diff --git a/src/drivers/ets_airspeed/ets_airspeed.cpp b/src/drivers/ets_airspeed/ets_airspeed.cpp
index a24bd78a5e..2e32ed3341 100644
--- a/src/drivers/ets_airspeed/ets_airspeed.cpp
+++ b/src/drivers/ets_airspeed/ets_airspeed.cpp
@@ -282,7 +282,7 @@ start(int i2c_bus)
 	if (g_dev == nullptr)
 		goto fail;
 
-	if (OK != g_dev->init())
+	if (OK != g_dev->Airspeed::init())
 		goto fail;
 
 	/* set the poll rate to default, starts automatic data collection */
diff --git a/src/drivers/meas_airspeed/meas_airspeed.cpp b/src/drivers/meas_airspeed/meas_airspeed.cpp
index 6603d3452d..f31dc857de 100644
--- a/src/drivers/meas_airspeed/meas_airspeed.cpp
+++ b/src/drivers/meas_airspeed/meas_airspeed.cpp
@@ -278,7 +278,7 @@ namespace meas_airspeed
 #endif
 const int ERROR = -1;
 
-MEASAirspeed	*g_dev;
+MEASAirspeed	*g_dev = nullptr;
 
 void	start(int i2c_bus);
 void	stop();
@@ -300,47 +300,47 @@ start(int i2c_bus)
 	/* create the driver, try the MS4525DO first */
 	//g_dev = new MEASAirspeed(i2c_bus, I2C_ADDRESS_MS4525DO);
 
-		{
+		
 	int bus = PX4_I2C_BUS_EXPANSION;
 	//delete g_dev;
 
 	// XXX hack scan all addresses
-	for (int i = 1; i < 0xFF / 2; i++) {
-		warnx("scanning addr (7 bit): %0x", i);
+	for (int i = 0x20 / 2; i < 0xFE / 2; i++) {
+		warnx("scanning addr (7 bit): 0x%02x", i);
 		g_dev = new MEASAirspeed(bus, i);
 		warnx("probing");
-		if (OK == g_dev->init()) {
+		if (OK == g_dev->Airspeed::init()) {
 			warnx("SUCCESS!");
+			usleep(200000);
 			exit(0);
 		} else {
+			warnx("FAIL!");
+			usleep(200000);
 			delete g_dev;
 		}
 
 	}
 
-	// bus = PX4_I2C_BUS_ESC;
+	bus = PX4_I2C_BUS_ESC;
 
-	// for (int i = 1; i < 0xFF / 2; i++) {
-	// 	warnx("scanning addr (7 bit): %0x", i);
-	// 	g_dev = new MEASAirspeed(bus, i);
-	// 	if (OK == g_dev->init()) {
-	// 		warnx("SUCCESS!");
-	// 		exit(0);
-	// 	} else {
-	// 		delete g_dev;
-	// 	}
-
-	// }
+	for (int i = 1; i < 0xFF / 2; i++) {
+		warnx("scanning addr (7 bit): %0x", i);
+		g_dev = new MEASAirspeed(bus, i);
+		if (OK == g_dev->Airspeed::init()) {
+			warnx("SUCCESS!");
+			exit(0);
+		} else {
+			delete g_dev;
+		}
 
-	exit(1);
-}
+	}
 
 	/* check if the MS4525DO was instantiated */
 	if (g_dev == nullptr)
 		goto fail;
 
 	/* try the MS5525DSO next if init fails */
-	if (OK != g_dev->init())
+	if (OK != g_dev->Airspeed::init())
 		delete g_dev;
 		g_dev = new MEASAirspeed(i2c_bus, I2C_ADDRESS_MS5525DSO);
 
@@ -349,7 +349,7 @@ start(int i2c_bus)
 		goto fail;
 
 	/* both versions failed if the init for the MS5525DSO fails, give up */
-	if (OK != g_dev->init())
+	if (OK != g_dev->Airspeed::init())
 		goto fail;
 
 	/* set the poll rate to default, starts automatic data collection */