PowerMon v0.1

os.loadAPI("ocs/apis/sensor")
local power = sensor.wrap("left")
if ( power == nil ) then
    print("No sensor!")
    os.exit()
end

-- coordinates of block to monitor
local location = "-1,1,0"

-- amount of energy space needed to turn on
local trigger = 2000


function getEnergySpace()
    local blockInfo = power.getTargetDetails(location)
    if ( blockInfo == nil ) then
      print("Can't get block info")
      os.exit()
    end
    return blockInfo["EnergySunken"]
end


while true do
    if ( getEnergySpace() < trigger ) then
        rs.setOutput("top",true)
        os.sleep(2)
    else
        rs.setOutput("top",false)
        os.sleep(10)
    end
end