Opencircuit NodeMcu v2 Lua ESP-12E WIFI Development Board

The NodeMcu is an open source card with an integrated WIFI ESP-12E module. It is not a weak like the Arduino, with 512 KB of memory and a processor at 40Mhz there is no shortage of sources. This sign is extremely suitable for starting IoT (Internet of Things) applications. The programming of NodeMcu is slightly different from normal, with the API which resembles NodeJS, this module receives commands via the LUA scripts being downloaded.

This concerns version 2 of the NodeMCU series, thinner than the previous version and therefore better suited to a breadboard. Now there is a row on both sides of the board when you place it in the middle of a bread board. This saves a lot by connecting I / O.

Integrated 2102 series chip drivers can be found here https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx

characteristics 802.11 b / g / n wireless standard STA / AP / STA + AP support Standard on 9600 baud

Integrated TCP / IP protocol stack to support multiple TCP client connections (5 MAX) D0 ~ D8, SD1 ~ SD3: used as GPIO, PWM, IIC, etc., port driver capacity 15mA AD0: 1 ADC channel Power input: 4.5 V ~ 9 V (10 VMAX), powered by USB Current: continuous transmission: ≈70mA (200mA MAX), standby: <200uA Transfer rate: 110-460800bps Support for UART / GPIO data communication interface Remote firmware upgrade (OTA) Support for Smart Link Smart Grid