I’d like to add an software defined radio (SDR) or hat to the Raspberry Pi that’s included if possible. I’m guessing the rest of the components use the entire headers but I couldn’t tell from the time lapse. Nor does the description inform newbie me what’s available on Mycroft’s extendable backplate (that’s the version I backed).
RPiTx needs GPIO 18 and I’m not sure if that can be changed.
Plug a wire on GPIO 18, means Pin 12 of the GPIO header (header P1): this act as the antenna. Length depend on transmit frequency, but with few centimeters it works for local testing.
And the Sense Hat needs all of the pins.
In case you’re wondering why I need an SDR, I would like to control my radio controlled ceiling fan for my room (the fan is old and not standardised).