ESP8266-01刷写AT固件和NodeMCU固件：
实物图：
引脚定义：
EN上拉
IO0下拉
IO2空接
Boot阶段:Baudrate:74880
刷写固件工具：flash_download_tools_v2.4_150924
AT固件:
Ai-Thinker_ESP8266_DOUT_8Mbit_v1.5.4.1-a_20171130.bin
SPI SPEED:40MHz
SPI MODE:DOUT
FLASH SIZE:8Mbit
Baudrate:115200
AT version:1.2.0.0(Jul 1 2016 20:04:45)
SDK version:1.5.4.1(39cb9a32)
Ai-Thinker Technology Co. Ltd.
v1.5.4.1-a Nov 30 2017 15:54:29
NodeMCU固件:
nodemcu_float_0.9.6-dev_20150704.bin
nodemcu_integer_0.9.6-dev_20150704.bin
SPI SPEED:40MHz
SPI MODE:DOUT
FLASH SIZE:8Mbit
Baudrate:9600
NodeMCU 0.9.6 build 20150704 powered by Lua 5.1.4