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

Diff: MQTT_mbed.h

Revision:
29:833386b16f3e
diff -r d13a6c558164 -r 833386b16f3e MQTT_mbed.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MQTT_mbed.h	Tue May 20 15:03:29 2014 +0000
@@ -0,0 +1,49 @@
+#if !defined(MQTT_MBED_H)
+#define MQTT_MBED_H
+
+#include "mbed.h"
+
+class Countdown
+{
+public:
+    Countdown()
+    {
+        t = Timer();   
+    }
+    
+    Countdown(int ms)
+    {
+        t = Timer();
+        countdown_ms(ms);   
+    }
+    
+    
+    bool expired()
+    {
+        return t.read_ms() >= interval_end_ms;
+    }
+    
+    void countdown_ms(int ms)  
+    {
+        t.stop();
+        interval_end_ms = ms;
+        t.reset();
+        t.start();
+    }
+    
+    void countdown(int seconds)
+    {
+        countdown_ms(seconds * 1000);
+    }
+    
+    int left_ms()
+    {
+        return interval_end_ms - t.read_ms();
+    }
+    
+private:
+    Timer t;
+    int interval_end_ms; 
+};
+
+#endif
\ No newline at end of file