Pressure Controller CC

local monitor = nil
local compressor = nil
local diskSide = nil

local outSide = nil

while monitor == nil or compressor == nil or diskSide == nil do

    for _, side in ipairs(rs.getSides()) do

        if peripheral.isPresent(side) then

            if peripheral.getType(side) == "monitor" then
                monitor = peripheral.wrap(side)

            elseif peripheral.getType(side) == "drive" then
                diskSide = side

            elseif string.gmatch(peripheral.getType(side), "compressor") then
                compressor = peripheral.wrap(tostring(side))
                outSide = side
            end

        end

    end

end

print("Peripherals found")

local targetPressure = 0

if disk.getLabel(diskSide) ~= "Floppy Disk" and disk.getLabel(diskSide) ~= nil then
    print(disk.getLabel(diskSide))
    targetPressure = tonumber(disk.getLabel(diskSide))
end

local currentPressure = 0
local change = true

monitor.clear()

while true do

    if change then
        monitor.clear()

        currentPressure = compressor.getPressure()

        if currentPressure < targetPressure then
            rs.setOutput(outSide, true)
            --print(currentPressure)
        else
            rs.setOutput(outSide, false)
        end

        monitor.setBackgroundColor(colors.black)

        monitor.setCursorPos(1, 3)
        monitor.setTextColor(colors.red)
        monitor.write("-")

        monitor.setCursorPos(7, 3)
        monitor.setTextColor(colors.green)
        monitor.write("+")

        local newString = string.format("%.1f", targetPressure)

        monitor.setCursorPos((math.ceil(3 - (newString:len())/2))+1, 3)
        monitor.setTextColor(colors.white)
        monitor.write(newString)
    end

    os.startTimer(.1)

    local _1, _2, xpos, ypos = os.pullEvent()

    if currentPressure ~= compressor.getPressure() then
        change = true
    end

    if xpos == 1 and ypos == 3 then
        change = true
        targetPressure = targetPressure - 0.1

        disk.setLabel(diskSide, tostring(targetPressure))

    elseif xpos == 7 and ypos == 3 then
        change = true
        targetPressure = targetPressure + 0.1

        disk.setLabel(diskSide, tostring(targetPressure))
    end

end