powerMonitor.lua

vos.loadApi('core.api')
vos.loadApi('relay.api')

local net = peripheral.wrap("bottom")
Relay.find()

local percent
local banks = 0
local rsside = 'top'
local lastReading

rs.setOutput(rsside, false)

local function getCells()
  local cells = {}
  local names = peripheral.getNames()

  for _,name in pairs(names) do
    if string.find(name, "energycell") then
      table.insert(cells, name)
    end
  end
  return cells
end

Event.addHandler('heartbeat', function()
  local total = 0
  local max = 0
  banks = 0
  for k, cellName in pairs(getCells()) do
    local cell = peripheral.wrap(cellName)
    local cellStored = peripheral.call(cellName, 'getEnergyStored', "unknown")
    local cellMax = peripheral.call(cellName, 'getMaxEnergyStored', "unknown")
    total = total + cellStored
    max = max + cellMax
    if cellStored < cellMax then
      banks = banks + 1
    end
  end

  percent = math.floor(total * 100 / max)
  print(total .. " (" .. percent .. "%)")

  if percent < 90 then
    rs.setOutput(rsside, true)
  elseif percent >= 95 then
    rs.setOutput(rsside, false)
  end

  local meterColor = colors.green
  if percent < 75 then
    meterColor = colors.red
  elseif percent < 90 then
    meterColor = colors.orange
  end

  Relay.send('panelUpdate', {
    uid = 'power',
    type = 'meter',
    text = 'Power',
    value = percent,
    color = meterColor
  })
  Relay.send('panelUpdate', {
    uid = 'dynamos',
    text = 'Dynamos',
    type = 'radio',
    active = rs.getOutput(rsside),
  })
  if lastReading then
    local diff = math.floor((total - lastReading) / 600)
print('diff: ' .. diff)
    Relay.send('panelUpdate', {
      uid = 'powerDiff',
      type = 'text',
      text = string.format('Power Usage: %+d RF/t', diff),
    })
  end
  lastReading = total
end)

Event.addHandler('char', function()
  Event.exitPullEvents()
end)

os.queueEvent('heartbeat')
Event.heartbeat(30)