NodeMCU has ESP-12 based serial WiFi integrated on board to provide GPIO, PWM, ADC, I2C and 1-WIRE resources at your fingertips, built-in USB-TTL serial with super reliable industrial strength for superior stability on all supported platforms. This module is one of the cheapest available wifi-modules in the market. V3 or Version3 is the latest version of this module.

Features:
Wi-Fi Module ESP-12E module similar to ESP-12 module but with 6 extra GPIOs.
Headers -2x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins
Power your development in the fastest way combination with NodeMCU Firmware!
Wireless 802.11 b / g / n standard
Micro USB port for power, programming and debugging
Built-in TCP/IP protocol stack to support multiple TCP Client connections (5 MAX)
Support UART / GPIO data communication interface
Remote firmware upgrade (OTA)
Support Smart Link Smart Networking
ESP8266 has IO Pin
Don’t need to download resetting
A great set of tools to develop ESP8266
Lowest cost WI-FI
FOR Arduino like hardware IO
Greatly speed up your IOT application developing process
Open-source, Interactive, Programmable, Low cost, Simple, Smart, WI-FI enabled

Weight 10 g
Dimensions 4 × 2 × 1 cm
Version Type

CP2102 Chip, CH340 Chip

Output Power(dBm)

19.5 @802.11b Mode

Flash Memory(Mb)

4

Support

SDIO 1.1/2.0, SPI, UART

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