Keystone Developer / Mbed OS sara-n200-hello-mqtt-sn

Example project to publish messages to a MQTT-SN broker using the u-blox SARA-N200 NB-IoT modem

Dependencies:   MQTTSNPacket X-NUCLEO-SARA-N200

MQTTmbed.h

Committer:
KeystoneElectronic
Date:
2018-08-23
Revision:
12:9a2dab9b927d
Parent:
1:70b751b7a189

File content as of revision 12:9a2dab9b927d:

#if !defined(MQTT_MBED_H)
#define MQTT_MBED_H

#include "mbed.h"

class Countdown
{
public:
    Countdown()
    {
    	t = new Timer();
    	interval_end_ms = 0;
    }
    
    Countdown(int ms)
    {
    	t = new Timer();
        countdown_ms(ms);   
    }

    ~Countdown()
    {
    	delete t;
    }
    
    bool expired()
    {
        return t->read_ms() >= interval_end_ms;
    }
    
    void countdown_ms(unsigned long ms)  
    {
        t->stop();
        interval_end_ms = ms;
        t->reset();
        t->start();
    }
    
    void countdown(int seconds)
    {
        countdown_ms((unsigned long)seconds * 1000L);
    }
    
    int left_ms()
    {
        return interval_end_ms - t->read_ms();
    }
    
private:
    Timer *t;
    int interval_end_ms;
};

#endif