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ESP8266 WIFI Module ESP-01 8MB RobotDYN

The ESP8266 ESP-01 is a compact and powerful WiFi module that enables microcontrollers to connect to wireless networks and the internet. Built around the ESP8266 System-on-Chip (SoC), this module can function either as a WiFi adapter for another microcontroller or as a standalone microcontroller itself. Unlike traditional WiFi shields, the ESP-01 contains its own processor and GPIOs, allowing it to handle inputs, outputs, and networking tasks independently. This makes it a cost-effective and space-saving solution for IoT and embedded projects.

Package Includes

  • 1 × ESP8266 ESP-01 WiFi Module
26.25 AED 26.25 AED (Tax included)

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Features

  • Integrated WiFi SoC: Self-contained System-on-Chip design.
  • 802.11 b/g/n Support: Reliable 2.4GHz WiFi connectivity.
  • Standalone Operation: Can act as a microcontroller.
  • Multiple GPIOs: Depending on firmware, up to 9 GPIOs supported.
  • AT Command Support: Easily controlled via serial interface.
  • Compact Size: Ideal for space-constrained applications.

Specifications

  • Chipset: ESP8266
  • WiFi Standard: 802.11 b/g/n (2.4GHz)
  • Operating Voltage: 3.3V DC
  • Logic Level: 3.3V (Not 5V tolerant)
  • Communication: UART (Serial)
  • Flash Memory: Typically 1MB (varies by version)
  • Modes: Station (STA), Access Point (AP), STA+AP

Pinout

RobotDyn - WIFI ESP-01 - ESP8266 Serial Transceiver Module, 8Mbit flash memory. For Arduino, STM32, Raspberry pi WI-FI projects : Amazon.ca: Electronics

Pin Description
VCC 3.3V Power Supply
GND Ground
TX UART Transmit
RX UART Receive
CH_PD / EN Chip Enable (Pull HIGH to enable)
GPIO0 General Purpose I/O (Used for flashing)
GPIO2 General Purpose I/O
RST Reset

Operating Modes

  • Station (STA): Connects to an existing WiFi network.
  • Access Point (AP): Creates its own WiFi network.
  • STA + AP: Works in both modes simultaneously.

Typical Applications

  • IoT devices
  • Wireless sensor networks
  • Home automation
  • Remote monitoring systems
  • Web server projects

How to to work with Arduino:

Step 1: Install Arduino IDE

Download and install Arduino IDE.

Step 2: Add ESP8266 Board URL

File → Preferences → "Additional Boards Manager URLs":
http://arduino.esp8266.com/stable/package_esp8266com_index.json

Step 3: Install ESP8266 Boards

Tools → Board → Boards Manager → Search "ESP8266" → Install "esp8266 by ESP8266 Community"

Step 4: Select ESP-01 Board

Tools → Board → ESP8266 Modules → Generic ESP8266 Module
Flash Size: 1MB (8Mb), Upload Speed: 115200

Step 5: Connect ESP-01

  • VCC → 3.3V

  • GND → GND

  • TX → RX, RX → TX

  • CH_PD → 3.3V

  • GPIO0 → GND (for programming)

Step 6: Upload Example

File → Examples → ESP8266 → Blink → Upload
After upload, disconnect GPIO0 from GND and reset ESP-01

Step 7: Use WiFi

Use the WiFi library in sketches to connect to your network.

Basic AT Command Example (Arduino)

#define WIFI_NAME "Your_WiFi_Name"
#define WIFI_PASS "Your_WiFi_Password"

void setup() {
  Serial.begin(115200);
  delay(2000);

  Serial.println("AT");               // Test communication
  delay(1000);

  Serial.println("AT+CWMODE=1");      // Set to Station mode
  delay(2000);

  Serial.print("AT+CWJAP=\"");
  Serial.print(WIFI_NAME);
  Serial.print("\",\"");
  Serial.print(WIFI_PASS);
  Serial.println("\"");               // Connect to WiFi
  delay(5000);

  Serial.println("AT+CIPMUX=1");      // Enable multiple connections
  delay(1000);

  Serial.println("AT+CIPSERVER=1,80"); // Start server on port 80
}

void loop() {
}

Important Notes

  • Always use a stable 3.3V power supply (minimum 300mA recommended).
  • Do NOT connect directly to 5V logic without level shifting.
  • GPIO0 must be LOW during boot for flashing firmware.