@Kevin_Z Thanks for your reply. The problem is that I am not able to set up the main Deco unit using the app. When I reset the unit i get the flashing blue light for some seconds - flashing twice...

I bought a new mesh system model Deco P7 and cannot connect to main Deco. First the light was constantly yellow. After I have reset the Deco p7 unit - I got flashing blue light but I still cannot...