ESP32 ESP-32S NodeMCU-32S ESP-WROOM-32 Development Board 2.4 GHz Wifi and Bluetooth Dual Cores Microcontroller ESP-WROOM-32 Chip for Arduino NodeMCU, 1 Pcs ESP32 integrates antenna switches, RF balun, power amplifiers, low noise amplifiers, filters, and power management modules. The entire solution occupies the smallest printed circuit board area. The 2.4 GHz Wi-Fi plus Bluetooth dual-mode chip adopts low-power 40nm technology, which has the best power consumption performance and radio frequency performance, safe and reliable, and easy to expand to various applications. Related resources link: CP2102 Driver: silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers Warm Tips: When you download the program to the development board, you need to press the IOO button for 1-2 seconds. For ESP32: espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf For NodeMCU: github.com/Nicholas3388/LuaNode github.com/nodemcu/nodemcu-firmware/tree/dev-esp32 Package included: 1/2/3 × ESP32 ESP-32S ESP-WROOM-32 Development Board