ESP-01 ESP8266 Serial WiFi Module

📡 ESP-01 module based on ESP8266 WiFi SoC
🔌 UART serial interface for easy communication with MCU
⚡ 3.3V operation (requires stable 3.3V supply)
🌐 Enables WiFi connectivity for IoT and smart projects
📶 Supports Station / Access Point modes
🧩 Ideal for wireless sensors, switches, and automation
🛠️ Programmable via USB-to-Serial adapter (ESP-01 programmer)
✅ Compact, low-cost solution for adding WiFi to projects

SKU: aA1628 Category: ESP WiFi Module Tags: ESP WiFi Module., ESP8266, WiFi

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Description

ESP-01 ESP8266 Serial WiFi Module

🔌

Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
ESP-01	VCC/GND/TX/RX	3.3V only / GND / board RX pin / board TX pin

📟

ESP-01 ESP8266 Serial WiFi Module

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

Wrap

ESP-01 ESP8266 Serial WiFi Module - Arduino Uno

ESP-01 ESP8266 Serial WiFi Module - Arduino Nano

ESP-01 ESP8266 Serial WiFi Module - Arduino Mega

ESP-01 ESP8266 Serial WiFi Module - ESP32

ESP-01 ESP8266 Serial WiFi Module - ESP8266

ESP-01 ESP8266 Serial WiFi Module - STM32

ESP-01 ESP8266 Serial WiFi Module - Raspberry Pi Pico

📄 File: esp-01_esp8266_serial_wifi_module_-_arduino_uno.inoArduino Uno

462 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=2, TX=3 on Arduino Uno. 3.3V-only for power AND logic.

6#include <SoftwareSerial.h>

7SoftwareSerial LINK_SERIAL(2, 3);

9void setup() {

10 Serial.begin(115200);

11 LINK_SERIAL.begin(115200);

12 LINK_SERIAL.println("AT");

13 LINK_SERIAL.println("AT+CWMODE=1");

14}

16void loop() {

17 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

18 if (Serial.available()) LINK_SERIAL.write(Serial.read());

19}

📄 File: esp-01_esp8266_serial_wifi_module_-_arduino_nano.inoArduino Nano

463 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=2, TX=3 on Arduino Nano. 3.3V-only for power AND logic.

6#include <SoftwareSerial.h>

7SoftwareSerial LINK_SERIAL(2, 3);

9void setup() {

10 Serial.begin(115200);

11 LINK_SERIAL.begin(115200);

12 LINK_SERIAL.println("AT");

13 LINK_SERIAL.println("AT+CWMODE=1");

14}

16void loop() {

17 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

18 if (Serial.available()) LINK_SERIAL.write(Serial.read());

19}

📄 File: esp-01_esp8266_serial_wifi_module_-_arduino_mega.inoArduino Mega

431 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=19, TX=18 on Arduino Mega. 3.3V-only for power AND logic.

6#define LINK_SERIAL Serial1

8void setup() {

9 Serial.begin(115200);

10 LINK_SERIAL.begin(115200);

11 LINK_SERIAL.println("AT");

12 LINK_SERIAL.println("AT+CWMODE=1");

13}

15void loop() {

16 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

17 if (Serial.available()) LINK_SERIAL.write(Serial.read());

18}

📄 File: esp-01_esp8266_serial_wifi_module_-_esp32.inoESP32

424 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=16, TX=17 on ESP32. 3.3V-only for power AND logic.

6#define LINK_SERIAL Serial1

8void setup() {

9 Serial.begin(115200);

10 LINK_SERIAL.begin(115200);

11 LINK_SERIAL.println("AT");

12 LINK_SERIAL.println("AT+CWMODE=1");

13}

15void loop() {

16 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

17 if (Serial.available()) LINK_SERIAL.write(Serial.read());

18}

📄 File: esp-01_esp8266_serial_wifi_module_-_esp8266.inoESP8266

462 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=D7, TX=D8 on ESP8266. 3.3V-only for power AND logic.

6#include <SoftwareSerial.h>

7SoftwareSerial LINK_SERIAL(D7, D8);

9void setup() {

10 Serial.begin(115200);

11 LINK_SERIAL.begin(115200);

12 LINK_SERIAL.println("AT");

13 LINK_SERIAL.println("AT+CWMODE=1");

14}

16void loop() {

17 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

18 if (Serial.available()) LINK_SERIAL.write(Serial.read());

19}

📄 File: esp-01_esp8266_serial_wifi_module_-_stm32.inoSTM32

427 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=PA10, TX=PA9 on STM32. 3.3V-only for power AND logic.

6#define LINK_SERIAL Serial1

8void setup() {

9 Serial.begin(115200);

10 LINK_SERIAL.begin(115200);

11 LINK_SERIAL.println("AT");

12 LINK_SERIAL.println("AT+CWMODE=1");

13}

15void loop() {

16 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

17 if (Serial.available()) LINK_SERIAL.write(Serial.read());

18}

📄 File: esp-01_esp8266_serial_wifi_module_-_raspberry_pi_pico.inoRaspberry Pi Pico

434 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// RX=1, TX=0 on Raspberry Pi Pico. 3.3V-only for power AND logic.

6#define LINK_SERIAL Serial1

8void setup() {

9 Serial.begin(115200);

10 LINK_SERIAL.begin(115200);

11 LINK_SERIAL.println("AT");

12 LINK_SERIAL.println("AT+CWMODE=1");

13}

15void loop() {

16 if (LINK_SERIAL.available()) Serial.write(LINK_SERIAL.read());

17 if (Serial.available()) LINK_SERIAL.write(Serial.read());

18}

Project Notes:

Bare ESP-01 WiFi module - used as a UART AT-command WiFi peripheral for another board.

Specification

WeightWeight	10 g
Dimensions	2,4 × 1,4 × 0,3 cm
Product Name	ESP-01 ESP8266 Serial WiFi Module
Type	WiFi Module / IoT Module
Controller	ESP8266
Interface	UART Serial (TX/RX)
Operating Voltage	3.3V DC
Operating Current	70–200 mA (typical)
WiFi Standard	IEEE 802.11 b/g/n
Frequency	2.4 GHz
Transmission Power	20 dBm (typical)
Antenna	PCB Antenna
Operating Temperature Range	-40°C – +125°C
Mounting Type	PCB Module / Breadboard Compatible
Material	FR-4 PCB with SMD Components
Applications	IoT Projects, Arduino / ESP8266 Integration, Smart Home, Wireless Communication
Package Contents	1× ESP-01 ESP8266 Serial WiFi Module

Customer Reviews

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