APPD

Description

Opens a file for writing and sets the file pointer behind the last byte, therewith, subsequent write operations can append data to the end of the file
The first argument is an arbitrary number in the range from 1 to 100, that is used as file handle.
The second argument must be the name of an existing file.

Parameters

This command needs 2 arguments

1. A file handle
2. The name of a file

Return value

ERR_OK (0) - if command is accepted
ERR_ARGUMENT (4) - if there's aproblem with the arguments
ERR_ID_USED (27) - if the given file handle is already in use
ERR_FILE_OPEN (32) - if the file is already open
ERR_FIL_EXHAUSTED (26) - if the system can't allocate a new file control block
ERR_FR_XXX (13...25) - on internal file system errors

Example

APPD 1 hello.txt

Remarks

This command only exists on modules with storage functionality (such as SD-card or USB frash drive).