Activate/Deactivate one controller from another?

Mycodo
1

Hello,

I have a small 5v ultrasonic humidifier which I control from my Raspberry Pi using a MOSFET. I want to raise the humidity more slowly to avoid excessive condensation, and to that end I have created a “Trigger: Duration” controller which turns the humidifier on for 8 seconds every 20 seconds to effectively run it at 40% of its capacity.

However, when leaving the controller on I find that I still sometimes get excessive condensation and pooling depending on temperature fluctuations, so I ideally want to use a Bang-Bang controller to automatically turn the “Trigger: Duration” controller on and off based on the RH readings of my SCD41 sensor.

I cannot figure out how to do this since controllers do not seem to be able to control other controllers, only outputs. Is there an easy way for me to accomplish my goal in another way? General comments on my approach to growing mushrooms are also welcome.

Cheers!

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2

You can use the Activate/Deactivate Controller Action with a Conditional Function. You’ll need to write some basic Python with a conditional using a Measurement Condition for your humidity and then execute the Deactivate Controller Action when humidity is above your setpoint and Activate Controller when humidity falls below your setpoint.

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3

Thanks, this was exactly the pointer I needed. I was actually looking for a way to just do it programmatically, but I didn’t know what controller to look for :).

Thank you for creating Mycodo, it is really awesome!

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