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Expansion board for Raspberry Pi 4 Model B that eliminates the need for a direct wired connection of radio equipment to GPIO when working with rpitx or rpitx-ui packages. Now, you can use coaxial SMA output, switchable filters, and built-in LNA on one board!
LNA bias values currently need to be entered manually into the SPF SHIELD GUI. These values need to be looked up in as-built documentation, which is an extra step allowing human error. This code extracts the relevant data in a format that SHIELD can autopopulate the LNA bias fields.