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 <a target="_blank" rel="noopener noreferrer" href="http://control.watch">control.watch</a> the video on YT (<a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=dH1tfyaTR-E&t=17s">https://www.youtube.com/watch?v=dH1tfyaTR-E&t=17s</a>)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