Rewrite client-with-wifi.ino

examples/client-with-wifi/client-with-wifi.ino

@@ -1,7 +1,21 @@
 #include <TinyMqtt.h>   // https://github.com/hsaturn/TinyMqtt
 
 /** 
-  * Local broker that accept connections and two local clients
+  * 
+  *  +-----------------------------+
+  *  | ESP                         |
+  *  |                 +--------+  | 1883 <--- External client/s
+  *  |       +-------->| broker |  | 1883 <--- External client/s
+  *  |       |         +--------+  |
+  *  |       |             ^       |
+  *  |       |             |       |
+  *  |       v             v       |
+  *  | +----------+  +----------+  |
+  *  | | internal |  | internal |  |
+  *  | | client   |  | client   |  |
+  *  | +----------+  +----------+  |
+  *  |                             |
+  *  +-----------------------------+
   * 
   * pros - Reduces internal latency (when publish is received by the same ESP)
   *      - Reduces wifi traffic
@@ -12,11 +26,6 @@
   * cons - Takes more memory
   *      - a bit hard to understand
   *
-  * This sounds crazy: a mqtt mqtt that do not need a broker !
-  *  The use case arise when one ESP wants to publish topics and subscribe to them at the same time.
-  *  Without broker, the ESP won't react to its own topics.
-  *  
-  *  TinyMqtt mqtt allows this use case to work.
   */
 
 #include <my_credentials.h>
@@ -58,7 +67,7 @@ void setup()
 
 void loop()
 {
-	broker.loop();
+  broker.loop();  // Don't forget to add loop for every broker and clients
 
   mqtt_a.loop();
   mqtt_b.loop();