# Installing `esptool`

    $ git clone https://github.com/themadinventor/esptool.git
    $ cd esptool
    $ python setup.py install -local

# NodeMCU Uploader

This tool uploads the Lua files. Requires that the device is runnig the Lua firmware.

    $ git clone https://github.com/kmpm/nodemcu-uploader.git
    $ cd nodemcu-uploader

https://github.com/nodemcu/nodemcu-firmware

# Talking to the Lua firmware

On unix Screen is a useful tool to talk to serial ports. Usage: 

    $ screen <device> <baud rate>
    
    $ screen /dev/ttyUSB0 9600

After starting screen and pressing reset you should get some output similar to this:

    <��������������x�

    NodeMCU 0.9.6 build 20150704  powered by Lua 5.1.4
    lua: cannot open init.lua
    > 

The first garbage output is expected and is from the bootloader trying to autodetect the baud rate.

# First Code

Open screen and paste this code:

    -- Get the current IP
    ip = wifi.sta.getip()
    -- This should print nil
    print(ip)

    -- Configure the device
    wifi.setmode(wifi.STATION)    
    wifi.sta.config("...", "...")

    -- Now check that the IP is assigned. It might take some time so try again.
    ip = wifi.sta.getip()
    print(ip)

# References

 * [Lua API](https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en)