After flashing the nodemcu firmware
you can upload your own LUA script code on your device. To do this there are several tools
In this article we’ll treat ESPlorer
It ‘a java application available for Windows, Linux and OSX. As a prerequisite requires the presence of Java SE ver. 7 or higher.
Download the tool from the link listed below to a folder
To run it excecute from command prompt
java -jar "ESPlorer.jar"
or we can use a script in dos or unix (ESPlorer.bat or ESPlorer.sh).
At this point we plug the Nodemcu devkit to the PC and set the communication parameters and the speed of the COM port.
In Windows we have the following screen
You can press Open, which allows access to the device.
You can proceed at this point to the creation of your own code in LUA script and upload it on the ESP8266; you can use the various modules available in the firmware according to the documentation
In the next article we’ll describe how to compile your personalized firmware in Linux