SD - write()

Write data to the file.

Syntax

file.write(data)
file.write(buf, len)

Parameters

• file: an instance of the File class (returned by SD.open()).
• data: the byte, char, or string (char *) to write.
• buf: an array of characters or bytes.
• len: the number of elements in buf.

Returns

The number of bytes written, though reading that number is optional.

See also

• name()
• available()
• close()
• flush()
• peek()
• position()
• print()
• println()
• seek()
• size()
• read()
• isDirectory()
• openNextFile()
• rewindDirectory()