Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
The code in FP-SNS-ALLMEMS1 is better than that in the 3 example programs (en.stsw-stlkt01). It reconnects better and explains the boot loader configuration much better! Which source are you starting with?