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Stc-1000+

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Not sure why the light is on, but you can check the outputs by plugging in something (like a fan) and try to cycle the cooling/heating outputs on/off. If it doesn't turn on, check the wire to the socket (unplug unit first!) to see if it has a good connection.

Is this a unit you built, or purchased?
 
Built. I hard wired it into the fridge. It's old, from the 50's. I think it died but just wanted to make sure it wasn't a error with the controller.
 
Hi all,
Looking for some advice here on an STM8 board.

I have a new revision of the STM8 (XD-1000-V1.0) board that I can flash Emile666's firmware to just fine, but once flashed the temperature probe no longer works as it should instead it just counts up. I have four units and flashed two of them with the same results.

With both of the flashed units, a calibration with a 10.003ohm resistor results in the unit counting up from 25C until it hits 40C (about 20 minutes), it then oscilates between 40-42C indefinitely.
With one of the non-flashed units, the same resistor sits rock solid at 24.7 for over an hour without ever changing.

In troubleshooting, I have traced out the entire frontpanel (LCD) board and found it to match Emile666's exactly, despite the different IC package for the STM8. I have also traced the temperature probe to make sure the resistors were the same value on the backplane as Emil666's. Everything checks out.

Any ideas what would cause this?
My first thought is a floating input-- Do I need to have two probes attached?

Photos of the boards attached in case anyone is interested or has the same model.
View attachment 588265 View attachment 588266 View attachment 588267
Hey, have you been able to solve this? I'm in the exact same situation, and i dont know what else to try!
 
Before I go reinventing wheels, is it possible to hook a Raspberry Pi 3 – Model A+ directly to the header pins on my Stc-1000+? I'm about to add a Pi to my brewhouse to monitor Tilt hydrometers and I am curious if I could use the Pi to reprogram my STC's when I want to change profiles quickly.
 
Before I go reinventing wheels, is it possible to hook a Raspberry Pi 3 – Model A+ directly to the header pins on my Stc-1000+? I'm about to add a Pi to my brewhouse to monitor Tilt hydrometers and I am curious if I could use the Pi to reprogram my STC's when I want to change profiles quickly.
May be the arduino one wire comunications option can be connected to the Pi.
 
Yea I have been thinking about that but I'm not even sure what I should start googling and that is quite a bit out of my wheelhouse. Got any links/tips? Thanks!
 
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