I apologise if these basic questions are in the wiki, other posts in the community, or somewhere else, but I have made the effort to look and have come up empty
OK, so first off here’s some background. I have a working fermentation chamber made from a fridge - what seems to be a fairly standard setup i.e. thermostat bypassed, thermowell in the fermenter, 100W IR (reptile bulb type) heater, currently run by an STC-1000 controller.
I came across the BrewPiLess project and hence to the source of the goodness - BrewPi.
I have a very strong interest in improving my setup via BrewPi, a low cost way to try this could be brewpiless or a homebrew Arduino/RPi setup, but ultimately if it all looks good I rather like the look of the Spark as a final solution.
So, what i do not understand, is exactly how the BrewPi control works; I see implementations with relays and SSR’s so my first question is whether the control (whcih is mentioned as PID) is in fact switching the relays on/off at relatively long intervals of many minutes, and it has a PID action when viewed over a long enough time period, OR is it that when SSR’s are used, the system does “real” PWM for the heater? Of course you can not PWM a compressor.
This seems simple, but i am conflicted by seeing mechanical relay setups, but then comments such as BrewPi Noob has some questions and comments where Elco says "Note that this is heating at maybe 5% power. "
The next question seems to be on a very common theme - are there some sensible default paramters for the various delays and constants, or a library/thread of people’s setup and their parameters so that I can start with something closer to right than wrong? I note Elco is vociferous in helping foks who post thier graphs and ask for help, is that just the done thing?
Lastly - is it terribly rude to get my feet wet with BrewPiLess and ask for tuning help here? The thing is, it’s the weekend coming up, and i have the relays and ESP8266 needed to implement a BPL system to get testing and playing with the underlying brewpi control - and i guess i am impatient!