A Jailbroken Serial for iOS is an ObjectiveC wrapper for the UART interface, which is available on jailbroken iOS device.
This wrapper provides basic read/write command set with various pre-defined baud rate. Also, it provides both sync and async communication for a 'read' command (attention: although async mode is very convienient, but it will hog the CPU time on your device! It will continously check the read buffer thorugh whole running time).
For the detailed information, please visit my springnote page;
http://inornate.springnote.com/pages/8139470.xhtml
Note: springnote.com service is about to expire. If a manual above is not working, please download the attached zip file.