The Pinecil V2 has a new processor with Bluetooth. I'm a little fuzzy on whether it offers WiFi as well, but Pine64 suggested it could be used to automatically activate a fume extractor based on the tip temperature. Home Assistant integration wouldn't be hard.
As someone who has left their soldering iron run overnight, this might be useful...
Most soldering iron firmware includes a sensor routine that turns them off if movement stops for a set period.
I actually did set up a smart plug for my soldering iron in Home Assistant [1]. I set it up with a timer and presence detection (using my phone and watch) so that I don't leave it on by accident.
After reading this thread, it sounds like I need to get myself a better soldering iron and install IronOS