This is an simple example to send the data to the MQTT broker using W7500 ECO module

Dependencies:   MQTT WIZnetInterface mbed

Fork of W7500_ECO_Sending_String_to_MQTT_Broker by HARSHA B.M

Revision:
0:5db3b5b4ae2e
Child:
1:9c13b9f1f2b3
diff -r 000000000000 -r 5db3b5b4ae2e main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 06 11:28:02 2018 +0000
@@ -0,0 +1,53 @@
+#include "mbed.h"
+#include "SPI.h"
+#include "MQTTEthernet.h"
+#include "MQTTClient.h"
+
+#define ECHO_SERVER_PORT   7
+ 
+Serial pc(USBTX, USBRX);   //Enabling the Serial transmission between WIZ750SR and PC.
+char c[100]="Hello testing";
+ 
+int main(void) {
+    printf("Wait a second...\r\n");
+    char* topic = "ack";                    //if we are subscribing the acknowledgement.
+    MQTTEthernet ipstack = MQTTEthernet();
+    
+    MQTT::Client<MQTTEthernet, Countdown> client = MQTT::Client<MQTTEthernet, Countdown>(ipstack);
+    
+    char* hostname = "iot.eclipse.org";   //Give the IP Address of the MQTT Broker.
+    int port = 1883;                  // Port number of the MQTT broker.  
+    
+ 
+    int rc = ipstack.connect(hostname, port);
+    if (rc != 0)
+    printf("rc from TCP connect is %d\n", rc);
+    printf("Topic: %s\r\n",topic);
+    
+    MQTTPacket_connectData data = MQTTPacket_connectData_initializer;       
+    data.MQTTVersion = 3;
+    data.clientID.cstring = "Gintama";
+
+    if ((rc = client.connect(data)) == 0)
+    printf("rc from MQTT connect is %d\n", rc);
+   
+                              
+   while (true) {
+  
+     pc.printf("The value Sent to MQTT is: %s \n ",c);
+     MQTT::Message message;
+     char buf[100];
+     sprintf(buf, "%s", c);
+     message.qos = MQTT::QOS0;
+         message.retained = false;
+         message.dup = false;
+
+         message.payload = (void*)c;
+         message.payloadlen = strlen(c);
+
+         rc = client.publish("hellooo", message);
+        // pc.printf("Rc result: %c \n ",rc);
+         client.yield(60);
+         wait(60);
+    }
+}