 Welcome to this STM32 in the Sky event. We are in the context of four engineering schools that are working with our components, the STM32, but also other components to do a stratospheric balloon project. It's a pleasure and we are very proud to co-organize and receive the STM32 contest in collaboration with the San Victor International School. So, we are three students and three tutors and we are in Polytechnic of the Anti-Police. So, we are a team of seven students from Central Marseille. Our project is called SkyMars. So, we are the team from Isen in Kriya, in Toulon. Hello, we are a PolyMars team from Polytech Marseille. We represent micro-electronic and telecommunications students. It's a very huge opportunity for us to promote our industry, to promote our product as the STM32 in this kind of challenge. So, the purpose of our scientific experiment is to make a relay between devices using Lora1 technology, which means that our balloon will work as a gateway transmitting data from a device on the ground to another one. And so, we hope to cover a long range using this technology. So, we wanted to see if the UV in the stratosphere have a real impact, more important than on the Earth. So, our payload is filled with some yeast and we will see if they die or if they survive and how many. And we will compare these results with experiences we did previously in the lab. So, we are doing a different measurement on humidity, temperature, pressure. They are the easy one, I would say, because we know the stratosphere is different in different steps. Then, they are the other ones that are more complicated, such as CO2 or magnetic field. And we are also doing experiments on the flash memory. We embedded two scientific experiments. The first one is a measurement of environmental parameters. And we are aiming to evaluate the pollution in the stratosphere. For the second experiment, it's a little bit unique. It's a sound wave propagation estimation, how it's the sound wave propagates up in the air. So, it was kind of difficult because no one in the team had ever touched microelectronics before. We had never experienced something like this. But we were really helped by the SD team. So, it was quite interesting to develop our own experience and our own data that we will collect later on. So, difficult but very satisfying to make it work. I think the best moment is when you don't understand, you try everything and at one moment you change a single thing and everything works. You can see your payload on the internet for instance and that's really satisfying. For having fun, it was really an interesting experience and a challenge by using SD products. Developing some new features in our teamwork, like designing the PCB, that was not easy and we have all been working on that. We have worked like a group and when we had difficult moments, we acted like a solid team and helping each other. So, it's really a teamwork building project. So, we are using the STM32L4. We are using this one because it has low power and as we know we need to save power during the ascent and the descent. And then we are using GPS and low-ride devices. We also used Atolic and STM32Q to program our pod. We used embedded libraries. We also received the new boards and then by practicing C++ programming, we succeeded in programming the card. We know that other teams are very efficient but this is a competition so we hope to win, yes.