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@DavidSAlexander DavidSAlexander released this 17 Dec 06:59
· 5 commits to main since this release
1.0.3
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STM32RomWebFlasher V1.0.3

First public release of STM32RomWebFlasher — a browser-based firmware flashing workflow for STM32 MCUs using the built-in System ROM Bootloader over UART, powered by an ESP8266.

Highlights

  • Web UI (LAN-based flashing): Upload a .bin file from your browser and program STM32 without external PC flashing tools during updates.
  • LittleFS storage: Firmware is stored on the ESP8266 as /update.bin and then streamed to the STM32 bootloader.
  • mDNS support: Access the UI via http://stm32flasher.local/ (hostname configurable).
  • Login protection: Simple credential-based login to prevent accidental access on shared networks.
  • One-click operations: Full Update (erase + program + jump), Erase Only, Program Only, Jump to App, Read Version/Info, and RAM link test.
  • ROM bootloader protocol compatibility: Uses the STM32 bootloader USART protocol (8E1 commonly required).

Web UI Workflow

  1. Open the UI via IP or mDNS
  2. Login
  3. Connect Target (ESP8266 controls BOOT0/NRST and syncs bootloader)
  4. Upload update.bin to LittleFS
  5. Run commands (Erase / Program / Full Update / Jump / Info)

Notes / Requirements

  • Ensure correct wiring: BOOT0, NRST, UART TX/RX, and common GND
  • If you see “Missing final ACK”, verify boot mode/timing and UART parity/baud.

References

Assets 2
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