Returns

byte
write() will return the number of bytes written, though reading that number is optional

Write data to the file.

Write data to the file. Note that the data is not physically written to the SD card until the file is closed (with a call to the close() function) or explicitly synced (with the flush() function). If the file was opened in mode FILE_APPEND, the data will be appended to the end of the file, regardless of the current cursor position set by seek().

Write data to the file. Note that the data is not physically written to the SD card until the file is closed (with a call to the close() function) or explicitly synced (with the flush() function).

• read()

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

data: the byte, char, or string (char *) to write

buf: an array of characters or bytes

len: the number of elements in buf

SD : File class

write()

Description

Write data to the file.

Syntax

file.write(data)

Parameters

file: an instance of the File class (returned by SD.open())

data: the byte or char to write

Example

See Also

• print()
• println()