I have "Servers" group inside Devices overview, inside it we have a lot of physical servers connected as devices. Every server has "Ping" sensor connected to it. I want to find out what servers lost their Ping from Saturday to Sunday with a time period. As far as i understand i need to create a report with all sensors Ping from all servers. How can i do that? Or i need to create this report from every Ping sensor from every server?