This is a repository of BIGTREETECH bootloaders. The originals are stored under the bootloader_bin/backed_up_original_bootloaders/ directory. This repository also has a bootloader for the SKR E3 TURBO to fix the high pitch sound coming out of the CR10_STOCKDISPLAY it is located on the bootloder_bin/compiled_bootloader_bin/ directory.

ELFI (ELF over WIFI) is a FOTA ( Firmware Over The Air ) based software application, our application is following reliability, portability and configurability rules as well as the simple and efficient user experience.

Smart Power Case for FatShark goggles

Custom STM32xx bootloader for easy USB flashing

This is a repository that a custom stm32 secure bootloader is being developed.

XuNet OS is 32-bit operating system with XuNet Kernel built entirely from scratch using the custom XuNet kernel. Designed for simplicity, speed, and low-level learning, it includes its own bootloader, memory management, and a minimal command-line interface ideal for OS developers and enthusiasts exploring system internals

A simple STM32 baremetal bootloader code with support for standard C runtime environment set by the compiler.

PoC de gravação de firmware em STM32 via navegador usando Web Serial API e bootloader UART (AN3155).

USB DFU bootloader and sample application for STM32F411CEU6 (e.g. Black Pill board) with runtime DFU entry and separate memory mapping.

A simple, educational STM32L4 bootloader written in C, demonstrating firmware loading, CRC verification, and flash memory management. Includes a simulated flash interface, CRC32 checksum, and step-by-step logging. Ideal for learning bootloader fundamentals and preparing for embedded development projects.

基于USB接口与ymodem协议的STM32F4xx的Bootloader

UART firmware update Flash partitioning CRC verification rollback protection

Noobs guide for writing bootloader code for ARM Cortex-M for the STM32 MCU with HAL library in the STM32CubeIDE

A frimware upgrade medium based on STM32373xx to upload frimware through bootloader to the host device STMF405.

Firmware Over-The-Air (FOTA) System with STM32, Firebase, and ESP32

XuNet OS is 32-bit operating system with XuNet Kernel built entirely from scratch using the custom XuNet kernel. Designed for simplicity, speed, and low-level learning, it includes its own bootloader, memory management, and a minimal command-line interface—ideal for OS developers and enthusiasts exploring system internals