Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin	-
Microcontroller	ESP8266EX
Flash Memory	4MB (32Mbit)
Clock Speed	80MHz / 160MHz
WiFi Standard	IEEE 802.11 b/g/n
Operating Voltage	3.3V
Input Voltage	5V via Micro USB
Digital I/O Pins	17
Analog Input Pins	1 (A0)
Programming Language	Lua, C++, Arduino IDE
Interface	Micro USB, UART, SPI, I2C

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Great connectivity range

I was surprised by how well the WiFi signal holds up even through walls. I used this to monitor temperature sensors in my garage, and the connection remains stable. Highly recommended.

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for IoT beginners

This NodeMCU board is exactly what I needed to start my smart home projects. It connects to WiFi instantly and the Lua firmware is pre-installed. Great value for the price.

Anonymous

Mar 07, 2026

Rating: 5/5

Easy setup process

As someone new to embedded systems, I found the setup incredibly straightforward. Drivers installed automatically on Windows 10, and I had my first LED blinking via WiFi in under 20 minutes.

Anonymous

Mar 05, 2026

Rating: 4/5

Solid board, minor pin labeling issue

The performance is excellent and stable. My only complaint is that some of the pin labels on the silkscreen are a bit small to read without a magnifier. Otherwise, it works flawlessly with the Arduino IDE.

Anonymous

Mar 04, 2026

Rating: 5/5

Essential for university projects

Bought five of these for our final year project. They are easy to program, cheap, and powerful enough for our data logging needs. The community support online is also huge.

Anonymous

Mar 01, 2026

Rating: 4/5

Good but gets warm

Functions perfectly for sending sensor data to the cloud. Note that it does get slightly warm during continuous WiFi transmission, but nothing concerning. Just ensure proper ventilation in your enclosure.

5 FAQ

Q: How do I flash new firmware if the current one is corrupted?

A: You can use the ESPTOOL.py command-line utility or the NodeMCU PyFlasher tool. Hold the FLASH button while pressing RESET to enter boot mode, then upload the new firmware binary.

Q: Can I power this board directly with a 9V battery?

A: No, you should not connect a 9V battery directly to the Vin or 5V pin as it may damage the voltage regulator. Please use a regulated 5V source or a USB power bank.

Q: Does this come with a USB cable included?

A: Yes, the package includes a standard Micro USB cable for both power supply and programming purposes.

Q: What is the maximum current output for the 3.3V pin?

A: The onboard regulator can typically supply up to 600mA, but it is recommended to keep the load on the 3.3V pin below 200-250mA for stability, especially when WiFi is active.

Q: Is this board compatible with the Arduino IDE?

A: Yes, this ESP8266 NodeMCU V3 is fully compatible with the Arduino IDE. You simply need to add the ESP8266 board manager URL to your preferences and install the package.

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