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matsstaff / stc1000p

Programmable thermostat firmware and arduino based uploader for the STC-1000 thermostat
GNU General Public License v3.0
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OVBSC - Relay repeatedly ON/OFF every ~4 seconds #98

Closed dboyd13 closed 7 years ago

dboyd13 commented 7 years ago

Caveat: This is my first attempt at using STC-1000+ firmware, so I may have missed something.

Background of use of stock STC:

I have an electric brew-in-bag style system (basically an electric urn) - I have the stock firmware STC installed like this:

Wall outlet -> stock STC (/w heating relay wired to another electric outlet) -> electric urn (with manual thermostat contstantly set to max).

This allows the STC to turn the urn on / off during the mash to maintain temps. Aside from the above I have a march pump that I power up/down manually for recirculation.

STC1000+ Use case:

My plan is to use one of the new STC, with 1000p firmware in the exact same position as the above STC - however to be able to set a mash profile.

To do this I loaded the STC1000p sketch for OVBSC (https://github.com/matsstaff/stc1000p/tree/master/ovbsc) - the Celsius version.

I was rather overwhelmed by all the parameters that can be set for my simple use case (i.e mash step profiles) - but I set the following (leaving the reset to defaults):

This was to align to my common simple mash profile of adding room temperature grains into 70.5 deg water, which then cools it to 67 deg which I hold for 70 mins (saccharification), then increase temp to 75.6 deg and hold for 20 mins (mash out)

Issue:

When I go to execute 'run' on the ST1000p enabled controller:

'Pr' run mode - switches the cooling relay on and off every 4 seconds 'Co' run mode - switches the heating relay on and off about every 4 seconds

Not certain if this is an issue? or if I'm missing some parameters to be set?

dboyd13 commented 7 years ago

Posted question to homebrew forums instead. Closing.