For bosses to help see what the problem is Have you tried various ways to download is failed, spi mode all tried it again, also tried to use flash size, baud rate also tried
CodePudding user response:
Gpio0 gpio2 to conform to the requirements of the level of programming
CodePudding user response:
Burn it to try it, first, an official AT the firmware to see the AT command can be used, the arduino that see esp8266 didn't choose the right development board