This data transfer kit incorporates level shifting and USB conversion circuitry to make the logic level signals from the altimeter compatible with standard USB ports.
The data are transferred in a proprietary binary format with block acknowledge, so a terminal emulator program can NOT be used. Suitable MacOS and Windows compatible software is available on the PerfectFlite web site for free download. The altimeter's data connector provides and expects TTL level signals as described in the diagram below, and the mating data transfer adapter converts these to standard RS-232 serial levels.
I mean its going mach .31, not too fast and i dont think i will have a problemIf I were to use a BMP085 barometric pressure sensor, then what would be a example of the code to lets say read the pressure at startup, set that at zero and actuate the parachute at 50meters. If i can get that much info, believe i could pull it off
The interface is 5V TTL RS232 that you should be able to connect directly to the arduino RX line. You can probably get by without connecting the arduino's TX line