yesterday I bought the ESP8266 12E node mcu board and to be honest I don't want to use a new language like Lua or Arduino ide so I'm tryng to download the latest espressif firmware into the ESP.
I was able to compile the SDK, my configuration is non-os SDK and non-FOTA, but I found a bin file called master_device_key.bin, It seems to be connected with cloud updating. Is It needed? how can I don't download into the flash memory without problems? And also I have a nodemcu board, can I download the espressif firmware into it or I'm going to have issues with the circuit board?