求助：ESP01S烧写错误
求助 ：在通过USB烧写器对ESP01S注入程序时报错：
Executable segment sizes:
ICACHE : 32768 - flash instruction cache
IROM : 499828 - code in flash (default or ICACHE_FLASH_ATTR)
IRAM : 28881 / 32768 - code in IRAM (IRAM_ATTR, ISRs...)
DATA : 1740) - initialized variables (global, static) in RAM/HEAP
RODATA : 3864) / 81920 - constants (global, static) in RAM/HEAP
BSS : 30912 ) - zeroed variables (global, static) in RAM/HEAP
项目使用了 534313 字节，占用了 (55%) 程序存储空间。最大为 958448 字节。
全局变量使用了36516字节，(44%)的动态内存，余留45404字节局部变量。最大为81920字节。
esptool.py v3.0
Serial port COM3
Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last):
File "C:\Users\�����\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2/tools/upload.py", line 66, in <module>
esptool.main(cmdline)
File "C:/Users/�����/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptool\esptool.py", line 3552, in main
esp.connect(args.before, args.connect_attempts)
File "C:/Users/�����/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptool\esptool.py", line 529, 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
请各位大神帮忙解答一下如何处理，谢谢 不是专用下载器的话，4条TTL线连接好以后 --- 还要注意 GPIO0 ：
下载模式 外部拉低
运行模式 悬空或者外部拉高
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