First light

// First light: bring a Lonely Binary SPI TFT panel up and run its self-test.
//
// Wiring, using the ribbon: one 15-way FPC cable from the panel's socket to
// the socket on your expansion board. Contacts down — the board prints
// PINS FACE DOWN beside the connector. Nothing else to connect.
//
// Wiring, using the header instead (8 wires, ESP32-S3 defaults shown):
//   display 3V3  -> ESP32-S3 3V3       (3.3 V only, never 5V)
//   display GND  -> ESP32-S3 GND
//   display SCL  -> ESP32-S3 GPIO12    (SPI clock; the pad says SCL)
//   display MOSI -> ESP32-S3 GPIO11
//   display DC   -> ESP32-S3 GPIO2
//   display RST  -> ESP32-S3 GPIO42
//   display CS   -> ESP32-S3 GPIO10
//   display BL   -> ESP32-S3 GPIO41    (or to 3V3 to leave it lit)
//
// On a classic ESP32 the same eight wires go to GPIO 18, 23, 2, 4, 15 and
// 32 instead, and the library picks that set for you from the board you
// choose below. You do not edit anything.
//
// Arduino IDE: Tools > Board > esp32 > "ESP32S3 Dev Module" for an
// ESP32-S3, or "ESP32 Dev Module" for a classic ESP32. Tools > Port, pick
// the port. On an S3, Tools > USB CDC On Boot > Enabled so Serial reaches
// the monitor. Library: "Lonely Binary Display" from Tools > Manage
// Libraries, which pulls in "GFX Library for Arduino" with it.

#include <LonelyBinaryDisplay.h>

// The only line that changes between the six panels in the kit:
//   LB_TFT_096  LB_TFT_18  LB_TFT_20  LB_TFT_24  LB_TFT_28  LB_TFT_35
LB_Display display(LB_TFT_24);

void setup() {
  Serial.begin(115200);
  delay(500);

  if (!display.begin()) {
    Serial.println("Display did not start.");
    Serial.println("Check the ribbon is contacts-down, then check DC and RST.");
    return;
  }

  // Pins actually in use, panel identity, colour order, backlight polarity.
  display.printInfo();

  // Solid colours, a backlight sweep, and a labelled colour-bar page.
  display.selfTest();

  // Anything after this is yours. The drawing surface is Arduino_GFX.
  auto *gfx = display.gfx();
  gfx->fillScreen(BLACK);
  gfx->setTextColor(WHITE);
  gfx->setTextSize(2);
  gfx->setCursor(10, 10);
  gfx->print("Hello");
}

void loop() {
  delay(1000);
}