Originally Posted by XJet
It strikes me that this manufacturer might be advised to bring out a little stand-alone programmer that can be plugged into the transmitter.
The programmer device could probably be manufactured and retailed for US$50 and it would allow "at the field" updates/changes to be made without recourse to a PC. A simple LCD display ($8), a microcontroller with USB interface ($5), some switches, a cable and a case ($10).
That would allow such a system to start competing with the low-end of the "big name" systems and might encourage more sales into clubs where someone already has this gear. ie: several people could share the one programmer if they needed to.
Actually I think the interface is standard rs-232, maybe even 5v ttl. The usb cable it comes with has a usb-rs232 converter in the usb end and shows up as standard com port on pc (virtual com port driver).
So it would be easy to reverse engineer the programmer protocol by capturing the serial data moving to and from the tx. Sounds like a good PICAXE project! All values are simple 0-100 integers, some signed so add a small eeprom and store 100's of planes. So many cool things to build and so little time.