The ESP01 / ESP01S Adapter Board is a compact breakout and interface board designed to simplify the use of ESP8266 ESP-01 and ESP-01S WiFi modules. It provides proper pin spacing, power routing, and easy access to GPIO, UART, and control pins, making development, programming, and integration much more convenient. This adapter is ideal for prototyping, flashing firmware, and embedding ESP-01 modules into larger systems.
Core Module Overview
• Module Type: ESP8266 ESP-01 / ESP-01S adapter board
• Supported Modules: ESP-01 and ESP-01S
• Function: Power, pin breakout, and easy interfacing
• Design Purpose: Development, programming, and integration
Electrical & Interface
• Operating Voltage: 3.3 V DC
• Logic Level: 3.3 V
• Supported Interfaces: UART, GPIO
• Onboard Components: Decoupling capacitor (variant dependent)
• Power Input: External 3.3 V regulated supply
Functional Characteristics
• Provides stable power connection for ESP-01 modules
• Breaks out RX, TX, GPIO0, GPIO2, CH_PD, VCC, GND
• Compatible with breadboards and jumper wires
• Simplifies flashing and debugging workflows
Physical Characteristics
• Board Type: Compact PCB adapter
• Connector Type: 2×4 female socket for ESP-01
• Pin Headers: Standard 2.54 mm pitch
• Lightweight and portable design
Compatibility
• ESP8266 ESP-01 WiFi Module
• ESP8266 ESP-01S WiFi Module
• USB-to-TTL converters
• Arduino and MCU development setups
• IoT prototyping boards
Key Advantages
• Eliminates wiring complexity
• Reduces risk of incorrect connections
• Breadboard-friendly layout
• Ideal for beginners and professionals
Technical Insights
• Requires regulated 3.3 V power (do not use 5 V)
• GPIO0 must be pulled LOW for flashing mode
• CH_PD must be held HIGH for normal operation
• External USB-TTL adapter needed for programming
Applications
• ESP8266 firmware flashing
• IoT WiFi prototyping
• Home automation projects
• Embedded wireless systems
• Educational ESP8266 development
Pro Tip
• Always use a stable 3.3 V regulator with sufficient current
• Double-check GPIO0 state before flashing
• Avoid hot-plugging ESP modules
• Use short jumper wires for reliable UART communication
Package Includes
• 1 × ESP01 / ESP01S Adapter Board