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The NodeMCU V3 is a powerful and versatile IoT development platform built around the popular ESP8266 WiFi SoC. It integrates wireless networking, a USB-to-serial interface and expanded flash memory for IoT applications, with the CH340G chip handling USB-to-serial conversion for easy programming over the onboard Micro USB port.
It supports 2.4 GHz IEEE 802.11 b/g/n WiFi connectivity and is compatible with the Arduino IDE, Lua and MicroPython, so you are not locked into one development environment.
Flash memory is listed as 32 Mbit, which is 4 MB, larger than the 1 MB or so found on some earlier NodeMCU boards, giving more room for larger applications. The board exposes GPIO, PWM, ADC, UART, SPI and I2C interfaces, is described as low-power for battery-powered IoT devices and has a breadboard-friendly pin layout.
Flash a simple blink or UART example first to confirm the board, toolchain and debugger all talk to each other, before moving on to your own peripherals. Keep the SWD or USB connection short and shielded if you see intermittent flashing failures.
Makers and students building WiFi-connected projects who want a well-documented, widely supported ESP8266 board with generous flash for bigger sketches.
The larger flash on this board is useful once your sketch grows beyond simple examples, for instance when you add a web server, over-the-air updates or a filesystem for configuration data. Select the matching flash size in your board manager settings so uploads use the full available space.
The ESP8266 WiFi SoC.
32 Mbit (4 MB).
Over USB via the onboard CH340G chip, using Arduino IDE, Lua or MicroPython.
Yes.
2.4 GHz 802.11 b/g/n.
| Brand | Espressif |
|---|---|
| Chipset | ESP8266 |
| Flash Memory | 32Mbit (4MB) |
| Selling unit | PCS |
