Allows G-Code or any data transfer between CNC machine control system and your Android device via serial line. Supported file storage types: - Internal memory of Android device - FTP server - Google Drive HW requirements: - Android device with USB OTG support - USB Serial converter with FTDI or PL2303 chipset - Micro USB male or USB C male to USB 2.0 adapter - DB9 F to DB25 M adapter, if your CNC machine is equiped by DB25 serial connector - null modem adapter DB9 F to DB9 F or null modem cabl