I use nodemcu and second-hand smc proportional valve to control the pressure of air compressor. Connect homeassistant via MQTT protocol and use homebrigde to connect homekit which we can use voice control.watch the video on YT (https://www.youtube.com/watch?v=dH1tfyaTR-E&t=17s)Just say you want to and focus your own business.
Can we run it without electric? I want to review it for my blog post. You can see here blog post, camping tents