View difference between Paste ID: wUjM3Pva and 8HrdCuRd

 local function send(ch,msg)
     local modems = {peripheral.find("modem")}
     local ch = tonumber(ch)
     for k,v in pairs(modems) do
         v.open(ch)
     end
     for k,v in pairs(modems) do
         v.transmit(ch,ch,msg)
     end
 end
 
 local function close(ch)
     ch = tonumber(ch)
     local modems = {peripheral.find("modem")}
     for k,v in pairs(modems) do
         v.close(ch)
     end
 end
 
 local function selectProfile()
     local profiles = fs.list("/rrp")
     for i=1,#profiles do
         print(i .. ") " .. profiles[i])
     end
     print("Select")
     local sel = tonumber(read())
     local prof = {}
     local handle = fs.open("/rrp/" .. profiles[sel],"r")
     prof.ch = handle.readLine()
     prof.head = handle.readLine()
     handle.close()
     return prof
 end
 
 local function add()
     print("Sync key?")
     local key = read()
     print("Profile name?")
     local name = read()
     --send(65000,key)
     local function wait()
         sleep(5)
         error("Synchronisation failed!")
     end
     local function sync()
         local modems = {peripheral.find("modem")}
         for k,v in pairs(modems) do v.open(65000) end
         send(65000,key)
         while true do
             local r = {os.pullEvent("modem_message")}
             local data = textutils.unserialise(r[5])
-            if data.identify then
+			if data then
-                if data.identify == key then
+            	if data.identify then
-                    print("Received signal")
+                	if data.identify == key then
-                    local handle = fs.open("/rrp/" .. name,"w")
+                    	print("Received signal")
-                    handle.writeLine(data.channel)
+                    	local handle = fs.open("/rrp/" .. name,"w")
-                    handle.writeLine(data.header)
+                    	handle.writeLine(data.channel)
-                    handle.close()
+                    	handle.writeLine(data.header)
-                    close(65000)
+                    	handle.close()
-                    break
+                    	close(65000)
-                end
+                    	break
-            end
+                	end
             	end
 			end
         end
     end
     parallel.waitForAny(sync,wait)
     sleep(2)
 end
 
 local function on()
     local prof = selectProfile()
     send(prof.ch,prof.head .. "on")
     print("Done")
     sleep(1)
     close(prof.ch)
 end
 
 local function off()
     local prof = selectProfile()
     send(prof.ch,prof.head .. "off")
     print("Done")
     sleep(1)
     close(prof.ch)
 end
 
 local function click()
     local prof = selectProfile()
     send(prof.ch,prof.head .. "on")
     sleep(1)
     send(prof.ch,prof.head .. "off")
     print("Done")
     sleep(1)
     close(prof.ch)
 end
 
 local function main()
     while true do
     term.clear()
     term.setCursorPos(1,1)
     print("RemoteRedstone  Client by Rahph")
     print("")
     print("1) Add profile")
     print("2) Enable signal on profile")
     print("3) Disable signal on profile")
     print("4) Simulate button press on profile\n")
     print("9) Exit")
     local sel = read()
     if sel == "1" then
         add()
     elseif sel == "2" then
         on()
     elseif sel == "3" then
         off()
     elseif sel == "4" then
         click()
     elseif sel == "9" then
         break
     else
         print("Uhhhh... no!")
         sleep(2)
     end
     end
 end
 main()