Bohyun Bang / w7500-paho-mqtt

Paho MQTT Client example with W7500

Dependencies:   DHT MQTTforLecture WIZnetInterface mbed-src

Fork of w7500-paho-mqtt by Bohyun Bang

Code

WIZwiki W7500 with paho mqtt client.

Import programw7500-paho-mqtt

Paho MQTT Client example with W7500

Last commit 21 Sep 2015 by Bohyun Bang

You have to change

You have to use your ethernet(network) information.

MQTTEthernet.h

    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x00, 0x00, 0x00}; // your mac address
    const char * ip_addr = "???.???.???.???"; // your ip
    const char * gw_addr = "???.???.???.???"; // your gateway
    const char * snmask = "???.???.???.???"; // your subnetmask

And you have to use your mqtt broker server information. Broker server ip address and port number listed bleow are available now. But I will close the mqtt broker server on July 15,2015.

main.cpp

    char* hostname = "104.199.146.45";
    int port = 1883;

Platform

WIZwiki W7500 [ https://developer.mbed.org/platforms/WIZwiki-W7500/ ] /media/uploads/bangbh/wizwiki-w7500.jpg

Component

YWRobot Easy module shield [ where to buy ] (This is not mbed component) /media/uploads/bangbh/ywrobot_esay-module-shield-v1.jpg

Test software

PC

MQTT-FX - A JavaFX based MQTT Client [ Home page ] /media/uploads/bangbh/mqtt-fx.png

Mobile(iPhone)

ZMQTT-UTILITY - MQTT Test utility|You can download from App store(iPhone). /media/uploads/bangbh/iphone-zmqtt-utility.png

main.cpp@7:a5ead1402704, 2015-05-04 (annotated)

Committer:
mbedAustin
Date:
Mon May 04 22:47:02 2015 +0000
Revision:
7:a5ead1402704
Parent:
3:36fd3cfad85a
Child:
8:f837e0d255e8
updated example code to be more verbose

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:38cbb854d85f 1 #include "mbed.h"
emilmont 1:5cebe0e38cd2 2 #include "EthernetInterface.h"
emilmont 1:5cebe0e38cd2 3
emilmont 3:36fd3cfad85a 4 #define ECHO_SERVER_PORT 7
emilmont 3:36fd3cfad85a 5
emilmont 1:5cebe0e38cd2 6 int main (void) {
emilmont 1:5cebe0e38cd2 7 EthernetInterface eth;
emilmont 1:5cebe0e38cd2 8 eth.init(); //Use DHCP
emilmont 1:5cebe0e38cd2 9 eth.connect();
mbedAustin 7:a5ead1402704 10 printf("\nServer IP Address is %s\n", eth.getIPAddress());
emilmont 1:5cebe0e38cd2 11
emilmont 1:5cebe0e38cd2 12 TCPSocketServer server;
emilmont 3:36fd3cfad85a 13 server.bind(ECHO_SERVER_PORT);
emilmont 3:36fd3cfad85a 14 server.listen();
emilmont 1:5cebe0e38cd2 15
emilmont 1:5cebe0e38cd2 16 while (true) {
emilmont 1:5cebe0e38cd2 17 printf("\nWait for new connection...\n");
emilmont 1:5cebe0e38cd2 18 TCPSocketConnection client;
emilmont 1:5cebe0e38cd2 19 server.accept(client);
emilmont 3:36fd3cfad85a 20 client.set_blocking(false, 1500); // Timeout after (1.5)s
emilmont 1:5cebe0e38cd2 21
emilmont 1:5cebe0e38cd2 22 printf("Connection from: %s\n", client.get_address());
emilmont 1:5cebe0e38cd2 23 char buffer[256];
emilmont 1:5cebe0e38cd2 24 while (true) {
emilmont 3:36fd3cfad85a 25 int n = client.receive(buffer, sizeof(buffer));
emilmont 1:5cebe0e38cd2 26 if (n <= 0) break;
emilmont 1:5cebe0e38cd2 27
mbedAustin 7:a5ead1402704 28 // print received message to terminal
mbedAustin 7:a5ead1402704 29 buffer[n] = '\0';
mbedAustin 7:a5ead1402704 30 printf("Received message from Client :'%s'\n",buffer);
mbedAustin 7:a5ead1402704 31
mbedAustin 7:a5ead1402704 32 // reverse the message
mbedAustin 7:a5ead1402704 33 char temp;
mbedAustin 7:a5ead1402704 34 for(int f = 0, l = n-1; f<l; f++,l--){
mbedAustin 7:a5ead1402704 35 temp = buffer[f];
mbedAustin 7:a5ead1402704 36 buffer[f] = buffer[l];
mbedAustin 7:a5ead1402704 37 buffer[l] = temp;
mbedAustin 7:a5ead1402704 38 }
mbedAustin 7:a5ead1402704 39
mbedAustin 7:a5ead1402704 40 // print reversed message to terminal
mbedAustin 7:a5ead1402704 41 printf("Sending message to Client: '%s'\n",buffer);
mbedAustin 7:a5ead1402704 42
mbedAustin 7:a5ead1402704 43 // Echo received message back to client
emilmont 2:ec5ae99791da 44 client.send_all(buffer, n);
emilmont 1:5cebe0e38cd2 45 if (n <= 0) break;
emilmont 1:5cebe0e38cd2 46 }
emilmont 3:36fd3cfad85a 47
emilmont 1:5cebe0e38cd2 48 client.close();
emilmont 1:5cebe0e38cd2 49 }
emilmont 1:5cebe0e38cd2 50 }