mqttreceiver added

ringbuffer.c

@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <pthread.h>
+#include <stdio.h>
 
 #include "ringbuffer.h"
 
@@ -9,6 +10,7 @@ void ringbufferInit(t_ringbuffer *handle) {
     handle->bufferWriteIdx = 0;
     pthread_mutex_init(&(handle->eventMutex), NULL);
     pthread_cond_init(&(handle->eventSignal), NULL);
+    fprintf(stderr, "ringbuffer initialized\n");
 }
 
 void ringbufferPut(t_ringbuffer *handle, void *f) {