ComputerCraft EU Reader & Display

mon = peripheral.wrap("right")  --define monitor
mon.setTextScale(0.5)           --text size in 0.5 increments
monX,monY = mon.getSize()
rednet.open("back")             --wireless modem only.  wired just work
power1 = peripheral.wrap("ic2:mfsu_2")
power2 = peripheral.wrap("ic2:mfsu_3")
power3 = peripheral.wrap("ic2:mfsu_4")
power4 = peripheral.wrap("ic2:mfsu_1")
generator1 = peripheral.wrap("ic2:matter_generator_1")
local DEBUG = 1
local reactorOnline = 0
local turnOnAt = 30
local turnOffAt = 90
local maxpower1 = 0
local curpower1 = 0
local perpower1 = 0
local maxpower2 = 0
local curpower2 = 0
local perpower2 = 0
local maxpower3 = 0
local curpower3 = 0
local perpower3 = 0
local maxpower4 = 0
local curpower4 = 0
local perpower4 = 0

function readMFSU()
    maxPower1 = power1.getEUCapacity()
    curPower1 = power1.getEUStored()
    perPower1 = math.floor(((curPower1/maxPower1)*100)+0.5)
    maxPower2 = power2.getEUCapacity()
    curPower2 = power2.getEUStored()
    perPower2 = math.floor(((curPower2/maxPower2)*100)+0.5)
    maxPower3 = power3.getEUCapacity()
    curPower3 = power3.getEUStored()
    perPower3 = math.floor(((curPower3/maxPower3)*100)+0.5)
    maxPower4 = power4.getEUCapacity()
    curPower4 = power4.getEUStored()
    perPower4 = math.floor(((curPower4/maxPower4)*100)+0.5)
    avgPower  = math.floor(((curPower1+curPower2+curPower3+curPower4)/(maxPower1*4)*100)+0.5)
end

function centerT(text,line,backColor,txtColor)
    mon.setBackgroundColor(backColor)
    mon.setTextColor(txtColor)
    length = (string.len(text))
    dif = math.floor(monX-length)
    x = math.floor(dif/2)
    mon.setCursorPos(x+1,line)
    mon.write(text)
end

function autoUU(per)
    if per < 5 then
        redstone.setOutput("left",true)
        print("UUMatter : OFF")
        title = "  UUMatter Status: OFF  "
        centerT(title,4,colors.red,colors.white)
    elseif per >= 5 then
        redstone.setOutput("left",false)
        print("UUMatter : ON")
        title = "  UUMatter Status: ON  "
        centerT(title,4,colors.black,colors.green)
    end
end

function drawBar(current,max,per,title,Y)
    if per > 70 then
        color=colors.green
    elseif (per >40) and (per < 70) then
        color=colors.orange
    elseif per < 40 then
        color=colors.red
    end

    bar = math.floor(((current/max)*(monX-2))+0.5)
     --Draw Background Bar
     mon.setCursorPos(2,Y)
     mon.setBackgroundColor(colors.black)
     mon.write(title.." MFSU")
     mon.setCursorPos(2,(Y+1))
     mon.setBackgroundColor(colors.blue)
     mon.write(string.rep(" ", monX-2))
     --Draw Percentage Bar
     mon.setCursorPos(2,(Y+1))
     mon.setBackgroundColor(color)
     mon.write(string.rep(" ", bar))
     mon.setCursorPos(2,(Y+1))
     mon.write(current .. "/" .. max .. " (" .. per .. "%)")
end

function updateScreens()
    --update computer screen
    term.setCursorPos(1,1)
    print("Average MFSU power: "..avgPower.."% Full")
    --update monitor
    mon.setCursorPos(1,1)
    mon.setBackgroundColor(colors.black)
    title = "  Average MFSU Power  " .. avgPower .. "% Full  "
    centerT(title,1,colors.green,colors.white)
    if reactorOnline == 1 then
        print("Redstone Status: start")
        title = "  Reactor Status: STARTED  "
        centerT(title,3,colors.black,colors.green)
    elseif reactorOnline == 0 then
        print("Redstone Status: STOP")
        title = "  Reactor Status: STOPPED  "
        centerT(title,3,colors.red,colors.white)
    end
    if DEBUG == 1 then
        print("avgPower: "..avgPower)
        print("turnOnAt: "..turnOnAt)
        print("turnOffAt: "..turnOffAt)
        print("reactorOnline: "..reactorOnline)
        print("overlay bar value: "..bar)
        print("monitor XxY size: "..monX.."x"..monY)
    end
end

function autoReactor()
    if avgPower < turnOnAt then
        if reactorOnline == 0 then
            rednet.broadcast("start")
            reactorOnline = 1
        end
    end
    if avgPower >= turnOffAt then
        if reactorOnline == 1 then
            rednet.broadcast("STOP")
            reactorOnline = 0
        end
    end
end

mon.setBackgroundColor(colors.black)
mon.clear()
term.clear()
while true do
    readMFSU()
    drawBar(curPower1,maxPower1,perPower1,"1st",5)
    drawBar(curPower2,maxPower2,perPower2,"2nd",8)
    drawBar(curPower3,maxPower3,perPower3,"3rd",11)
    drawBar(curPower4,maxPower4,perPower4,"4th",14)
    autoReactor()
    autoUU(avgPower)
    updateScreens()
    sleep(1)
end