This demo uses IWR6843 to count and track people in a ceiling mounted orientation. The ceiling mounting enables more flexibility for installation, as well as the detection of a person's height. This height information is used to determine if a person is sitting, standing, or laying down. The demo shows how mmWave can connect to existing building infrastructure using Power over Ethernet (POE). The POE is enabled through a daughter board using MSP432E as an SPI-Ethernet gateway.