Arduino Temperature Monitoring Update
Having lived with my monitoring system for a little over a month, I can say that I found this project to be very fun. I now can see when and how long each of the hydronic floors is active and the temperatures around the different parts of the system.
From the data I have collected, I was able to experiment with the pump speeds. Each pump has three speeds. Monitoring the outlet and inlet temperatures showed that using the lowest speed left the most heat in floors. Previously, from my seat of the pants experience, it seemed that the middle setting was better, but the data shows that it is low and slow that works better.