diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_function.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_function.h
index 80a9f80..7cd6cd8 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_function.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_function.h
@@ -17,6 +17,9 @@ void digitalWriteFast(uint8_t pin, uint8_t x) {
 void pulse() {
   digitalWriteFast(TRG_OUT, LOW);
   sensorHReading = 1;
+  #ifdef DEBUG
+    Serial.println("Trig!");
+  #endif
   delay(TRG_DUR);
   digitalWriteFast(TRG_OUT, HIGH);
 }