indication = require("indication")                           
                                                                                                                                                                                                                                                                          
leds = indication.Leds.new({RGB=true, ledPin=pio.GPIO32})                                                                                                                                                                                                                                      
snd = indication.Sound.new(pio.GPIO21)
wdt_on = Settings.get("sys_wdt") == "on"                                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
pio.pin.setdir(pio.OUTPUT, pio.GPIO2) -- Замок
lock = function() pio.pin.setval(1, pio.GPIO2) end;
unlock = function() pio.pin.setval(0, pio.GPIO2) end;                                                                                                                                                                                                                                                  
lock()

modbus.rtu.init(Settings.get("rs485_addr"))

-- функция запуска wifi-интерфейса по modbus-команде
local web_start = (function()
  local web_started = false
  local sn = cpu.getmac(0, 1)
  return function(num)
      if web_started then return end
      if string.sub(sn, -4) == string.format("%02X", num) then
          net.wf.setup(net.wf.mode.AP, Settings.get("net_ssid"), Settings.get("net_password"), net.wf.powersave.NONE, 4, false)
          net.wf.start()
          web_started = true
      end
  end
end)()

if cpu.resetreason() == cpu.RESET_POWERON then
  leds:start()
  snd:start()
end

-- главный цикл
local uid, ret, action, web_pwd, new_addr

while true do
  if wdt_on then cpu.watchdog.reset() end

  uid = mfrc522.scan(7)
  if uid then
      modbus.setregs8(0, uid)
  end

  ret = modbus.getregs(0xf0, 3, true)
  action, web_pwd, new_addr = ret[1], ret[2], ret[3]
  if action == 1 then -- разрешено
      unlock()
      leds:ok()
      snd:ok()
  elseif action == 2 then -- запрещено
      lock()
      leds:err()
      snd:err()
  elseif action == 3 then -- закрыть замок (после прохода)
      unlock()
  end
  if web_pwd and web_pwd ~= 0 then
      web_start(web_pwd)
  end
  if new_addr and new_addr ~= 0 then
      Settings.set("rs485_addr", string.format("%d", new_addr & 0xff))
      os.exit()
  end

  thread.sleepms(200)
end