ACROBOTIC ESP8266 ESP-12E Development Board IOT Arduino NodeMCU ESP8266 ESP-12E Serial to Wi-Fi module ready for Arduino, NodeMCU, AT+Commands Built-in USB to Serial UART adapter (Silicon Labs CP2102) with Micro-USB connector Reset button, user-programmable button, user-controllable LED Two diode-protected power inputs (one for a USB cable, another for a battery) Onboard GPIO, PWM, ADC, I2C and 1-Wire available