Synchro Labs created this project to demonstrate the use of the Synchro mobile app platform with custom hardware:
Drinkro Cocktail Robot
based on a Raspberry Pi 3 Model B and a custom-designed hardware board used to control four DC liquid peristaltic pump motors using two L293D dual H-bridge ICs
Hardware design files are available on GitHub:
SynchroLabs/DrinkroHardware
Video of Drinkro in action: