LilyGO T-ETH Lite ESP32-S3R8 Wi-Fi & BLE 5.0 Development Board

The board is fully compatible with the Arduino IDE using the ESP32-S3 Arduino core, Espressif's official ESP-IDF framework for native development, and PlatformIO within VS Code. You must install the correct board definitions and USB drivers. Initial setup involves selecting 'LilyGO T-ETH Lite' or 'ESP32-S3 Dev Module' as the target, configuring the flash size to 16MB, and PSRAM to 'OPI PSRAM' in the tools menu before uploading your sketch or project.

The primary and recommended power source is the onboard USB-C port, which accepts a standard 5V supply. The board's internal regulators step this down to the required core voltages. The operating current varies significantly based on Wi-Fi/BLE radio activity and CPU load; expect an average of 100-250mA during active transmission. For low-power battery-operated scenarios, you can supply 5V directly to the VIN pin, but ensure the power source can handle current spikes during RF transmission.

The 8MB of external PSRAM (Pseudo Static RAM) provides additional volatile memory for data-intensive operations where the internal SRAM is insufficient. It is extremely useful for buffering images from camera modules, storing large data sets for sensor logging, handling complex graphics buffers for displays, or managing extensive web server content. In ESP-IDF, you can allocate memory from the PSRAM pool using specific functions, while in Arduino, it can be enabled for the 'malloc' heap to automatically use it for dynamic allocations.