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Pyxida Rev. 4 was a minor revision completed during the 2017 Spring Semester. It includes an upgraded GPS module and support for active GPS antennas.

Revision 5:

Pyxida Rev. 5 was a major revision that included a new radio chip (CC1120) to replace the old xBee radio add on. Rev. 5 Also included a new breakout board expansion to allow more modules to be added to Pyxida without the need for an entire redesign and manufacturing of a new board. Breakout for this revision included a barometer breakout, programmer breakout, and pyro breakout. Unfortunately, this revision had several hardware issues (mostly related to manufacturing) that had to be resolved with a new revision.

Revision 6:

Pyxida Rev. 6 was a major revision completed during the 2018 Fall Semester. It includes a new breakout design using ribbon cables instead of pins to allow for more flexibility in placing breakouts in the avionics bay. It has a new radio chip (CC1200) and a radio amplifier (CC1190) to allow for longer range communication. It has a new backup battery system, and includes a LIPO charging feature, and allows for external batteries to be connected to Pyros if higher voltages are needed.

Firmware

Pyxida runs firmware written in Arduino-dialect C++. It follows a state machine architecture, with software objects that represent physical hardware. States are represented as objects that subclass a base state and provide functions for state entry, exit conditions and destinations, and system behavior while in the state. States can access hardware such as pyro channels and the board's radio through the previously-mentioned hardware objects and use these objects for input and output.

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