J'ai soif connect

Introduction

As last year engineer students, we had to make something which is connected. We decided to make a connected bar. It means that the device has to make a drink mixing multiple thing ingredients such as grenadine, mint, lemonade or water.

To order a drink, you have to send a command from an application, set a glass at the spot and wait for it to be filled.

Architecture

The "J'ai soif connect" device use WiFi to ask (on glass deposit) and receive drink recipe to the server. This one could receive order from an application or voice order from Dialogflow (Google voice assistant API).

Electrical system :

Note: In order to make the weight sensor work correctly, the device must be above the ground. As the distortion of the metal changes its resistance (it is used in a Wheatstone bridge to mesure the weight), it needs to be distorded by the weight of items. You can do such as this to get the item weights:

Backend

The backend has been developped using Express to create an API and using Web-Sockets to receive the status of the order.

Actually, the backend is not safe and secure, so do not use it as a public server !

Application

The application has been developped using React Native. With it, you can make your own drink and follow the status of the order !

Google Assistant

Test by yourself !

To be serve, you need: