diff --git a/src/statemachine.cpp b/src/statemachine.cpp
index 03c5f51..e84c614 100644
--- a/src/statemachine.cpp
+++ b/src/statemachine.cpp
@@ -130,6 +130,16 @@ namespace sta
 				{
 					setLockoutTimer(lockout);
 				}
+
+				// get heap stats at the end of the state transition
+				HeapStats_t stats;
+				vPortGetHeapStats(&stats);
+
+				// Execute the user-defined callback.
+				sta::tacos::onStateTransition(transition.from, transition.to, transition.lockout);
+
+				// Start all new tasks and stop all the tasks that aren't supposed to be running.
+				updateThreads();
 			}
 		}