diff --git a/mqtt.lua b/mqtt.lua
index 845a6eb..67e0356 100644
--- a/mqtt.lua
+++ b/mqtt.lua
@@ -7,14 +7,14 @@ function startMqtt()
       if data ~= nil then
         print(data)
         if (data == "ON") then
-          mqttBrightness=100
+          briPercent=100
           m:publish(mqttPrefix .. "/clock", "ON", 0, 0)
         elseif (data == "OFF") then
-          mqttBrightness=0
+          briPercent=0
           m:publish(mqttPrefix .. "/clock", "OFF", 0, 0)
         else
           if (tonumber(data) >= 0 and tonumber(data) <= 100) then
-            mqttBrightness=tonumber(data)
+            briPercent=tonumber(data)
             m:publish(mqttPrefix .. "/clock", tostring(data), 0, 0)
           end
         end
@@ -22,7 +22,7 @@ function startMqtt()
     end)
     
     m:connect(mqttServer, 1883, 0, function(client)
-      print("[MQTT] connected")
+      print("MQTT is connected")
       mqttConnected = true
       -- subscribe topic with qos = 0
       client:subscribe(mqttPrefix .. "/command", 0)
@@ -38,7 +38,7 @@ if (mqttServer ~= nil and mqttPrefix ~= nil) then
     startMqtt()
     print "Started MQTT client"
 
-    tmr.alarm(5, 60000, 1 ,function()
+    tmr.alarm(5, 30000, 1 ,function()
          m:publish(mqttPrefix .. "/brightness", tostring(briPercent), 0, 0)
     end)
 end
\ No newline at end of file