I managed to get the HC05 Bluetooth Module (on a ZS-040 Adapterboard) working on my Seriously Pro Racing F3 Evolution flight Controller.
i had to pull PIN34 on the HC05 to HIGH to get into “Full AT+Mode” change the UART Baudrate to 115200 via
(HC05) RXD-T1 (SPf3 UART1)
(HC05) TXD-R1 (SPf3 UART1)
(HC05) VCC-5V (SPf3 5V RAIL)
(HC05) GND-GND (SPf3 GND RAIL)
finally go into Cleanflight, Port tab and activate MSP on Port1 with 115200