Waveshare ESP32-S3 1.85-Inch Round Display Development Board

You can program the board using the Arduino IDE with the ESP32-S3 board package installed, or directly with Espressif's ESP-IDF framework. Connect via the onboard USB-C port, select the correct COM port, and choose 'ESP32-S3' as the target. For display graphics, use the TFT_eSPI or LovyanGFX library, configuring the display driver pins as per Waveshare's example code. The board is also compatible with MicroPython for rapid scripting.

Operating current varies with usage: active mode with display and Wi-Fi can draw 150-250mA, while deep sleep mode reduces consumption to microamps, significantly extending battery life. Using the integrated battery management circuit, you can connect a Li-Po cell. Implement deep sleep cycles in your firmware via ESP-IDF's power management APIs to achieve days or weeks of operation on a single charge, depending on sensor wake-up intervals.

The board is available in a variant with capacitive touch. If your unit has touch, the touch controller is connected via I2C or a dedicated GPIO bus. In ESP-IDF or Arduino, you'll need to initialize the touch driver (e.g., FT5x06 or GT911) using the provided library or example code from Waveshare. Calibrate the touch points for the circular screen area, and handle touch events in your UI loop to enable interactive controls like buttons and sliders.