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ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash in Bangladesh
ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash in Bangladesh

ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

SKU: 161214002583

Brand: Made in China

Warranty: 3 Days

৳ 195.06

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Category: ESP8266

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Description of ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

The ESP8266 ESP-01 is a Wi-Fi module that allows a microcontroller to easily connect to a Wi-Fi network. This module is a self-contained SoC (System on a Chip); it can provide internet access to a microcontroller, just like using a Wi-Fi shield with an Arduino, or it can be directly programmed to connect to a Wi-Fi network and also perform microcontroller tasks. On the ESP-01 board, only four GPIO pins are exposed.

With built-in TCP/IP support, AT command firmware, onboard LED, and low-power operation, the ESP-01 is ideal for IoT prototyping, home automation, sensor networks, and serial-to-Wi-Fi communication systems.

As a result, the ESP8266 is highly versatile and helps reduce both the cost and size of your projects.

Do Not Use: This module is not 5V tolerant. Applying a direct 5V input may result in immediate and irreversible damage!!!

Technical Specification

Parameter Details
CPU 32-bit RISC Tensilica Xtensa LX106 @ 80 MHz
Instruction RAM 64 KB
Program RAM 96 KB
Flash Memory 1 MB
Wi-Fi Standard IEEE 802.11 b/g/n
GPIO 4 pins
Operating Voltage 3.3V
Typical TX Current 170 mA
Typical RX Current 56 mA
Deep Sleep Current ~10 µA
Dimensions 24.80 × 14.30 mm

ESP01 ESP8266 Serial WiFi Transceiver Module Pinouts

Pin Name Safe to Use? Notes / Boot Behavior / Warnings
1 GND ✔️ Ground reference.
2 GPIO2 ✔️ Safe Usable as normal GPIO. Must be HIGH during boot. Avoid pull-down sensors. Works with LEDs, digital sensors, I²C pull-ups, etc.
3 GPIO0 ⚠️ Usable with restriction Must be HIGH to boot normally. LOW forces flash mode. Safe if device does not pull LOW during reset.
4 RX (GPIO3) ⚠️ Usable but risky Default UART RX. Receives boot messages. Can cause boot failure if pulled LOW by a sensor.
5 TX (GPIO1) ⚠️ Usable but risky Default UART TX. Sends boot logs. Usable as output after disabling UART. Must not be pulled LOW at boot.
6 CH_PD / EN ❌ Not GPIO Must stay HIGH for ESP to run. Never use as GPIO.
7 RST ❌ Not GPIO Active LOW reset. Keep pulled HIGH. Do not use as GPIO.
8 VCC (3.3V) ✔️ Requires a stable 3.3V supply with 200–250 mA capability.

Power Requirement

  • Operating voltage: 3.3V only
  • Peak current during Wi-Fi transmission: up to 200 mA
  • Not 5V tolerant — direct 5V connection will damage the module
  • When using a 5V MCU (Arduino Uno, Mega, etc.):
    • Use a voltage divider on the MCU TX → ESP01 RX line
    • ESP01 TX → MCU RX can be connected directly (3.3V logic is read as HIGH)

For stable operation, a dedicated 3.3V power supply is recommended unless using an ESP01 adapter board with onboard regulator and level shifting.


How to Program?

1. Using AT Firmware (Default)

The module comes with AT commands pre-installed, allowing direct configuration through any serial terminal at 115200 baud (Both NL & CR).

Example:

  • AT → Response: OK
  • AT+CWMODE=1 → Station (STA) mode
  • AT+CWLAP → Scan available Wi-Fi networks

2. Using Custom Firmware

To upload custom code (Arduino IDE, ESP8266 SDK, or Lua):

A quick search on Google will yield numerous online tutorials covering these platforms. Some notable examples include:


Application

The ESP01 ESP8266 module is ideal for:

  • IoT automation
  • Smart home devices
  • Wireless sensor networks
  • Wi-Fi-enabled relays and switches
  • Remote data logging
  • Serial-to-Wi-Fi communication
  • Cloud-connected monitoring systems
  • MQTT, HTTP, and TCP/IP applications

Packaging Detail

  • 1 × ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

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.


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

Ratings & Reviews of ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

4.67
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24 Ratings and 1 Reviews

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Reviews (1)

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By kaan kulte kulte on 07 Jul 2023
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By Mrinmoy Chowdhury on 21 Oct 2021
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Questions & Answers about ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

Questions answered by Techshop (8)

Does it require flashing firmware?

By Muntaha on 06 Aug 2022

Can I use arduino code on it?how can use this to pc?

By bdabulbasher on 16 Sep 2019

Please see here: https://www.youtube.com/watch?v=P8Z-ZHwNeNI

By TechShopBD on 17 Sep 2019

Any tutorial to interface it with arduino mega 2560?

By Ferdib on 11 Sep 2019

We do not have any.

By TechShopBD on 12 Sep 2019

how long before they're in stock again?

By Shahad on 24 Jan 2018

At least 3 more weeks. If you do not have any urgency, please click on notify me W/A beside product's image. You'll get an e-mail and a sms as soon as the product is available.

By TechShopBD on 25 Jan 2018

Can I use it as like as a remote ?

By saiadahamedbd on 08 Dec 2017

What kind of remote?

By TechShopBD on 09 Dec 2017

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ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash

৳ 195.06

What is the price of ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash in BD?

The latest and best price of ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash in BD is BDT 195.06 Taka. You can purchase the ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash at the best price on TechShopBD.com or visit our office to pick yours up today.

Where to buy a ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash in BD?

You can easily buy the ESP01 ESP8266 Serial WiFi Transceiver Module 1MB Flash at the best price in BD from TechShopBD.com (our online store) or visit our physical office.

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