4.3-inch CYD: 480 × 272 / 800 × 480

Select the 4.3-inch resolution

The product listing combines 480 × 272 and 800 × 480 options. For the Sunton reference family, the rear model distinguishes these panels; confirm it before choosing an example.

The Sunton S043 definitions referenced here target ESP32-S3 RGB boards. If your module actually says ESP32-WROOM-32, request that revision’s schematic and example rather than selecting an S3 target from the listing title.

Choose a board environment

N-suffix environments are available for non-touch models. The linked profile is a reference, not confirmation of a board lacking this identifier.

First power-on and USB check

Use a USB data cable. Photograph the working factory screen before replacing its firmware. Connect without extra wiring, identify the new serial port and use the USB checklist if no port appears.

A serial-only sketch checks programming independently of the display. Set the monitor to 115200 baud; it is not a screen test.

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("ESP32S: serial connection OK");
}
void loop() { delay(1000); }

Run a matching RGB demonstration

Follow the PlatformIO workflow and keep the selected board’s driver, RGB timings and memory configuration. Test the display before adding touch or a custom interface. Changing only width and height does not convert one panel profile into another.

Capacitive S043 reference pins

For the two named capacitive reference profiles these control pins match, but resolution and timing settings differ. Read the complete profile for your panel; do not replace its data-pin list with this abbreviated table.

Display and touch acceptance checklist

• Confirm that the demo fills the expected screen area and shows distinct colors.
• Test the center and all four corners. Record rotation and touch-coordinate errors separately.
• For resistive touch, run the project calibration procedure and save the results for that rotation.
• For capacitive touch, confirm controller detection, then check coordinate transforms.
• Reset once after disconnecting the serial monitor and confirm normal startup.

Troubleshoot resolution and timing

A clipped image usually requires checking the selected resolution, logical rotation and UI canvas. Flicker, repeated rows or an unstable picture require checking RGB timing and buffer settings. Compare the known-good demo and your modified project one change at a time.

Firmware upload and recovery

Prefer the project upload command, which uses its generated bootloader, partition table and application layout. For a downloaded binary, follow the release manifest rather than assuming an offset or reusing another board’s firmware.

If connection fails, lower upload speed, close other serial programs and follow the board’s BOOT/RESET procedure. After reset, read the serial log before changing display settings. See the firmware flashing guide.

Troubleshooting

Documentation sources and downloads

• 480 × 272 capacitive definition
• 800 × 480 capacitive definition
• All S043 board variants
• Display demo

References checked October 14, 2026. Board definitions document specific reference hardware; verify the revision on your board. These instructions have not been bench-tested on your individual unit.