“You’ve Got a […] Message” is a multisensory public communication system that makes overlooked ecological signals visible, audible, and tangible. Built on an Ecological AIoT framework, it translates subtle changes in non-human life and environmental conditions into visual, sonic, and tactile experiences through three interactive devices: Spectrum Post, Chorus Mail, and Pulse Note. Piloted in Beijing’s Zhongguancun Park, the project demonstrates how curiosity-led interaction can shift environmental awareness from passive observation to emotional connection and public participation.