Waveshare ESP32-S3 1.85-Inch Round LCD Development Board

The board is fully compatible with Espressif's official ESP-IDF framework and the Arduino Core for ESP32-S3 via the Arduino IDE. For graphical interfaces, you can use LVGL library, which is well-supported on the QSPI display. Setup involves installing the correct board package and selecting the 'ESP32S3 Dev Module' in your development environment, then configuring the display driver pins as per Waveshare's example code.

Connect a 3.7V Li-ion or Li-Po battery to the dedicated battery connector pins on the board. The integrated power management IC handles charging; the typical charging current is configured via a resistor on the board (often ~500mA). The board can operate from USB power while simultaneously charging the battery. Always refer to the board's schematic for the exact pinout and recommended battery specifications to avoid damaging the circuitry.

Yes, the onboard audio decoder, microphone input, and speaker driver output make it suitable for audio applications. You can capture audio via the MEMS microphone, process it using the ESP32-S3's I2S and ADC peripherals, and play it back through the connected 8-ohm speaker. Development involves using the ESP-ADF (Audio Development Framework) or writing direct I2S code in ESP-IDF to manage the audio codec chip and GPIO mappings for the audio subsystem.

First, install the LVGL library via PlatformIO or Arduino Library Manager. Initialize the display driver by configuring the QSPI bus and the specific LCD controller (e.g., GC9A01) using the provided Waveshare example as a base. You must set the display buffer size in PSRAM for smooth rendering. Then, create LVGL objects like labels or buttons within your application's task loop. The round display requires defining a mask or using LVGL's built-in circular object support for proper visual output.