Foogod wrote:I'm kinda surprised nobody has pointed this out thus far, but those extra pins on the 12E are not just for SDIO. They're apparently all GPIO pins as well (by the look of things, GPIO6 - GPIO11). This means that while the ESP-12 only has 11 GPIOs, the ESP-12E actually brings out the full 17 GPIOs supported by the ESP8266EX chip! For some applications, this seems extremely worthwhile to me.
Well, don't get too excited about extra GPIO pins. Like all other, these too serve dual or triple purpose and are unusable, since onboard flash chip uses them. I read somewhere, that there is a way to free up two pins though - by running flash chip in DIO mode.