ESP8266 ESP-01 Serial WiFi Adapter Module — 3.3V / 5V Breakout PCB for Arduino & UART

ESP8266 ESP-01 Serial WiFi Adapter Module — 3.3V / 5V Breakout PCB

This ESP-01 adapter breakout board converts the ESP8266 ESP-01's non-standard 2mm pitch connector to a standard 2.54mm (0.1") pitch header, making it breadboard-compatible and easy to wire to Arduino or any UART-capable microcontroller. It includes a 3.3V LDO regulator so the module can be powered directly from a 5V Arduino supply without a separate regulator.

Key Specifications

Parameter	Value
Compatible Module	ESP8266 ESP-01 / ESP-01S
Input Voltage	5V (onboard 3.3V LDO regulator)
ESP-01 Supply	3.3V (regulated)
Header Pitch	2.54mm (0.1") — breadboard compatible
UART Pins Exposed	TX, RX, GND, VCC, EN, RST, GPIO0, GPIO2
Programming Support	GPIO0 / RST pins accessible for flash mode

Why Use an ESP-01 Adapter?

• ✅ Breadboard compatible — 2.54mm pitch fits standard breadboards directly
• ✅ Onboard 3.3V regulator — power from 5V Arduino without external regulator
• ✅ All pins broken out — TX, RX, GPIO0, GPIO2, EN, RST all accessible
• ✅ Flash mode support — GPIO0 accessible for firmware programming
• ✅ Compact design — minimal footprint on breadboard

Typical Applications

• ESP-01 AT command WiFi bridge for Arduino Uno/Mega
• ESP-01 breadboard prototyping and development
• ESP-01 firmware flashing via UART adapter
• IoT sensor WiFi connectivity via AT commands
• ESP-01 GPIO control from 5V microcontroller

Package Contents

• 1 × ESP8266 ESP-01 Serial WiFi Adapter Breakout PCB

ESP-01 module not included.

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