diff --git a/oil_sensor/include/SonarSensor.h b/oil_sensor/include/SonarSensor.h
index d4c6368..850a628 100644
--- a/oil_sensor/include/SonarSensor.h
+++ b/oil_sensor/include/SonarSensor.h
@@ -12,6 +12,7 @@ public:
 
 	void setup() {
 		pinMode(VCC_PIN, OUTPUT);
+		turnOff();
 	}
 
 	unsigned int scan() {
diff --git a/oil_sensor/src/oil_sensor.cpp b/oil_sensor/src/oil_sensor.cpp
index 0344311..ccd193d 100644
--- a/oil_sensor/src/oil_sensor.cpp
+++ b/oil_sensor/src/oil_sensor.cpp
@@ -10,8 +10,8 @@
 
 #include "SonarSensor.h"
 
-#define SEND_INTERVAL 37						// 37*8s = ~5min
-#define SEND_VCC_INTERVAL (SEND_INTERVAL*6)		// ~30min
+#define SEND_INTERVAL 450							// 450*8s = ~1 hour
+#define SEND_VCC_INTERVAL (SEND_INTERVAL*12)		// ~12 hours
 
 
 SonarSensor oilSensor(OIL_SENSOR);
@@ -22,7 +22,6 @@ volatile bool shouldSend = true;
 void setup() {
 	oilSensor.setup();
 	TinySwitch::setup(SENDER_PIN);
-	delay(10000);
 	TinyPower::setup();
 	TinyPower::enableWdt(WDTO_8S);
 }
@@ -31,7 +30,7 @@ void loop() {
 	if (shouldSend) {
 		shouldSend = false;
 		oilSensor.turnOn();
-		delay(1000);
+		delay(500);
 		unsigned int distance = oilSensor.scan();
 		oilSensor.turnOff();
 		if (distance) {