ESP32-PaxCounter/src/hal/lopy4.h

// Hardware related definitions for Pycom LoPy Board (not: LoPy4)

#define LOPY
#define CFG_sx1276_radio 1

// Hardware pin definitions for Pycom LoPy4 board
#define PIN_SPI_SS    18
#define PIN_SPI_MOSI  27
#define PIN_SPI_MISO  19
#define PIN_SPI_SCK   5
#define RST   LMIC_UNUSED_PIN
#define DIO0  23 // LoRa IRQ
#define DIO1  23 // workaround
#define DIO2  23 // workaround 

// select WIFI antenna (internal = onboard / external = u.fl socket)
#define PIN_ANTENNA_SWITCH  21
#define WIFI_LOPY_ANTENNA ANTENNA_TYPE_INTERNAL

typedef enum {
    ANTENNA_TYPE_INTERNAL = 0,
    ANTENNA_TYPE_EXTERNAL
} antenna_type_t;

extern void antenna_init (void);
extern void antenna_select (antenna_type_t antenna_type);