NodeMcu Lua WIFI Development Board V3.0 ESP8266 Serial Port Baseboard

PWR indicator
5V USB power supply input interface
6.5-16V DC power input port
Extended I2C interface (two groups)
Development board IO extension interface (GVS interface)
development board installation interface (ESP32-30 Pin)
5V/3.3V output interface
Jumper interface [select V, voltage 5V or 3.3V]