@ -26,7 +26,10 @@ A Bluefruit UART friend can be converted to an SPI friend, however this [require
<!-- FIXME: Document bluetooth support more completely. -->
## Bluetooth Rules.mk Options
Use only one of these
The currently supported Bluetooth chipsets do not support [N-Key Rollover (NKRO)](reference_glossary.md#n-key-rollover-nkro), so `rules.mk` must contain `NKRO_ENABLE = no`.