Description: This controller is not only easy to program using the CP2102 USB interface, but it is also unnecessary to press the flash and reset buttons before each flash operation. ESP8266 has powerful built-in processing and storage capabilities and can be integrated with sensors and other application-specific devices via its GPIOs. NodeMCU is an open-source Lua-based firmware for ESP8266, wireless modules at extremely low cost, development boards for rapid prototyping, integrated with the ESP8266 chip. Modern internet development tools can use the built-in API to immediately realize your idea. It is compatible with IDE, works great with the latest IoT/Micropython. Parameters: 1. Supports wireless 802.11b/g standard 2. Supports three working modes: STA/AP/STA+AP 3. Built-in TCP/IP protocol stack, supports multiple TCP client connections (5MAX) 4. D0~D8, SD1~SD3: used as GPIO, PWM, I2C, etc., port drive capability 15mA 5. AD0: 1-channel ADC 6. Power input: 4.5V~7V, supports USB power supply 7. Working current: continuous transmission: approximately equal to 70mA (200mA MAX), standby Less than 200uA 8. Transmission rate: 110-460800bps 9. Supports UART/GPIO data communication interface ESP8266 CP2102 ESP-12E WIFI Serial Wireless Module Built-in USB, with flash and reset buttons, easy to program Compatible, works great with the latest IDE/ IoT/Micropython Color: As Shown Material: plastic Package Contents: 2 x Development Boards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.