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Need to keep functions generic for GPIOs
What is providing the RSSI signal? What is the form of the data (Need to ask Aidan Bowers)
Related hardware: An RC Link
RFD900.
https://files.rfdesign.com.au/Files/documents/Software manual.pdf
Need to see how RFD900 sends RSSI signals and how it interfaces with the actual flight controller. Then can determine what signal needs to be "decoded"
Will the PPM driver be what calls the RSSI module?
(2021 year was PWM, this year 2022 will need to look into RFD900)
We are no longer using singleton, need to get rid of that
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