Alasdair Allan, author of iOS Sensor Apps with Arduino, is presenting an iOS Sensors and External Hardware Masterclass in London in October:

This one day course will guide you through developing location aware applications for the iOS platforms that make use of the onboard sensors: the 3-axis accelerometer, the magnetometer, the gyroscope, the camera and the GPS. You’ll learn how to make use of these onboard sensors and combine them to build sophisticated location aware applications. You’ll also learn how to extend the reach of the on-board sensors by connecting your iOS device to external hardware.

We’ll look at how to connect the Arduino microcontroller platform to your iOS device, and build simple applications to control the board and gather measurements from sensors connected to it, directly from iOS. This course will give you the background to build your own applications independently, using the hottest location-aware technology yet for any mobile platform.

For pricing, registration, and more information, see Sensor Workshops.