/challenges-projects/design-challenges/sci-fi-your-pi/b/blog/posts/ftp-code-workingI have ordered a USB to RS232 cable ( USB-RS232 WE USB-RS232 WE) to be able to communicate to the AB SLC PLCI have ordered a USB to RS422 cable ( USB-RS422 WE USB-RS422 WE) to be able to communicate to the Fenner M-Trim controller FTP CommunicationW.en-USTelligent Community 12