we want to know how to connect SVI04 sensor for landing with PIXHAWK for my Quadcopter and what parameters we have to set.
That looks like a typical sonar rangefinder. They perform very poorly.
Information in the Wiki here. Id depends on whether it’s analog or I2C as to how it’s connected:
I’ve never seen this sonar before but a google search says that it is a radiolink I2C sonar so it probably uses the same driver as the Maxbotix I2C sonar.
I also have low expectations for this sonar.