main.cpp

00001 #define APP_VERSION     0.6f
00002 #define MQTT_VERSION    3
00003 #define BROKER_NAME     "broker.hivemq.com"
00004 #define BROKER_PORT     1883
00005 
00006 #include "debounce_button.h"
00007 #include "EthernetInterface.h"
00008 #include "MQTTNetwork.h"
00009 #include "MQTTmbed.h"
00010 #include "MQTTClient.h"
00011 
00012 char* topic;
00013 
00014 /**
00015     TODO
00016     ----
00017     -   Check if the button has been pressed. If so, print the amount of clicks to a serial terminal.
00018     -   Make an MQTT-service which:
00019         -   starts up a network using EthernetInterface. Make sure the development board requests its address via DHCP.
00020         -   makes a client and connects it to the broker using a client ID and credentials (username & password).
00021         -   sends messages at the same topic as the smartphone app from PGO 2. Feel free to choose which Quality of Service
00022             you are going to use. Make a separate function which handles the sending procedure. Therefore, this function
00023             can be called each time we want to send a certain message.
00024     -   When the button is pressed once, we send an upvote. When pressed twice, a downvote is sent. By pressing 4 times,
00025         the program disconnects from the broker and terminates.
00026         
00027     Extra
00028     -----
00029     -   Subscribe to the topic on which the song data is published. Display this received message on the serial terminal.
00030     -   Test this controller in the complete system of PGO 2. Use these controllers instead of the smartphones.
00031     
00032     Tips & tricks
00033     -------------
00034     -   To generate an interrupt on the press of a button, use:
00035             InterruptIn button(USER_BUTTON);
00036             ...
00037             button.fall(callback(someFunction));
00038     -   Before implementing MQTT, test the multiclick feature first.
00039     -   Have a look at the MQTT-library for Mbed and the HelloMQTT-example.
00040     -   To have a uniform message sending procedure, use the following function usage:
00041             sendMessage(&client, topic, buf, qos, retained, duplicate)
00042 */
00043 
00044 int main(int argc, char* argv[])
00045 {
00046     InterruptIn button(USER_BUTTON);
00047     button.fall(callback(&button1_onpressed_cb));
00048     button1_busy = false;
00049     button1_enabled = true;
00050     button1_pressed = false;
00051     multiclick_state = 0;
00052 //    status_led = 0;   
00053     
00054     while(1){
00055             if(debounced_flag){
00056 //                printf("debounced \r\n");
00057 //                printf("clicks %d\r\n", multiclick_state);
00058 //                printf("button_enabled %d\r\n", button1_enabled);
00059 //                printf("button_busy %d\r\n", button1_busy);
00060                 debounced_flag = false;
00061                 
00062             }
00063 //                printf("button_enabled %d\r\n", button1_enabled);
00064             if(done_counting){
00065                 printf("counted %d \r\n", multiclick_state);
00066                 // handle click amount here
00067                 multiclick_state = 0;
00068                 done_counting = false;         
00069             }
00070     }
00071     
00072     return 0;
00073 }