After some searching I came to the conclusion that the package on github is outdated. Merging the new files according to the post mentioned above into the IDE broke something. Even the blink example would create the compile error. I settled on https://github.com/sandeepmistry/esp8266-Arduino which had a more recent release package. With that the code does compile.
After some searching I came to the conclusion that the package on github is outdated. Merging the new files according to the post mentioned above into the IDE broke something. Even the blink example would create the compile error. I settled on https://github.com/sandeepmistry/esp8266-Arduino which had a more recent release package. With that the code does compile.