Description
Reviews
| 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 |
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.
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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