Most of the development kits from ST are equipped with on-board STLink-V2 debugger / programmers, use of which is not very convenient in Linux environment. Instead, Segger kindly provides a tool that allows you to reflash on-board STLink into JLink . Process takes only seconds. And you can enjoy most of the great features of JLink with no cost at least for STM32 devices. It keeps the UART port function, so you can use it as a serial monitor in addition to the JLink. If you have a Nucleo-64 board handy, you can make a nice stand-alone JLink debugger by reflashing the on-board STLink and snap it off. Note that the original pin headers are removed and some of them are replaced with right-angle type for the convenience. Two of the pins of ST-Link jumper are used to provide 3.3V power. And TX and RX pins of UART are soldered at the back not to interfere with the debug pins. Note the small changes in the solder bridges SB3 through SB10. Basically this allows the 3V3 line to b