use channel

src/interface.jl

@@ -241,12 +241,12 @@ end
 """
     mqtt communication loop, call this function manually 
 """
-function mqttRun(client::mqttClient)
+function mqttRun(client::mqttClient, storeResult::Channel)
     mqttLoop!(client)
     mqttCheckConnection!(client)
     mqttReconnect!(client)
     mqttSubOnConnect!(client)
-    return mqttOnmessage!(client)
+    mqttOnmessage!(client, storeResult)
 end
 
 
@@ -260,28 +260,26 @@ end
     end
 
 """
-function mqttOnmessage!(client::mqttClient)
+function mqttOnmessage!(client::mqttClient, storeResult::Channel)
     nmessages = Base.n_avail(get_messages_channel())
     nmessages == 0 && return nothing
-
-    timepass = (Dates.now() - client.boottime).value / 1000.0
     
-    if timepass <= 1 && client.retainedMsgCleared == false
+    if client.retainedMsgCleared == false
         # discard all retained message
         for i = 1:nmessages
             _ = take!(get_messages_channel()) # discard new arrival package
         end
-    elseif timepass > 1 && client.retainedMsgCleared == false
         client.retainedMsgCleared = true
         println("retained mqtt messages cleared")
-    else
+    elseif client.retainedMsgCleared
         for i = 1:nmessages
             pkg = take!(get_messages_channel()) # take new arrival package
             # sptoptic = split(topic, "/")
             payload = vecToDict(pkg.payload)    # payload in Dict format
-            
-            return pkg.topic, payload
+            put!(storeResult, (topic=pkg.topic, payload=payload))
         end
+    else
+        error("undefined condition")
     end
 end