This replaces the .bin file provided in the Firmware flashing folder, as referenced in this article, and this video. If you just want a working firmware, either use the nodemcu-master-9-modules-2016-07-21-20-12-04-integer.bin file provided by Quindor, or the nodemcu-master-6-modules-2018-05-18-18-09-02-integer.bin file provided here.
If you want to compile your own firmware, to have a more recent version, or to add different modules for your own use, I'd suggest using NodeMCU Build (nodemcu-build.com). This does require an active email address, but in my experience, they only send you an email to inform you that your build has started or completed.
If you do decide to compile your own firmware, make sure to include at least the crypto, file, net, pwm, sjson, tmr and wifi modules. I'm not 100% sure the crypto and sjson modules are actually required, this still requires some testing, but for now I'd advise to include them.
Notes:
- None of theMiscellaneous options need to be checked
- After clicking the 'Start your build' button, it can take some time before you get an email saying your build has started. Please be patient.