diff --git a/bot/bot.lua b/bot/bot.lua
index 5419b7d..cc53369 100644
--- a/bot/bot.lua
+++ b/bot/bot.lua
@@ -59,11 +59,13 @@ function do_action(msg)
       matches = { string.match(text, pattern) }
       if matches[1] then
         print("  matches",pattern)
-        result = desc.run(msg, matches)
-        print("  sending", result)
-        if (result) then
-          _send_msg(receiver, result)
-          return
+        if desc.run ~= nil then
+          result = desc.run(msg, matches)
+          print("  sending", result)
+          if (result) then
+            _send_msg(receiver, result)
+            return
+          end
         end
       end
     end
@@ -182,6 +184,10 @@ end
 
 function on_binlog_replay_end ()
   started = 1
+  load_plugins()
+  -- Uncomment the line to enable cron plugins.
+  -- cron_plugins()
+  -- See plugins/ping.lua as an example for cron
 end
 
 -- Start and load values
@@ -195,7 +201,6 @@ plugins = {}
 
 -- load all plugins in the plugins/ directory
 function load_plugins()
-  plugins = {}
   for k, v in pairs(scandir("plugins")) do
     -- Load only lua files
     if (v:match(".lua$")) then
@@ -206,5 +211,16 @@ function load_plugins()
   end
 end
 
-load_plugins()
+-- Cron all the enabled plugins
+function cron_plugins()
 
+  for name, desc in pairs(plugins) do
+    if desc.cron ~= nil then
+      print("croned!"..desc.description)
+      desc.cron()
+    end
+  end
+
+  -- Called again in 5 mins
+  postpone (cron_plugins, false, 5*60.0)
+end
\ No newline at end of file
diff --git a/plugins/ping.lua b/plugins/ping.lua
index 88bc2c5..553d9e4 100644
--- a/plugins/ping.lua
+++ b/plugins/ping.lua
@@ -1,12 +1,21 @@
-function run(msg, matches)
-    local receiver = get_receiver(msg)
-    print('receiver: '..receiver)
-    return "pong"
+socket = require("socket")
+
+function cron()
+	-- Checks a TCP connexion
+	-- Use yours desired web and id
+	local addr = "your.web.site"
+	local dest = "user#id"..our_id 
+    if not socket.connect(addr, 80) then 
+    	local text = "ALERT: "..addr.." is offline"
+    	print (text)
+    	send_msg(dest, text, ok_cb, false)
+    end
 end
 
 return {
-    description = "bot sends pong", 
-    usage = "!ping",
-    patterns = {"^!ping$"}, 
-    run = run 
+    description = "If domain is offline, send msg to peer",
+    usage = "",
+    patterns = {},
+    run = nil,
+    cron = cron
 }