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I'm working on a rocket altimeter for chute deployment and max height recording etc. 1 foot resolution is what I'm aiming for, though in reality it may be a lot less. I got a MPX4115A sensor, the output only changes 1.43v from sea level to 10k feet, so by using a 16bit adc I get about 9230...

This is the first Program I've written without copping anything, it's for a greenhouse - open and close the vent according to temperature, and water when soil gets to dry. I know it's probably a real mess, but is there any parts that could do with a tidy up, or rearrange? because it's a bit...