https://devzone.nordicsemi.com/f/nordic-q-a/27498/crc-error-on-nrf8001-porting-to-stm32Hello, I&#39;m porting the nRF8001 SDK to STM32 using HAL (CubeMX). Communication seems to run fine, however, the setup stops with CRC error. See abridged the logical output: ... C 6 :0x06,0xf0,0x00,0x03,0xbf,0x40, ...84/06/01 is repeated 6 timesen-USTelligent Community 13Thu, 23 Nov 2017 14:06:35 GMThttps://devzone.nordicsemi.com/thread/108604?ContentTypeID=1Thu, 23 Nov 2017 14:06:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4567ddf2-5016-4710-bdad-1ea3be8ae6b3David Edwin<p>CRC error during the ACI Setup typically points at checking the SPI configuration between the nRF8001 and the STM. Verify against section 7 in the nRF8001 product specification (<a href="http://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF8001).">www.nordicsemi.com/.../nRF8001).</a></p> <p>This question mentions the STM32 port <a href="https://devzone.nordicsemi.com/question/29190/nrf8001-setup/">devzone.nordicsemi.com/.../</a></p><div style="clear:both;"></div>