this project aim to create a cutom Bootloader (BL) and application on the stm32wb55RG MCU, and use a custom script based on Xmodem protocol the old application via the cutom bootloader, just via UART and bypassing any special programmer like ST-Link.

Memory mapping

Program execution with custom bootloader and application before firmware update implementation

Transfer the update (binary file) to the stm32 via uart, and recieve it by the custom bootloader

Program execution after firmware update of the Application via the host pc and the custom bootloader on stm32wb55rg

General workflow with OTA support

Setup

Resources

*NUCLEO-WB55RG *User manual stm32wb55xx *PM0075 Programming manual *Flash Programming in STM32 using HAL (Erase, Write & Read) *FLASH Programming in STM32 Microcontrollers