Connection issues

So have done all the suggestions. Router about 20ft from door bell. Does not detect people approaching our door yet picks up cars in the street. When doorbell rings can't connect to see who it is. Have 400mb internet. But the spot light cam at the back of the house works great. Doorbell sucks. It is hard wired in where precious one was. Have tried different angles with the mounts and same issues. Not happy with the door bell and will probably move to something else when my paid savings expires.