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Rocket ground control software for the Buckeye Space Launch Initiative (BSLI) at the Ohio State University

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ground-control

Rocket ground control software for the Buckeye Space Launch Initiative at the Ohio State University.

Contributing

Please do not push directly to this repo. Fork it, push your changes there, and make a pull request (PR).

Ideally PRs should be reviewed by at least one other person before merging.

Please work on a feature branch (create one if one doesn't exist) and only push to that branch. Please do not directly push to main or dev! Once features are stable we can merge them into dev. Once dev is stable we can merge it into main as a release.

Packet Specification

Format

Packets consist of a 6-byte header, zero or more variable-length payloads, and a 2-byte footer. The header consists of a 2-byte (short) payload type indicator and a 4 byte (float) timestamp. The header type indicator signifies which kinds of payloads are present. Each payload type cannot be present more than once. The ordering of payload types is decided beforehand, by convention. Each payload type must have a known length. The footer is a 2-byte (short) CRC for error checking purposes.

Type sizes

We use the sizes specified here.

Approximate packet sizes

Type Priority Payload Format Payload Size (bytes) Update Frequency
ARM_STATUS 1 bool[3] 3 lazy, immediate on change
ALTITUDE 1 float[2] 8 immediate
ACCELERATION 2 float[3] 12 immediate
GPS_COORDINATES 2 float[2] 8 lazy, immediate on major change
BOARD_TEMPERATURE 3 float[4] 16 lazy, immediate on major change
BOARD_VOLTAGE 3 float[4] 16 lazy, immediate on major change
BOARD_CURRENT 3 float[4] 16 lazy, immediate on major change
BATTERY_VOLTAGE 3 float[3] 12 lazy, immediate on major change
MAGNETOMETER 3 float[3] 12 lazy, immediate on major change
GYROSCOPE 3 float[3] 12 lazy, immediate on major change
GPS_SATELLITES 3 short 2 lazy, immediate on major change
GPS_GROUND_SPEED 3 float 4 lazy, immediate on major change

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Rocket ground control software for the Buckeye Space Launch Initiative (BSLI) at the Ohio State University

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