Test running the app:
Wow its already reading 45% full before I calibrate it. I have to empty the tank and hit the "Min Cal" button to record the reading on empty and then fill the tank and press the "Max Cal" button to record the reading on full. After that the app will read accurately.
Whew...that only took 2+ years to accomplish ! LOL
(At this point I've only instrumented the black tank. The circuit and the app have the capability of also monitoring the grey tank. Yeah: If you have an Axis or Vegas 24.1 crawl under there and look at your grey tank...!)
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