Check individual heartbeat frames for timeouts

Core/Inc/Slave_Monitoring.h

@@ -19,6 +19,7 @@
 #define NUMBEROFTEMPS 32
 
 #define SLAVETIMEOUT 500
+#define SLAVE_HEARTBEAT_FRAMES 11
 
 typedef struct {
 
@@ -28,6 +29,7 @@ typedef struct {
   uint32_t timestamp;
   uint8_t error;
   uint8_t timeout;
+  uint32_t frame_timestamps[SLAVE_HEARTBEAT_FRAMES];
 
 } SlaveHandler;