I have a analog pressure sensor that is wired to mcp3008 chip on my Pi.
1: I need to calibrate the output some how, so that the value on my dashboard displays a PSI or number that does not need to be converted. Any tips would be helpful. Right now the options on the sensor are Float, Integer, Volt.
2: The trigger for this has a 0-1 slider and Im wondering if there is a way to also change this number range?
When PSI is 35 or above the pi opens a valve via a relay and then when the PSI drops below 35 it closes the valve.
Ideally there would be a timer to repeat this setting every 20 min.