I recently got a mini fridge set up with an STC-1000 (Lerway from Amazon), and it just so happened to be the AG_400P v1.1 model!
I immediately ordered the Arduino mini and usb so I can flash mine, but that got me thinking on what to do with this Arduino after this project. None of the current projects out there really interest me, but I found this thread:
https://www.homebrewtalk.com/showthread.php?t=517849
Based on what I've read about alcohol sensors, I can't find any solid info on the accuracy or precision of these sensors, but could we somehow use this type of a monitor to output a signal to the STC, allowing it to trigger temperature ramping once a certain percent of attenuation is reached? Additionally, the arduino component could transmit the data over bluetooth or WiFi.
Even more simplified, could one hook the alcohol sensor up to the connections for a second temperature probe, and have the STC could interpret the resistance of this sensor to know when to change temperature setpoints? Based on what I've read on the GitHub page, the processing power of an STC seems fairly limited, so I was wondering if anyone would have any input on the feasibility of this feature. I would be interested in looking into developing this myself, but my programming knowledge is limited, and so I'd like to ask those more experienced before digging too deep.
My second idea for this project, which would probably be much more simple, is custom temperature probe lookup tables. Would this be as simple as digging through the source code, and replacing old numbers with the values I find from another manufacturer? My reasoning behind this is if my probe were to ever get damaged, I could simply buy any RTD, Thermocouple, or Thermistor depending on the uncertainty I would like or amount I want to spend and simply replace the lookup table to match my new sensor.
I would appreciate any input on either of these ideas!