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This section provides a list of WIZ550WEB AT commands and their functions. Users can input commands and parameters through USART line. Every command starts with “AT”. Any other initial character will cause an error in return. Commands and parameters are all ASCII characters, i.e. when you input 'AT+NSTAT', you should input ASCII characters 'A', 'T', '+', 'N', 'S', 'T', 'A', 'T' and 'Enter Key' which is CR, LF (0x0d, 0x0A).

Some parameters are mandatory and others are optional. Parameters must be entered in the order of format column given by the command tables. Although the optional parameter is not used, the comma delimiters ',' must still be included in the command. In most cases, valid commands return the character [S] and invalid inputs return [F]. The possible responses sent from WIZ550WEB to the user are described as Responses. Below are examples of user input. As you can see, WIZ550WEB return “\r\n” back instead of “\r”, which means user (host system) always handle '\r\n' as the only delimiter.

Provided basic demo web page of WIZ550web is in tab style of one HTML page (index.html). The configuration and purpose of each tabs are as below.