Flow driver: Handle rotation parameter if present

src/drivers/px4flow/px4flow.cpp

@@ -62,6 +62,7 @@
 
 #include <systemlib/perf_counter.h>
 #include <systemlib/err.h>
+#include <systemlib/param/param.h>
 
 #include <conversion/rotation.h>
 
@@ -255,6 +256,17 @@ PX4FLOW::init()
 	/* sensor is ok, but we don't really know if it is within range */
 	_sensor_ok = true;
 
+	/* get rotation */
+	param_t rot = param_find("SENS_FLOW_ROT");
+
+	/* only set it if the parameter exists */
+	if (rot != PARAM_INVALID) {
+		int32_t val = 0;
+		param_get(rot, &val);
+
+		_sensor_rotation = (enum Rotation)val;
+	}
+
 	return ret;
 }