I have the ESP8266 and have already tried the versions 2.6.2, 2.7.3, and 2.7.4. Nothing worked and all got was the same error:
Serial port COM3 Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last): File "C:\Users\mauru\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2/tools/upload.py", line 65, in esptool.main(cmdline) File "C:/Users/mauru/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/esptool\esptool.py", line 2890, in main esp.connect(args.before) File "C:/Users/mauru/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/esptool\esptool.py", line 483, in connect raise FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error)) esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header Ungültige Bibliothek C:\Users\mauru\Documents\Arduino\libraries\hardware in keine Header-Dateien (.h) in C:\Users\mauru\Documents\Arduino\libraries\hardware gefunden gefunden
I already tried reinstalling the versions.