For this day we decided to look for some informations for our project.
So we've decided to download the arduino software, which is going to be required for the arduino uno card. We will need to learn the C language.

We have also worked on the design of our device, how it will be arranged, and how we are going to protect the breakable parts (arduino card, ultrason sensor, time of flight sensor).

To put it in a nutshell, the wristband should look like that :

As you can see on this drawing, we are thinking about using also an ultrason sensor that will be placed on the top of the arduino uno card's shell (in addition of the time of flight sensor)

It will allow us to improve the range and the radius of our device.

We also have made a plan of the connections in our device :