MQTT / MQTT

An API for using MQTT over multiple transports

Dependencies:   FP MQTTPacket

Dependents:   Cellular_HelloMQTT IoTStarterKit GSwifiInterface_HelloMQTT IBMIoTClientEthernetExample ... more

This library is part of the EclipseTM Paho project; specifically the embedded client.

The goals of this API are:

  1. to be independent of any system library: hence templates parameters for networking, timer and threading classes
  2. not to rely on heap storage, only automatic (I think this is a good thing)
  3. to limit memory use, for instance by defining the size of the buffers and arrays used at object creation time

MQTTmbed.h

Committer:
Ian Craggs
Date:
2017-11-02
Revision:
59:9cff7b6bbd01
Parent:
52:3f9919941b86

File content as of revision 59:9cff7b6bbd01:

#if !defined(MQTT_MBED_H)
#define MQTT_MBED_H

#include "mbed.h"

class Countdown
{
public:
    Countdown() : t()
    {
  
    }
    
    Countdown(int ms) : t()
    {
        countdown_ms(ms);   
    }
    
    
    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;
    unsigned long interval_end_ms; 
};

#endif