ESP32-PaxCounter/src/hal/lopy4.h

// Hardware related definitions for Pycom LoPy4 Board

#define HAS_LORA 1       // comment out if device shall not send data via LoRa
#define HAS_SPI 1        // comment out if device shall not send data via SPI
#define CFG_sx1276_radio 1
//#define HAS_LED NOT_A_PIN // LoPy4 has no on board mono LED, we use on board RGB LED
#define HAS_RGB_LED   GPIO_NUM_0  // WS2812B RGB LED on GPIO0 (P2)
#define BOARD_HAS_PSRAM // use extra 4MB extern RAM

// Hardware pin definitions for Pycom LoPy4 board
#define PIN_SPI_SS    GPIO_NUM_18
#define PIN_SPI_MOSI  GPIO_NUM_27
#define PIN_SPI_MISO  GPIO_NUM_19
#define PIN_SPI_SCK   GPIO_NUM_5
#define RST   LMIC_UNUSED_PIN
#define DIO0  GPIO_NUM_23 // LoRa IRQ
#define DIO1  GPIO_NUM_23 // Pin tied via diode to DIO0
#define DIO2  GPIO_NUM_23 // Pin tied via diode to DIO0

// select WIFI antenna (internal = onboard / external = u.fl socket)
#define HAS_ANTENNA_SWITCH  GPIO_NUM_21 // pin for switching wifi antenna (P12)
#define WIFI_ANTENNA 0    // 0 = internal, 1 = external

// uncomment this only if your LoPy runs on a PYTRACK BOARD
//#define HAS_GPS 1
//#define GPS_I2C GPIO_NUM_25, GPIO_NUM_26 // SDA (P22), SCL (P21)
//#define GPS_ADDR 0x10

// uncomment this only if your LoPy runs on a EXPANSION BOARD
#define HAS_LED GPIO_NUM_12 // use if LoPy is on Expansion Board, this has a user LED
#define LED_ACTIVE_LOW 1 // use if LoPy is on Expansion Board, this has a user LED
#define HAS_BUTTON GPIO_NUM_13 // user button on expansion board
#define BUTTON_PULLUP 1  // Button need pullup instead of default pulldown
#define HAS_BATTERY_PROBE ADC1_GPIO39_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
#define BATT_FACTOR 2 // voltage divider 1MOhm/1MOhm -> expansion board 3.0
//#define BATT_FACTOR 4 // voltage divider 115kOhm/56kOhm -> expansion board 2.0