Cooling side is the side printed with SP1848-27145, another side is the heat absorption side.
hiletgo
HiLetgo ESP-WROOM-32 ESP32 ESP-32D Development Board 2.4GHz Dual-Mode WiFi Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA for Arduino IDE
Ultra-Low power consumption, works perfectly with the Arduino IDE
HiLetgo ESP-WROOM-32 ESP32 ESP-32D Development Board 2.4GHz Dual-Mode WiFi Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA for Arduino IDE
Ultra-Low power consumption, works perfectly with the Arduino IDE
