ChromiteBlue.com

while working with nxt_python and a few applications written in NXC, I found I had a need to get files from the NXT Brick with a minimum of fuss. The following python script will “pull” a single file from the NXT Brick. Wildcard behavior is undefined, and is planned for version 0.2.

example usage:

[gary@motoko]# nxt_pull log.txt

code:

#!/usr/bin/env python
#
# nxt_pull:
#   Pull a file to a LEGO Mindstorms NXT brick,
#   based on Douglas P Lau's nxt_filer and nxt_push
#   Copyright (C) 2008 Gary French
#   Version: 0.1
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

import sys
import nxt.locator
from nxt.brick import FileFinder, FileReader, FileWriter

def read_file( b, fname ):
	r = FileReader(b, fname)
	r.__enter__()
	try:
		f = open(fname, 'wb')
		print 'Pulling %s ...' % (fname),
		try:
			size = 0
			for data in r:
				f.write(data)
				size += len(data)
		finally:
			f.close()
			print 'read %d bytes' % size
	finally:
		r.__exit__(None, None, None)

if __name__ == '__main__':
	sock = nxt.locator.find_one_brick()
	#sock = nxt.locator.find_one_brick(host='00:16:53:XX:XX:XX')
	if sock:
		b = sock.connect()
		read_file( b, sys.argv[1] )
		sock.close()