 Hello, I am Dominique, application engineer, part of ST Micro Electronics area of lab. And today with my colleagues, Sébastien and Laurent, we are more than pleased to welcome you on this STM32 WBA55 online course. At the end of the day, for sure, the target is to be able to play and to build a basic Bluetooth low-energy peripheral application based on our STM32 WBA55 Nucleo that you should all get on your desk. Of course, we'll take opportunity as well to go through the main product features and as well the associated powerful STM32 Cube ecosystem, which has been tuned for the RF in order to ease your design. So let's have a look to the overall agenda. Okay, so before playing with the boards and before building a basic Bluetooth low-energy peripheral application, Yvon will give you a short technical marketing presentation of our Bluetooth low-energy system and ship STM32 WBA55. Then we'll move into a more deep technical session in regards of some key features of the WBA55. And then we'll play with through steps, within through steps. First one will be a basic click and go, starting from an existing code example and building a basic P2P server application. Then we'll move to ends on part one and two where we will build first a peripheral, which is a discoverable device and then that will add on top a basic Bluetooth low-energy profile, P2P server, in order to be able to be connected with a smartphone and then we'll be able to play and exchange data between the two devices. Finally at the end of the session, my colleague Laurent will give you some key message about the hardware capability of the device but as well some key message about what are the ST recommendation ST ecosystem similar to ease your design, test your design and move with your design to certification.