这是练英语写作的，中文在下面。

1、Simple Demo

We can operate the GPIO of NodeMCU like Arduino,Code block-1 is a simple demo gave by the official website.

For more you can see http://nodemcu.readthedocs.io/en/master/en/modules/gpio/

pin = 1–Define the number of GPIO which to operate

gpio.mode(pin,gpio.OUTPUT)–Define the mode of GPIO to output

gpio.write(pin,gpio.HIGH)–Output a high level

gpio.mode(pin,gpio.INPUT)–Define the mode of GPIO to input

print(gpio.read(pin))–Read the input signal,return a number, 0 = low, 1 = high

The syntax of  GPIO mode definition is as follows:

gpio.mode(pin,mode[,pullup])

Parameters

• pin pin
  to configure, IO index
• mode one
  of gpio.OUTPUT, gpio.OPENDRAIN, gpio.INPUT, or gpio.INT (interrupt mode)
• pullup gpio.PULLUP
  enables the weak pull-up resistor; default is gpio.FLOAT

2、Pin Map

The Figure-1 (NODEMCU_DEVKIT_V1.0_PINMAP.png) is the GPIO map between NodeMCU and ESP8266.

3、GPIO Index

The Table-1 is the map
between  pin index and ESP8266 GPIO. Combined with Figure-1
and Table-1,we can get the pin-index corresponding the hardware GPIO.

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上面是练英语写作的，欢迎吐槽。中文如下：

1、简单例程

我们可以像Arduino一样只需要几行代码就能方便地操作NodeMCU的GPIO。下面是官方的示例代码，更多请查看

http://nodemcu.readthedocs.io/en/master/en/modules/gpio/

示例代码code block-1 

参考http://nodemcu.com/index_cn.html

pin = 1
gpio.mode(pin,gpio.OUTPUT)
gpio.write(pin,gpio.HIGH)
gpio.mode(pin,gpio.INPUT)
print(gpio.read(pin))

pin = 1–定义IO口序号

gpio.mode(pin,gpio.OUTPUT)–输出模式

gpio.write(pin,gpio.HIGH)–输出高电平

gpio.mode(pin,gpio.INPUT)–输入模式

print(gpio.read(pin))–读取输入信号,返回0或1

GPIO模式定义语法如下：

gpio.mode(pin,mode[,pullup])

参数

• pin IO
  口序号
• mode 可以是gpio.OUTPUT,
  gpio.OPENDRAIN, gpio.INPUT, 或者 gpio.INT (中断模式)
• pullup 支持gpio.PULLUP上拉模式；默认为
  gpio.FLOAT浮空模式

2、引脚映射

NodeMCU与ESP8266端口对应关系Figure-1

3、GPIO序号

GPIO序号与ESP8266引脚对应关系Table-1

结合Figure-1与Table-1，我们就能得到NodeMCU硬件引脚对应的IO序号。

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