conform to AT command instructions. Historically, the AT commands set is also known as the Hayes command set.
These commands were originally developed by Dennis Hayes. Dennis Hayes was the founder of Hayes microcomputer products that specialized in manufacturing modems. Since then, AT commands have become the popular choice among communication device manufacturers for sending commands to embedded communication software in the integrated chips:
|
AT command |
Description |
|
AT |
This is the most basic AT command; its purpose is to ping a modem device. If the modem device is working correctly, then the response OK will be received from the modem. |
|
AT+CMGF=1 |
This command is to set the SMS format to ASCII characters. |
|
AT+CMGS="1234567890"... |
