STM32WB55CGU6 Custom Board, Not able to connect with STM32CubeProgrammer

[PaulC]

Hello All,

We have made a custom board design with STM32WB55CGU6.

But we are struggling to detect the device with STM32CubeProgrammer. I am using P-NUCLEO-WB55's ST-LINK connection to detect and flash the M0 Firmware with STM32CubeProgrammer.

SWDIO, SWCLK, RESET, GROUND and Power connections are fine.

Could some experts suggest how to go ahead?

Thanks and regards,

Paul