LTE Standard Module Series 2 Description of Audio AT Commands 2.1. AT Commands Introduction 2.1.1. Definitions Carriage return character. Line feed character. Parameter name. Angle brackets do not appear on command line. [...] Optional parameter of a command or an optional part of TA information response. Square brackets do not appear on the command line. When an optional parameter is not given in a command, the new value equals to its previous value or the default settings, unless otherwise specified. Underline Default setting of a parameter. 2.1.2. AT Command Syntax All command lines must start with AT or at and end with .
Information responses and result codes always start and end with a carriage return character and a line feed character: . In tables presenting commands and responses throughout this document, only the commands and responses are presented, and and are deliberately omitted. Table 2: Type of AT Commands and Responses Test Command AT+ =? Test the existence of corresponding Write Command and give information about the type, value, or range of its parameter. Read Command AT+ ? Check the current parameter value of a corresponding Write Command. Write Command AT+ = [, [, [...]]] Set user-definable parameter value.
Execution Command AT+ Return a specific information parameter or perform a specific action. EC200U&EG915U_Series_Audio_Application_Note 7 / 25 Command Type Syntax Description