Go to the AT command (0)-Overview

Go to the AT command (0)-Overview

AT is Attention. The AT command set is sent from TE (Terminal Equipment) or DTE (Data Terminal Equipment) to TA (Terminal Adapter) or DCE (Data Circuit Terminating Equipment. send AT commands via TA and TE to control the MS (Mobile Station) function and interact with GSM network services. you can use the AT command to control calls, text messages, phone books, data services, supplementary services, and faxes.
No parameter command. It is a simple command in the format of AT [+ | &] <command>, such as starting the system and displaying the list of current settings:
Query Command (also known as Read Command). It is used to query the value currently set for this command. The format is AT [+ | &] <command> ?, For example:
Help Command (also called Test Command). It is used to list the possible parameters of the command. The format is AT [+ | &] <command >= ?, For example:
Command with parameters (also called Execute Command). It is the most widely used format and provides powerful flexibility for commands. The format is AT [+ | &] <command >=< par1>, <par2>, <par3>...

Note: Terms