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NodeMCU ESP8266 V2 in Bangladesh
NodeMCU ESP8266 V2 in Bangladesh

NodeMCU ESP8266 V2

SKU: 171116002869

Brand: Made in China

Warranty: 3 Days

Model: NodeMCU V3 D1 R1 D1 Mini

৳ 535.06

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Category: ESP8266

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Description of NodeMCU ESP8266 V2

The NodeMCU ESP8266 V2 is an open-source software and hardware development environment built around an inexpensive System-on-a-Chip (SoC) called the ESP8266. The NodeMCU ESP8266 V2, designed and manufactured by Espressif Systems, contains the essential elements of a computer: CPU, RAM, and networking capabilities (Wi-Fi). It can also run a small real-time operating system (RTOS) and can be programmed using an SDK, making it an excellent choice for Internet of Things (IoT) projects of all kinds.

The NodeMCU V2 Development Board based on ESP8266, integrates GPIO, PWM, IIC, 1-Wire and ADC all in one board. Power your development in the fastest way combined with NodeMCU ESP8266 V2 Firmware! This version comes with a CP2102 USB-TTL, supports higher current, and features a slim design.

This board can be used to build IoT and embedded projects, allowing wireless monitoring and control of devices. It can be programmed with Arduino IDE, Lua, or MicroPython.

Technical Specification

Parameter Details
Microcontroller ESP8266 (Tensilica 32-bit Xtensa LX106)
Flash Memory 4 MB
USB Interface CP2102
Operating Voltage 3.3V
Input Voltage (via USB) 5V
Clock Speed 80 MHz (up to 160 MHz)
I/O Pins 17
Analog Input 1 (10-bit ADC)
Wi-Fi Standard 802.11 b/g/n
Programming Arduino IDE / Lua / MicroPython
Dimensions 49mm x 26mm ± 2%

How to Choose an ESP8266 Development Board?

When choosing an NodeMCU ESP8266 V2 development board, there are several factors to consider. You should look for a board with a built-in USB-to-UART (CP2102) interface and voltage regulator (AMS1117) so you can easily upload code and power the board from your computer. It’s also helpful to have BOOT and RESET buttons to simplify putting the board into flashing mode or restarting it when needed.

Additionally, check the number and accessibility of GPIO pins, as different boards expose different pins for use in your projects. The board’s size can also be important — smaller boards like the ESP-01 are ideal for compact designs but have limited pins, while larger ones like the NodeMCU offer more flexibility.

ESP8266 Boards Comparison

The ESP8266 12-E chip comes with 17 GPIO pins. Not all GPIOs are exposed in all ESP8266 development boards, some GPIOs are not recommended to use, and others have very specific functions.

The best ESP8266 development board for your project will depend on what you intend to do. We’ll just cover a short selection of the most popular ESP8266 boards. The table below shows a quick comparison of the boards.
 

Feature NodeMCU V2 NodeMCU V3 Wemos D1 Mini ESP-01
Breadboard Friendly Yes No (too wide) Yes Yes (with adapter)
USB Port Type Mini USB Micro USB Type-C None
Flash Memory 4MB 4MB 4MB 1MB
USB–Serial Chip CP2102 CH340G CH340G External required
Power Options USB / Vin / 3.3V USB / Vin / 3.3V USB / 5V / 3.3V 3.3V only
GPIO Pins 17 17 11 4 ( Including TX and RX)
ADC Pin 1 1 1 1
Size Medium Slightly longer Compact Very small

What is the difference between NodeMCU ESP8266 V2, Arduino Uno?

If you compare performance, cost, power, and functionality, then NodeMCU ESP8266 V2 is far better than Arduino UNO. NodeMCU ESP8266 supports WiFi for web servers, and it can be set in STA or AP mode. You can update the firmware of ESP8266 over the air (OTA). With FreeRTOS, you can run parallel tasks on the ESP8266.

The only disadvantage of the ESP8266 is that it has only one built-in analog pin, so you cannot interface more than one analog device to it. To overcome this limitation, you can use external ADC modules like MCP3008 or PCF8591, which allow you to connect multiple analog sensors to the ESP8266.

Best Pins to Use – NodeMCU ESP8266 V2

One important thing to notice about ESP8266 is that the GPIO number doesn’t match the label on the board silkscreen. For example, D0 corresponds to GPIO16 and D1 corresponds to GPIO5. The following table shows the correspondence between the labels on the silkscreen and the GPIO number, as well as which pins are the best to use in your projects, and which ones you need to be cautious about.

Pin GPIO Function Safe Remarks
D0 GPIO16 Wake / No PWM / No I2C ⚠️ HIGH at boot; used to wake up from deep sleep
D1 GPIO5 SCL / I2C General purpose
D2 GPIO4 SDA / I2C General purpose
D3 GPIO0 Flash button ⚠️ Connected to FLASH button; boot fails if pulled LOW
D4 GPIO2 Built-in LED ⚠️ HIGH at boot; boot fails if pulled LOW
D5 GPIO14 SCK / SPI General purpose
D6 GPIO12 MISO / SPI General purpose
D7 GPIO13 MOSI / SPI General purpose
D8 GPIO15 CS / SPI ⚠️ Required for boot; boot fails if pulled HIGH
RX GPIO3 UART RX ⚠️ Used for flashing/debugging; careful if repurposed
TX GPIO1 UART TX ⚠️ Used for flashing/debugging; careful if repurposed
CLK GPIO6 Flash clock Connected to onboard Flash memory – not for general use
SDO GPIO7 Flash data out Used by internal SPI Flash – do not use
SD1 GPIO8 Flash data I/O Connected internally to Flash – avoid use
SD2 GPIO9 Flash I/O Used by SPI Flash – not available on NodeMCU boards
SD3 GPIO10 Flash I/O Connected internally to Flash – not safe to use
CMD GPIO11 Flash command Reserved for Flash – do not use
A0 ADC0 Analog input ⚠️ Analog input pin, cannot be configured as output
EN Enable / Chip Power ⚠️ Must be HIGH for normal operation
RST Reset pin ⚠️ Active LOW; resets the MCU
3V3 Power Output 3.3 V output; limited current
GND Ground Common ground reference

GPIO pins 6–11 (Secure Digital Input / Output Interface) are normally connected to the onboard SPI flash memory on most ESP8266 boards. Therefore, these pins should not be used in regular projects unless you are designing a custom ESP8266 module from scratch. To view the complete pinout diagram, check the pinout diagram images in our image gallery.

