What are they, and why are they there?
Glad you asked and here is your answer:
http://www.edn.com/design/analog/44...-Transforming-navigation-and-fitness-tracking
Today’s smartphones utilize a wide array of accelerometers, gyroscopes and various other sensors in their designs. Relatively unknown is the barometric pressure sensor, which measures air pressure. These sensors are currently being integrated into premium-grade smartphones, but are also becoming more common in mainstream phones or wearables such as fitness trackers and Internet of Things (IoT) applications.
I will let you read the article in the link. It goes on for 3 pages of good info.
Glad you asked and here is your answer:
http://www.edn.com/design/analog/44...-Transforming-navigation-and-fitness-tracking
Today’s smartphones utilize a wide array of accelerometers, gyroscopes and various other sensors in their designs. Relatively unknown is the barometric pressure sensor, which measures air pressure. These sensors are currently being integrated into premium-grade smartphones, but are also becoming more common in mainstream phones or wearables such as fitness trackers and Internet of Things (IoT) applications.
I will let you read the article in the link. It goes on for 3 pages of good info.