rfid

server_id = 6

security_level = 0
radius = 2
reader = peripheral.wrap("right")
rednet.open("back")

function read_or_receive()
  reader.scan(radius)
  timeout = os.startTimer(0.3)
  while true do
    event = {os.pullEvent()}
    if event[1] == "rfid_detected" then
      if tonumber(event[2]) >= security_level or security_level == 0 then
        redstone.setOutput("top", true)
      end
      break
    elseif event[1] == "rednet_message" then
      if event[2] == server_id then
        security_level = tonumber(event[3])
      end
      break
    elseif event[1] == "timer" and event[2] == timeout then
      redstone.setOutput("top", false)
      break
    end
  end
end

while true do
  read_or_receive()
end