What can you do with NodeMCU ESP8266 V2?

You can build an embedded and IoT project using NodeMCU ESP8266.

A few of the examples are given below.

  • IoT Home Automation
  • Web Controlled Servo using ESP8266
  • Air Pollution Monitoring Using ESP8266
  • Wi-Fi-controlled robot
  • Humidity and Temperature Monitoring

How to Program?

There are many ways to program the NodeMCU ESP8266 V2 using different development environments and programming languages, such as the Thonny IDE, PlatformIO with Visual Studio Code, and the Arduino IDE. A quick search on Google will yield numerous online tutorials covering these platforms. From these, below is a tutorial showing how to program the ESP8266 using the Arduino IDE.

Some notable examples include:

Warranty and Replacement

TechShopBD offers up to one year of warranty and replacement support for its products, depending on the supplier(s) and product(s). The specific warranty duration for each product can be found on the respective product page. To be eligible for warranty and replacement support, customers must agree to our terms and conditions.

Packaging Details

  • 1 × NodeMCU ESP8266 V2

Documents

Attention

Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please don’t hesitate to contact us to determine if further action is required.

Need Help?

Our engineers are available to assist you. If you have any queries, please leave a comment below or call 09678110110 from 09:00 am to 06:00 pm (7 days a week). You can also reach us via WhatsApp or Facebook Inbox

Documentation of NodeMCU ESP8266 V2

Ratings & Reviews of NodeMCU ESP8266 V2

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By Rafius sami Mahim sami on 05 Feb 2024
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By kaan kulte kulte on 09 Jul 2023
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By Shayla Farzana on 21 Oct 2021
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Questions & Answers about NodeMCU ESP8266 V2

Questions answered by Techshop (14)

ESP8266 NodeMCU V2 ar ESP8266 NodeMCU V3 er majhe ki parthokoo

By mostakahmad028@gmail.com on 27 Mar 2024

Board দুইটিতে শুধুমাত্র UART Communication Chip এর পার্থক্য রয়েছে। যেখানে ESP8266 NodeMCU V3 বোর্ডে CH340 USB to Serial Converter Chip ব্যবহার করা হয়েছে। অপরদিকে ESP8266 NodeMCU V2 বোর্ডে CP2102 USB to Serial Converter Chip ব্যবহার করা হয়েছে।

By TechShopBD on 28 Mar 2024

আমি লোলিন ভার্সন ৩ নিয়েছি অনেক চেষ্টার পরেও কোড আপলোড করতে সক্ষম হ‌ইনি আপনারা কি কোনো ভাবে সাহায্য করতে পারেন?

By shanawazpbt97@gmail.com on 16 Nov 2023

I tried every possible way to connect this module with my wifi but failed. I tried chancing the router, codes, also flashed and tried again from the beggning just to connect to my wifi. Is this waste of money?? [ESP8266 NodeMCU V2 Development Board with CP2102 Model No: WIR-00074]

By aqibmehedi007 on 15 Jul 2023

Please mention your order id. You can contact us on Facebook page or call: 01841110110

By TechShopBD on 15 Jul 2023

Can I connect it with the blynk app?

By itsmilki98@gmail.com on 25 May 2023

Can I connect it with the blynk app?

By itsmilki98@gmail.com on 25 May 2023

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What is the price of NodeMCU ESP8266 V2 in Bangladesh?

The latest and best price of NodeMCU ESP8266 V2 in Bangladesh is BDT 535.06 Taka. You can purchase the NodeMCU ESP8266 V2 at the best price on TechShopBD.com or visit our office to pick yours up today.

Where to buy a NodeMCU ESP8266 V2 in Bangladesh?

You can easily buy the NodeMCU ESP8266 V2 at the best price in Bangladesh from TechShopBD.com (our online store) or visit our physical office.

Top Reasons to Choose TechShopBD for Purchasing NodeMCU ESP8266 V2

When you choose TechShopBD for purchasing NodeMCU ESP8266 V2, you’re not just buying a product — you're investing in quality, support, and convenience. Here’s why thousands of customers trust us:

  • Competitive Prices: We offer NodeMCU ESP8266 V2 at highly competitive rates, ensuring great value for your money.
  • High-Quality Products: All our products are high-quality and sourced directly from trusted manufacturers and suppliers.
  • Quality Passed: Every product undergoes strict quality checks to ensure it meets high performance and durability standards.
  • Expert Technical Support: Our experienced technical team is always ready to assist you with any queries or technical issues.
  • Warranty & Replacement Facility: Enjoy peace of mind with our warranty coverage and an easy replacement process for eligible products.
  • After-Sales Support: Get reliable assistance even after your purchase to ensure a smooth and hassle-free experience.
  • Fast Delivery: We ensure quick and safe delivery across Bangladesh.
  • Product Documentation: Access detailed manuals and datasheets to help you understand and use your NodeMCU ESP8266 V2 effectively.
  • Blogs and Videos: Explore step-by-step tutorials, detailed blog posts, and helpful video guides to easily set up and get the best performance from your NodeMCU ESP8266 V2.