Connect to custom board STM32L053 - STLINK-V2 - SWD Posted by LaurentL on 2016-09-05 10:06 Hello, SW4STM32 need to connect under reset to not loose connection if the application uses low power modes or uses SWD lines as ios. So yo must connect the reset line from the STlink to the STM32 device nRst pin. Regards, Laurent