@echo off
set firmware=firmware.bin
set ports=COM3 COM4 COM5
for %%p in (%ports%) do (
    start esptool.py --chip esp32 --port %%p write_flash 0x1000 %firmware%
)
echo Waiting for all flash operations to complete...
timeout /T 10 >nul
echo All ESP32 boards have been flashed.