Obviously this isn't very optimal given the Yun architecture.
I changed this so that the Linino gets the Temperature (or other measurements) from the MCU and then the Linino CPU will do the ftp-ing. Using Python this is very straightforward.
The only tricky part is that the ftp expects a file, but I don't want to put the data in a file. Luckily there exists a StringIO class that can take care of that. The code becomes something like:
import StringIO from ftplib import FTP myFileIO = StringIO.StringIO() myFileIO.write(now_str) myFileIO.write(",") myFileIO.write(temp) myFileIO.seek(0) ftp=FTP("ftp.homebrew.be") ftp.login(User,Pass) ftp.cwd("www.homebrew.be/Yafa") ftp.storlines("STOR dat.csv",myFileIO) ftp.close() myFileIO.close()
Use APPE instead of STOR if you want to append to the file.