This adapter module for the ESP01 WiFi module combines a 3.3V regulator circuit with an onboard level conversion circuit to simplify using ESP01 with 5V microcontrollers. It provides a safe, compact solution that reduces wiring and external components while ensuring reliable operation of the ESP01. Key benefits Enables 5V microcontrollers to interface directly with the ESP01 by providing a built in 3.3V regulator and level shifting. Protects ESP01 IO from 5V logic through onboard level conversion, enabling stable serial communication. Simplifies prototyping and small projects by reducing the need for external regulators and separate level shifters. Compact PCB based adapter module designed specifically for the ESP01 WiFi module, facilitating easy integration. Performance focused: stable 3.3V power supply for the ESP01 and reliable voltage translation for control signals. Core attributes Function: power regulation for ESP01 and safe level conversion for 5V MCU interfaces. Compatibility: designed for ESP01 WiFi module; compatible with common 5V microcontrollers. Size and form: compact adapter module optimized for simple integration with ESP01 projects. Material and construction: PCB based adapter module providing an integrated solution with built in components. Performance: reliable 3.3V supply to the ESP01 and dependable logic level translation for robust communication. Use scenarios Scenario 1: Connecting an Arduino or other 5V microcontroller to an ESP01 for WiFi control. The adapter supplies 3.3V to the ESP01 and translates 5V logic to safe 3.3V levels, enabling straightforward serial communication. Scenario 2: Prototyping of IoT devices where the ESP01 serves as the WiFi module while the main microcontroller runs at 5V. The adapter reduces wiring complexity and eliminates the need for separate level shifters and regulators. Scenario 3: Rapid testing and development of ESP01 based projects. With the onboard regulator and level conversion, you can swap in different 5V controllers without additional hardware for voltage regulation or signal translation. This product provides a reliable, compact, and easy to use solution that integrates the essential power and signal interface needs for ESP01 based applications.