diff --git a/arduino/beken-72xx/cores/arduino/wiring.c b/arduino/beken-72xx/cores/arduino/wiring.c
index c40aa35..03135ee 100644
--- a/arduino/beken-72xx/cores/arduino/wiring.c
+++ b/arduino/beken-72xx/cores/arduino/wiring.c
@@ -26,7 +26,15 @@ unsigned long micros() {
 	return millis() * 1000;
 }
 
+static unsigned long lastHeapLog = 0;
+
 void yield() {
+#if LT_LOG_HEAP
+	if (millis() - lastHeapLog > 1000) {
+		LT_HEAP_I();
+		lastHeapLog = millis();
+	}
+#endif
 	vTaskDelay(1);
 	taskYIELD();
 }