Troubleshooting Upload using luatool when you hit an TransportError

This blog is to show how to resolve an error during uploading code you have written for the NodeMCU device from the Mac and in my case Mac OS Yosemite 10.10.5

The error that showed up when I tried to upload from my laptop:


( Just so that you know : this is where I downloaded the luatool ).

http://www.cnx-software.com/2015/10/29/getting-started-with-nodemcu-board-powered-by-esp8266-wisoc/



The error shown in blog means there is another communication program (in my case it is Cool Term ) running on my laptop, which was used to send commands to the NodeMCU firmware.

So I did "disconnect" this to device on the CoolTerm, and was able to run the upload the lua script from my Mac to device successfully.