This book gives the appearance of serious, deep in the External Accessories Apple iPhone Accessories Framework and API?. You? Will learn how to create a new, integrated solution that combines an iPhone application with special hardware. The iPhone OS APIs Accessories iPhone developers to expand opportunities for innovative, allowing you to control and monitor external devices, whether you have built them their own or obtained from third parties?. What are you? Will learn to develop accessories and applications for the iPhone and iPod touch. Who this book is to This book is for iPhone and iPod touch developers who want to write applications to control external accessories and hardware developers who want to make accessories for the iPhone and iPod touch. This includes an embedded systems programmer who has been left out of the iPhone gold rush until now. OS iPhone Accessories iPhone developer API to expand the market again, and this book is for all developers who want to use the new API to control and monitor external devices? Is self-built or obtained from other sources.