Diff documents:
Crux3_Frsky_SPI_BF3.5.7
Crux3_Frsky_SPI_BF4.2.2
Crux3_SFHSS_SPI_BF4.2.2
Crux3_Flysky_SPI_BF4.2.2
Crux3_RXSR_BF4.2.2
Crux3_TBS_BF4.2.2
Crux3_DSMX_SPI_BF4.3.0DXS
How to use diff documents link
https://bit.ly/34Qa5a3
Firmware link:
Betaflight_3.5.7_CRAZYBEEF4FR Recommend for Crux3 SPI Frsky version
betaflight_4.2.2_STM32F411 Recommend for Crux3 SPI Flysky version/ RXSR version/ TBS version
betaflight_4.3.0_STM32F411_norevision_CrazybeeX DXSRecommend for Crux3 SPI DSM2/DSMX version