What the command pipeline should do:

• Entering commands in the MCC frontend
  • Need to integrate the command API endpoints into frontend
  • Lockout phase, maybe 60s before a session
• Store command data in database
  • Command endpoints to store the data into database
  • Add delete endpoint, update endpoint
• Create packets with the commands entered
  • Can use build_queue to get pending commands from the command (backend/data/resources/commands_pipeline.py)
  • Can use queue_to_packets to make packets from the command queue (backend/data/resources/commands_pipeline.py)
  • Need to store the packet data, and the transactional data into database
    • Create the data layer functions to add contents to the transactional.packet and transactional.packet_commands table
• Send the packets to the microcontroller - Can refer heavily to Adityya’s CLI code. Just imagine an automated version of the CLI in backend/gs_cli/ground_station_cli.py
  • Need to periodically build packets from the database in the GS state machine
  • Need to send the packets to the OBC once we enter a session/scheduled time
  • Need to implement the comms state machine (similar to the GS CLI)
  • How to deploy the GS state machine
• Microcontroller executes command callbacks
  • Should be done, as long as the packets match the format

Sidequests

• Database security
  • ONLY allow API and GS State Machine programs to interact with the Database
    • Look into/research
• Database synchronization
  • Add a table for a flag when last time database is updated, make it so Frontend and GS State Mgr are aware of when their data needs to be updated
• Web sockets for direct communication between GS state machine and frontend
  • Speed or security concerns with using database as a middleman
  • RPC or other protocol
• Frontend can see packet contents
  • AX.25, AES, FEC decoding on frontend or something
• Frontend rehaul to view commands by session

Important notes:

• Frontend/FastAPI and the GS State Machine are separate programs
  • They communicate using the database
  • Both need database wrappers/layer functions