OpenComputers - receiver.lua

local component = require("component")
local event = require("event")
local fs = require("filesystem")
local modem = component.modem
local rs = component.redstone

local port = 20

if fs.exists("/home/pw.psd", "r") then
file = io.open("/home/pw.psd", "r")
pw = file:read()
file:close()
else
print("Couldn't find \"/home/pw.psd\"")
return
end

modem.open(port)
print("Opened port " .. port)

while true do
local _, _, from, port, _, message = event.pull("modem_message")
print("Message from " .. from .. " on port " .. port .. " : " .. tostring(message))

if message == pw then
rs.setOutput(4, 15)
os.sleep(5)
rs.setOutput(4, 0)
else
print("Wrong passwod!")
end
end