Thank you all for replying, I have a pc as server now for blynk so I can use that as controller, te nodemcu as gateway for Its WiFi signal but can I use more than 1 nodemcu?

I already Build doorsensors And pir sensor And temp & hum And water temperature sensors on arduino, can I use those or do I have to build from scratch..,,?

Hi i have used arduino a while now i have a local Blynk server, but i am interested in mysensors the one thing i dont see here.... how to get started... do i need to setup a server with software where everything is running from (like Blynk?) od does it al run on a arduino... i have a uno a mega2560 and a bout 10 nodemcu v3.... where to start...? what i want to acomplish is a home automation including a alarm function when i leave yhe house....