Waveshare ESP32-S3 4-Inch LCD Display Development Board w/ Touch

The board is fully compatible with the official Espressif ESP-IDF framework and the Arduino Core for ESP32-S3 via the Arduino IDE. For GUI development, the LVGL graphics library is highly recommended and can be integrated into either framework. You'll need to configure your development environment to target the ESP32-S3 chip and manage the external PSRAM and flash memory in your project settings. Example projects for the display and touch interface are typically provided by Waveshare.

The CAN (Controller Area Network) and RS485 transceivers are pre-wired to specific GPIO pins on the ESP32-S3. You must use the corresponding UART and CAN controller drivers within ESP-IDF or Arduino. For RS485, you'll need to control the RE/DE direction pin via GPIO. For CAN, ensure you terminate the bus with a 120-ohm resistor if it's at the end of the line. Refer to the board's pinout diagram to identify the correct TX, RX, and control pins for your application's wiring.

The board is typically powered via its USB-C port at 5V DC. The total current draw depends heavily on the display brightness, CPU load, and active wireless radios. With the display at moderate brightness and Wi-Fi active, expect several hundred milliamps. For low-power scenarios, utilize the ESP32-S3's deep sleep modes and the board's independent power controls to shut down peripherals like the display and RS485 transceivers, significantly reducing idle current.