arduino-esp32/variants/esp32-evb/pins_arduino.h

#ifndef Pins_Arduino_h
#define Pins_Arduino_h

#include <stdint.h>

#define EXTERNAL_NUM_INTERRUPTS 16
#define NUM_DIGITAL_PINS        40
#define NUM_ANALOG_INPUTS       16

#define analogInputToDigitalPin(p)  (((p)<20)?(esp32_adc2gpio[(p)]):-1)
#define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
#define digitalPinHasPWM(p)         (p < 34)


static const uint8_t KEY_BUILTIN = 34;

static const uint8_t TX = 1;
static const uint8_t RX = 3;

#define TX1 4
#define RX1 36

static const uint8_t SDA = 13;
static const uint8_t SCL = 16;

static const uint8_t SS    = 17;
static const uint8_t MOSI  = 2;
static const uint8_t MISO  = 15;
static const uint8_t SCK   = 14;

#define BOARD_HAS_1BIT_SDMMC
#define BOARD_MAX_SDMMC_FREQ SDMMC_FREQ_DEFAULT

#endif /* Pins_Arduino_h */