I am using a Cerbo GX + Ruvvi Temp Sensors in a Greenhouse. When Temperature falls below a certain point, I want the relay to close, and the heat pads to activate. When the temperature exceeds a certain point, I want the relay to open, and power to the heat pads to disconnect.
I have built the setup, and it's running, but I believe the configuration on the Cerbo GX, and relay control is designed to operate for cooling principles NOT heating. I believe the program is directional, and the user would benefit from being able to determine the direction that the program operates. One should be able to determine if the activation value or de-activation value triggers the relay based on direction.
Below is my current setup, 'Activate' at 11 degrees, and 'de-activate' at 17 degrees, yet its currently 8 degrees outside and the condition is 'active'.
Its active because at some point in the day, the temperature exceeded 11 degrees, so the relay activated, yet even though its fallen below 11 degrees it remains active. It would only shut off if the temperature exceeded 17 degrees.
How can I set it up, so that if the temperature falls below a certain point the relay is activated, (as I think the relay works only when the temperature EXCEEDS a certain value.
It's designed for a hot cabinet, activate when temperature is 30 degrees, de-activate when temperature is 20 degrees as an example.
I believe the activation direction is the limiting factor, since once temperature exceeds 17 degrees the relay would deactivate. Yet if it falls below 11 degrees It won't activate, only once it INCREASES past 11 degrees.
A link to the setup is here, in-case you wanted to have a look. https://vrm.victronenergy.com/installation/213577/share/7a0c99c7
I am using Carbon heat pads, which are incredibly low energy, but will give enough heat to the plant pots to improve growing conditions.
Let me know if you have a better way of programming this.