batmon.lua

local batbox = nil

function yesno(val)
  if val then
    return "Yes"
  else
    return "No"
  end
end

function centerize(string, tty)
  tty = tty or term
  curx, cury = tty.getCursorPos()
  maxx, maxy = tty.getSize()
  
  l = #string
  padn = math.floor(maxx-l)/2
  tty.setCursorPos(padn + 1, cury)
  print(string)
  
end

for i, side in ipairs(peripheral.getNames()) do
  if peripheral.getType(side) == "batbox" then
    batbox = peripheral.wrap(side)
    break
  end
end

if not batbox then
  print "BatBox not present"
  return
end
term.clear()

while true do
  term.setCursorPos(1,1)

  centerize("******************")
  centerize("*                *")
  centerize("* BatBox Monitor *")
  centerize("*   by  hron84   *")
  centerize("*                *") 
  centerize("******************")
  print ""
  
  charge = batbox.getStored()
  cap = batbox.getCapacity()

  cpct = math.floor((charge / cap) * 100)
    
  out = batbox.getOutput()
  maxout = batbox.getMaxEnergyOutput()
  opct = math.floor((out / maxout) * 100)

  centerize("Curently stored: " .. charge .. " EU (" .. cpct .. "%)")
  centerize("Current output: " .. out .. " EU/t ("     .. opct .. "%)")
  centerize("")
  centerize("Connected to network: " .. yesno(batbox.isAddedToEnergyNet()))
  
  sleep(1)
end