How much you get depends on the version you get. The memory is external and some come with 512kB, some come with 4096kB.<p>cf <a href="https:&#x2F;&#x2F;gist.github.com&#x2F;Coaxial&#x2F;268c4198d09c2a712387" rel="nofollow">https:&#x2F;&#x2F;gist.github.com&#x2F;Coaxial&#x2F;268c4198d09c2a712387</a> for flash and RAM for mos (all?) currently available ESP8266 versions