 Welcome again. My name is Martin and I am a support engineer for low-power and Bluetooth devices. So today's topic is firmware upgrade over the air. We have tried to make as much focus on hands-on as possible. So after the short explanation of the principle, we will have two hands-on related to upgrade of the Bluetooth of the RF stack on the M0 site. So this is not directly related to FU-OTA but worth to practice. Then we have two hands-ons related to FOTA, one for the upgrade of the user application and one for the upgrade of the RF stack. So we see how the time goes. We might not have time to finish it all. And at the end, we will have a look at the evaluation of the current consumption on WB. So this is where we will need the power shield that you have in front of you.