The ESP8266’s bootloader output at 74880 baud is suppressed by the Arduino IDE, but not in PlatformIO. You will see that if you use that baud in both code and platformio.ini, the ‘weird’ characters are gone and bootloader messages.
The ESP8266’s bootloader output at 74880 baud is suppressed by the Arduino IDE, but not in PlatformIO. You will see that if you use that baud in both code and platformio.ini, the ‘weird’ characters are gone and bootloader messages.