It's a simple demonstation of LED blink in ESP32-C3. and There are three different ways to implement periodic LED blinking from LEDC, gptimer, esp-timer. As there is no usb-uart bridge circuit in this tiny gateway board, it uses the builtin native USB from ESP32-C3 (GPIO18: D-) (GPIO19: D+). thus it uses usb-serial-jtag...

Standalone ESP-IDF SLCAN/LAWICEL bridge for ESP32-S3 using USB Serial/JTAG and classical CAN (TWAI)