Ai Thinker NodeMCU-ESP8266 is an open-source firmware and development kit that helps you to prototype or build IoT products. It includes firmware that runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which is based on the ESP-12 module. The firmware uses the Lua scripting language. It is based on the eLua project and built on the Espressif Non-OS SDK for ESP8266. Features: WIFI module: ESP-12E Processor: ESP8266 CP2102 Chip Built-in Flash: 32Mbit Antenna: Onboard PCB antenna Peripheral interface: UART/SPI/I2C/SDIO/GPIO/ADC/PWM WiFi protocol: IEEE 802.11 b/g/n Frequency range: 2.4G ~ 2.5G (2400M ~ 2483.5M) WIFI mode: Station / SoftAP / SoftAP Station Power supply: 5V Logic level: 3.3V   Package includes: 1 x Ai Thinker NodeMCU-ESP8266 Development Board SKU: PGI-00648411 Category: AI Thinker Esp Wifi Modules