ESP-01 ESP8266 Serial WIFI Module

The ESP-01 ESP8266 Serial WIFI Module is a tiny Wi-Fi board based on the ESP8266 chip. It can give an Arduino Wi-Fi access through simple AT commands over a serial link, or you can program it directly with the Arduino IDE so it runs on its own as a small Wi-Fi microcontroller with two free GPIO pins. Its small size and low price make it popular for IoT sensors, smart switches and web-connected projects.

ESP-01 ESP8266 Serial WIFI Module Specifications

• Chip: ESP8266, 32-bit, 80 MHz (up to 160 MHz)
• Wi-Fi: 802.11 b/g/n, 2.4 GHz, built-in PCB antenna
• Supply voltage: 3.3 V (pins are not 5 V tolerant)
• Interface: UART serial (TX, RX)
• GPIO: GPIO0 and GPIO2
• Header: 8 pins, 2 × 4, 2.54 mm pitch
• Pins: VCC, GND, TX, RX, CH_PD (EN), RST, GPIO0, GPIO2
• Programming: AT commands, or the Arduino IDE with the ESP8266 core

ESP-01 ESP8266 Serial WIFI Module Applications

• Adding Wi-Fi to an Arduino Uno or Nano
• Smart relay switches and home automation
• Wi-Fi sensor nodes that send data to MQTT or a web server
• Small web servers and remote control pages
• Learning IoT and networking

What's in the Box

• 1 × ESP-01 ESP8266 Wi-Fi module

Tip: Power the module from a separate 3.3 V regulator that can supply at least 300 mA, because the Arduino 3.3 V pin cannot deliver enough current during Wi-Fi transmission. Pull CH_PD (EN) high, use a voltage divider on RX from a 5 V board, and hold GPIO0 LOW during reset to upload new code.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.