ESP-12f Module
On the ESP-12F, in addition to the ESP-12E some more pins are available on the “bottom” side that are th signals to the FLASH memory. They are not of much use in most scenarios but in the case you want to add some SPI RAM.
On the ESP-12F, in addition to the ESP-12E some more pins are available on the “bottom” side that are th signals to the FLASH memory. They are not of much use in most scenarios but in the case you want to add some SPI RAM.