The TXT 4.0 controller offers a lot of new features with its memory space of 512 MB RAM and 4 GB eMMC, the three servo outputs as well as a capacitive touch display, which supports swipe gestures. The improved WLAN and Bluetooth module offers the suitable wireless interface for numerous applications. Another interface is the USB host connection to which fischertechnik USB camera or USB sticks can be connected. Up to eight additional controllers can be connected to one controller as extensions. The controller can be perfectly integrated into the models through the narrow housing. In order to be always up-to-date, firmware updates are automatically downloaded via the cloud, whereby own programs are retained. With the software ROBO Pro Coding can be programd graphically as well as with Python. It is independant of the operating system and can also be used on mobile devices.Up to eight other controllers can be connected to one controller.Automatic firmware updates via the cloud, whereby ow