The simplest way to install the mqTrains firmware is to download the firmware binary file(s) from the links below and use the nodemcu-flasher program (Windows) to upload to your ESP device. Uploading from a MacOS, Linux or a Raspberry Pi is a little more complicated but described in the reference mentioned below.

(The Open Source code will be available shortly)

Firmware and Getting Started user guides are available here:

The recommended program to upload firmware in Windows is available here:

Additional references available: