Yes, you should be able to just use the RX pin like this by setting the TX pin to GND. Keep in mind that there might be some extra work by controlling the nRF21540 like this, as adjusting the gain to what you'd like won't be as straightforward as using SPI control would be.
Yes, you should be able to just use the RX pin like this by setting the TX pin to GND. Keep in mind that there might be some extra work by controlling the nRF21540 like this, as adjusting the gain to what you'd like won't be as straightforward as using SPI control would be.
