Hi I'm trying to connect NUCLEO-H755ZI-Q with X-NUCLEO-WB05KN via usart. I'm using usart2 (pd3, pd4, pd5, pd6) on the host board and CN7 on the shield. BLE initialisation fails if I set `hw-flow-control` in Zephyr in devicetree. Without flow control and with the same connection, it works fine. I'm using BLE_TransparentMode_UART_with_Updater from X-CUBE-wb05n. I tried soldering SB10 and SB11, but to no avail. It would be great to have a full datasheet with a detailed description of all interfaces and how they work, the only document I could find is UM3355, which is not very helpful.
