firmware/variants/esp32/tbeam/variant.h

// #define BUTTON_NEED_PULLUP // if set we need to turn on the internal CPU pullup during sleep

#define I2C_SDA 21
#define I2C_SCL 22

#define BUTTON_PIN 38 // The middle button GPIO on the T-Beam
#define BUTTON_ACTIVE_LOW true
#define BUTTON_ACTIVE_PULLUP true
#define EXT_NOTIFY_OUT 13 // Default pin to use for Ext Notify Module.

#define LED_STATE_ON 0 // State when LED is lit
#define LED_PIN 4      // Newer tbeams (1.1) have an extra led on GPIO4

// TTGO uses a common pinout for their SX1262 vs RF95 modules - both can be enabled and we will probe at runtime for RF95 and if
// not found then probe for SX1262
#define USE_RF95 // RFM95/SX127x
#define USE_SX1262
#define USE_SX1268

#define LORA_DIO0 26 // a No connect on the SX1262 module
#define LORA_RESET 23
#define LORA_DIO1 33 // SX1262 IRQ
#define LORA_DIO2 32 // SX1262 BUSY
#define LORA_DIO3    // Not connected on PCB, but internally on the TTGO SX1262, if DIO3 is high the TXCO is enabled

#ifdef USE_SX1262
#define SX126X_CS LORA_CS // FIXME - we really should define LORA_CS instead
#define SX126X_DIO1 LORA_DIO1
#define SX126X_BUSY LORA_DIO2
#define SX126X_RESET LORA_RESET
// Not really an E22 but TTGO seems to be trying to clone that
#define SX126X_DIO2_AS_RF_SWITCH
#define SX126X_DIO3_TCXO_VOLTAGE 1.8
// Internally the TTGO module hooks the SX1262-DIO2 in to control the TX/RX switch (which is the default for the sx1262interface
// code)
#endif

// Leave undefined to disable our PMU IRQ handler.  DO NOT ENABLE THIS because the pmuirq can cause sperious interrupts
// and waking from light sleep
// #define PMU_IRQ 35
#define HAS_AXP192
#define GPS_UBLOX
#define GPS_RX_PIN 34
#define GPS_TX_PIN 12
// #define GPS_DEBUG

// Used when the display shield is chosen
#ifdef USE_ST7796

#undef EXT_NOTIFY_OUT
#undef LED_STATE_ON
#undef LED_PIN

#define HAS_CST226SE 1
#define HAS_TOUCHSCREEN 1
// #define TOUCH_IRQ 35 // broken in this version of the lib 0.3.1
#ifndef TOUCH_IRQ
#define TOUCH_IRQ -1
#endif
#define CANNED_MESSAGE_MODULE_ENABLE 1
#define USE_VIRTUAL_KEYBOARD 1

#define ST7796_NSS 25
#define ST7796_RS 13  // DC
#define ST7796_SDA 14 // MOSI
#define ST7796_SCK 15
#define ST7796_RESET 2
#define ST7796_MISO -1
#define ST7796_BUSY -1
#define VTFT_LEDA 4
#define TFT_SPI_FREQUENCY 60000000
#define TFT_HEIGHT 222
#define TFT_WIDTH 480
#define BRIGHTNESS_DEFAULT 100        // Medium Low Brightness
#define SCREEN_TRANSITION_FRAMERATE 5 // fps
#endif