i just bought 4 nrf21540db's that I would like to use with Shockburst. My understanding is that the modes, etc are setup through gpio pins, but the power settings are done through spi.
I've looked at modified central_uart code from the blog, but I don't see a way to setup the FEM independently from the BT settings. Even in the code I don't see where it was ever evaluated above 8dbm... I'm sure it's just because I am missing something, but if there is a better source for me to reference can you point me to it or any advice is appreciated.
//#define TRANSMIT_POWER_dBm RADIO_TXPOWER_TXPOWER_Neg20dBm
//#define TRANSMIT_POWER_dBm RADIO_TXPOWER_TXPOWER_Neg12dBm
//#define TRANSMIT_POWER_dBm RADIO_TXPOWER_TXPOWER_0dBm
#define TRANSMIT_POWER_dBm RADIO_TXPOWER_TXPOWER_Pos8dBm
Comparing range with Bluetooth Low Energy of the nRF21540 DK and the nRF52840 DK
https://webinars.nordicsemi.com/introduction-to-the-nrf21540-rf-fem-4
