ESP8266 Community Forum

Using the Arduino board with removing the chip to flash it is brilliant.

So, I want to know why to flash esp modules?

One told me about nodemcu devkit, that it's already having lua firmware, and I don't have to flash it.

Does that means esp modules don't have any firmware from the manufacturer?
What flashing options, are there other possible firmware for esp modules?

Regards,

You can flash them with node mcu lua. From the arduino ide with arduino code compiled for the esp. Ther are some other firmware avaiable as well. I have a project making a basic i terperter for the esp8266 http://esp8266basic.com

There are lots of options.