Apologies if a stupid question, I tried searching but maybe I used the wrong words. 
Is there a deCONZ/raw Linux way to directly fire “something” (command line software) on a status change, or every time a sensor device publishes data? Is there a place to hook into, or something to spy on?
I am running headless Pies with both Conbee II and Raspbee II, and I want to gather sensor data and process them with my own code. In a previous world I did this with a 433 MHz system, and there the decoded data from the listening hardware was exposed as some /dev/ resource, so I could just loop and snoop on that. Right now I am polling the deCONZ API, but this seems inefficient and is not near-realtime and loses stuff if status changes on/off between polling, and to detect changes I will have to keep track of status locally. While API polling is certainly doable, I’m wondering if there is a smarter way to do this.
I am not really interested in using HASS, or anything that requires a GUI on the Pies.