esp-open-sdk builds without problems on Raspian's flavour of Debian/Wheezy for the PI2. (And on the Cubietruck's “Cubian” flavour of Debian/Wheezy too, but that may be an information for a different wiki page?) (Due to the lack of a “PI1” I cannot thest it there…)
I still use USB and telnet (netcat) to access my 8266ers so I can't tell about 8266ers and the PI's GPIOs. — yeti 2015/06/20 09:11