HS6566 ESP32-C3 OLED development board with 0.42 inch OLED module ceramic antenna ESP32 supermini development board wifi Bluetooth This is esp32c3 chip with 1 CPU core(s), WiFi/BLE, silicon revision v0.3, 4MB external flash https://electronics.stackexchange.com/questions/725871/how-to-use-onboard-0-42-inch-oled-for-esp32-c3-oled-development-board-with-micro https://www.hellasdigital.gr/electronics/microcontrollers/esp32-c3-oled-development-board-with-0-42-inch-oled-module-ceramic-antenna-esp32-supermini-development-board-wifi-bluetooth/