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examples/02_subscribe_simple.jl

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+# Read 20 messages in topic "test/..." from the public broker test.mosquitto.org
+using Mosquitto
+
+# Connect to a broker, also starts loop if Threads.nthreads()>1
+client = Client("test.mosquitto.org", 1883)
+
+# subscribe to topic "test"
+subscribe(client, "test/#")
+
+function onmessage(nmin)
+    nmessages = Base.n_avail(Mosquitto.messages_channel)
+    nmessages == 0 && return 0
+
+    for i = 1:nmessages
+        temp = take!(Mosquitto.messages_channel)
+        println("Message $(nmin + i) of 20:")
+        println("\ttopic: $(temp.topic)\tmessage:$(String(temp.payload))")
+    end
+    return nmessages
+end
+
+# Messages will be put in
+# the channel Mosquitto.messages_channel.
+nmessages = 0
+while nmessages<20
+    # Take the message on arrival
+    loop(client)
+    nmessages += onmessage(nmessages)
+end
+
+# Close everything
+disconnect(client)