To install BPL onto a NodeMcu or D1 mini, you can use a flasher or PlatformIO.

Using flasher is easy.

1. Download desired binary from Github

https://github.com/vitotai/BrewPiLess/tree/master/bins

1. Download the flasher and use to to upload the binary. https://github.com/nodemcu/nodemcu-flasher

Using platformIO is recommended. It will enable you to change the configuration when necessary.

1. Download and install VSCode: https://code.visualstudio.com

2. Follow the instruction to install PlatformIO http://platformio.org/get-started/ide?install=vscode

3. Download BrewPiLess GitHub repository.

4. Launch VSCode, open the path of BrewPiLess that contains platformio.ini

5. If everything goes well, you can build and upload. Check PlatformIO manual for more detail.