For geeks only! You have been warned! Second Edition!
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Published on ● Video Link: https://www.youtube.com/watch?v=VJI5xB4UCD4
Thanks to your awesome ideas, I've upgraded the PID Arduino contraption for round two. Just a heads up, it's not meant for anything serious – just some fun and games. Modbus does all the hard work as usual. Now, no need to patiently wait for the room temperature to do its thing; I've got a hair dryer in the mix for some extra flair. Hope everyone's cool with that!