Here’s another update. I modified the flow meter DH to add the capability “Power” so that any one of the logging apps I mentioned above will capture the last gallons used. Since ST doesn’t have any capability for flow, I had to use Power, and technically the device (and the DH) acts like a power meter.
After working on another project, I would highly recommend using the app Simple Event Logger to capture your usage, it’s by far easier and it’s a whole lot better:
Here’s what my logging looks like. Remember that “power” is really gallons used: