diff --git a/inferium-harvester.lua b/inferium-harvester.lua
index 1a9c455..bff75f8 100644
--- a/inferium-harvester.lua
+++ b/inferium-harvester.lua
@@ -1,18 +1,21 @@
+local net = require('libs/net')
 local utils = require('libs/utils')
 local turtleUtils = require('libs/turtle-utils')
 local config = require('config/harvesting')
 
-local VERSION = "1.0.1"
+local VERSION = "2.0.0"
+local INFERIUM_SERVER = 'inferium.com'
 local IDLE_TIME = 2
 local WAIT_ITEM_IDLE_TIME = 5
+local NETWORK_TIMEOUT = 4
 local MIN_FUEL_NEEDED = (100 + config.firstCropZ + config.length) * 2
 local MIN_FREE_SLOTS_BEFORE_COMPACT = 4
-local INFERIUM_QUERY_PORT = 111
-local INFERIUM_REPLY_PORT = 112
 
 -- a table with the list of current crops
 local localPlan = nil
 
+local previouslyFetchedRemotePlan = nil
+
 -- UTILS
 
 local function removeFirst(t, x)
@@ -73,7 +76,7 @@ local function getSeedNameFromCropName(cropName)
   return string.gsub(cropName, 'crop', 'seeds')
 end
 
-function isSeed(item)
+local function isSeed(item)
   local tags = item and item.tags or {}
   return tags['forge:seeds'] or tags['mysticalagriculture:seeds'] or false
 end
@@ -263,37 +266,21 @@ local function retrieveLocalPlan()
   goBackToHome()
 end
 
--- TODO: fetch retry + timeout ?
 local function fetchRemotePlan()
-  local modem = peripheral.find("modem")
-
-  if not modem then
-    error('no modem found')
-  end
-
-  modem.open(INFERIUM_REPLY_PORT)
-
   local message = { type = 'getplan', payload = { computerId = os.getComputerID() } }
-  modem.transmit(INFERIUM_QUERY_PORT, INFERIUM_REPLY_PORT, textutils.serialize(message))
 
-  local channel, replyRawMessage
-  repeat
-    _, _, channel, _, replyRawMessage = os.pullEvent("modem_message")
-  until channel == INFERIUM_REPLY_PORT
+  while true do
+    local replyMessage, _ = net.sendQuery(INFERIUM_SERVER, message, NETWORK_TIMEOUT)
 
-  modem.close(INFERIUM_REPLY_PORT)
+    if replyMessage and replyMessage.payload then
+      previouslyFetchedRemotePlan = replyMessage.payload
+      return replyMessage.payload
+    elseif previouslyFetchedRemotePlan then
+      return previouslyFetchedRemotePlan
+    end
 
-  if not replyRawMessage then
-    error('empty response from the server')
+    os.sleep(IDLE_TIME)
   end
-
-  local replyMessage = textutils.unserialize(replyRawMessage)
-
-  if replyMessage and replyMessage.payload then
-    return replyMessage.payload
-  end
-
-  error('message received but there is no payload: ' .. replyRawMessage)
 end
 
 local function removeSeeds(seeds)
@@ -434,6 +421,8 @@ end
 
 -- Main procedure
 local function main()
+  net.openRednet()
+
   print("Starting Trap's inferium harvester v" .. VERSION)
 
   turtleUtils.refuelAllFromInventory()
@@ -454,6 +443,8 @@ local function main()
     harvestProcedure()
     goBackToHome()
   end
+
+  net.closeRednet()
 end
 
 main()
\ No newline at end of file
diff --git a/inferium-server.lua b/inferium-server.lua
index 5009167..e80285d 100644
--- a/inferium-server.lua
+++ b/inferium-server.lua
@@ -1,58 +1,72 @@
+local net = require('libs/net')
 local inferiumPlans = require('config/inferium-plans') -- temporary default plan
 
-local VERSION = "0.3.0"
+local INFERIUM_SERVER = 'inferium.com'
+local UPGRADE_SCRIPT = '/upgrade.lua'
+local VERSION = "0.5.0"
 
-local INFERIUM_QUERY_PORT = 111
-local INFERIUM_REPLY_PORT = 112
-
-local defaultPlan = inferiumPlans.default or error('no default plan provided in config')
-
-local modem = peripheral.find("modem") or error("No modem attached", 0)
-
-modem.open(INFERIUM_QUERY_PORT)
+local defaultPlan = inferiumPlans.default or error('no default plan provided in config', 0)
 
 local function getPlanForComputer(computerId)
   return inferiumPlans[tostring(computerId)]
 end
 
-local function messageReceived(message)
+local function getPlan(computerId)
+  if not computerId == nil then
+    print('getplan error: no computerId found')
+    return nil
+  end
+
+  local plan = getPlanForComputer(computerId)
+
+  if not plan then
+    print('getplan warning: no plan found for computerID ' .. tostring(computerId))
+    plan = defaultPlan
+  end
+
+  return {
+    type = "getplan/response",
+    payload = plan
+  }
+end
+
+local ROUTES = {
+  ['getplan'] = function(_, computerId) return getPlan(computerId) end,
+  ['exit-server'] = function(_, _, stopServer) stopServer() ; return true end,
+  ['upgrade-server'] = function() shell.execute(UPGRADE_SCRIPT) ; return true end,
+}
+
+local function handleMessage(message, computerId)
   if message.type == 'getplan' then
-    local payload = message.payload or {}
-    local computerId = payload.computerId
-
-    if not computerId == nil then
-      print('getplan error: no computerId found in received payload')
-      return nil
-    end
-
-    local plan = getPlanForComputer(computerId)
-
-    if not plan then
-      print('getplan warning: no plan found for computerID ' .. tostring(computerId))
-      plan = defaultPlan
-    end
-
-    return {
-      type = "getplan/response",
-      payload = plan
-    }
+    return getPlan(computerId)
+  elseif message.type == 'exit-server' then
+    stopServer()
+    return true
+  elseif message.type == 'upgrade-server' then
+    shell.execute('/upgrade.lua')
+    return true
   end
 end
 
+net.openRednet()
 print('> inferium server v' .. VERSION .. ' listening on port ' .. INFERIUM_QUERY_PORT)
 
-while true do
-  local _, _, channel, replyChannel, rawMessage, _ = os.pullEvent("modem_message")
-
-  if channel == INFERIUM_QUERY_PORT and replyChannel == INFERIUM_REPLY_PORT then
-    local message = textutils.unserialize(rawMessage)
-    local replyMessage = messageReceived(message)
-
-    if replyMessage then
-      local rawReplyMessage = textutils.serialize(replyMessage)
-      modem.transmit(INFERIUM_REPLY_PORT, INFERIUM_QUERY_PORT, rawReplyMessage)
-    else
-      print('warning: unknown message received')
-    end
+net.listenQuery(INFERIUM_SERVER, function(message, computerId, stopServer)
+  if type(message) ~= table then
+    print('error: malformed message received', textutils.serialize(message))
+    return {}
   end
-end
\ No newline at end of file
+
+  local router = ROUTES[message.type]
+
+  if not router then
+    print('warning: unknown type of message received', message.type)
+    return {}
+  end
+
+  return router(message, computerId, stopServer)
+end)
+print('> server stopped')
+
+net.closeRednet()
+print('> rednet closed')
\ No newline at end of file