Chime does not sense motion

Brand new Chime. Motion is not triggering it. Ring Doorbell 2 works fine. Tried with Ring button enabled or disabled. Button push works, motion triggers sounds on both of our iPhones but not the Chime. Even tried different Chime tones which work fine for bell button pushes. RSSI is 55, WiFi modem is 20 ft away in line of sight. Firmware is "Up To Date". Snooze is off. Help please.