Tanks

m1 = peripheral.wrap("railcraft:tank_iron_valve_2")
m2 = peripheral.wrap("railcraft:tank_iron_valve_1")
m3 = peripheral.wrap("railcraft:tank_iron_valve_0")

os.startTimer(1)
creosote_oil = false
tree_oil = false

function set(value1, value2)
  creosote_oil = value1
  tree_oil = value2
  rs.setOutput("left", creosote_oil)
  rs.setOutput("right", tree_oil)
end

function getValue(device)
  tanksTable = device.getTanks()
  maintank = tanksTable[1]
  return math.floor(100 * (maintank.amount or 0) / maintank.capacity)
end

function sendUpdate(v1, v2, v3, currentState)
  url = "http://gorgony.nl:25586/update?vals="
  url = url .. v1 .. ";"
  url = url .. v2 .. ";"
  url = url .. v3
  url = url .. "&state=" .. currentState
  http.get(url)
end

while true do
  e, r1, r2, r3, r4 = os.pullEvent()
  if e == "timer" then
    v1 = getValue(m1)
    v2 = getValue(m2)
    v3 = getValue(m3)

    if not creosote_oil and v1 > 95 then
      set(true, false)
    elseif creosote_oil and v1 < 5 then
      set(false, v2 > 30)
    end

    if not (creosote_oil or tree_oil) and v2 > 60 then
      set(false, true)
    elseif tree_oil and v2 < 20 then
      set(false, false)
    end

    sendUpdate(v1, v2, v3, ((creosote_oil or tree_oil) and "on") or "off")
    os.startTimer(60)
  end
end