@ggg welcome to the MySensors community, and congrats on building your first node It looks like the Mega is rebooting all the time. How is it powered? If you haven't already, check out https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help/ for how to fix the most common problems (power problems for example ). Then report back here and we'll help you take the next step.