ESP8266 application for flashing STM8S microcontrollers via stm8-bootloader.

• Remote terminal - UART<->WiFi bridge
• File storage - store multiple firmware images in flash
• Web GUI - manage remote file storage and perform drag-and-drop uploads directly from browser

Precompiled binaries for ESP8266 and STM8S003 are located inside esp-stm8-flasher/firmware.

git clone --recursive https://github.com/lujji/esp-stm8-flasher

Create ./esp-stm8-flasher/esp-open-rtos/include/private_ssid_config.h with two macro definitions:

#define WIFI_SSID "mywifissid"
#define WIFI_PASS "my secret password"

Build and flash the firmware

make html && make -j4 flash

You may want to change a few things inside config.h:

• BLOCK_SIZE - STM8 flash block size. This should match bootloader configuration
• TELNET_PORT - remote terminal port
• RST_PIN - GPIO pin for resetting STM8

FLASH_SIZE and SPIFFS_SIZE are set in Makefile according to the flash size of the ESP8266 module.

STM8 bootloader should be compiled with BOOT_PIN set to PD6 - this way RX pin will be used to detect entry condition.

Uploading and flashing the firmware can be done either from Web GUI or the command-line utility:

python esfutil.py -p firmware.bin 192.168.100.6

This performs three operations: upload file to remote storage, flash the firmware, delete file from storage. Utility supports other commands for manipulating remote file system, see --help for more details. This utility requires websocket module, which can be installed via pip.

This project provides a buffered serial bridge. Default port is 23.

telnet 192.168.100.6 23