# ESP-01, ESP8266 adapter module

- Page: https://sigmanortec.ro/en/esp-01-esp8266-adapter-module
- Price: 4.60 RON
- Availability: In stock; 1-2 zile
- Reference: 33579 · EAN: 5941636951067
- Category: Mechatronics and IoT > Adapters and Converters
- Package (shipping data): 0.003 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Description

The adapter for ESP-01, ESP8266 simplifies prototyping and rapid integration into IoT projects, provides a stable interface for programming and testing, has easily accessible pins for connection to a breadboard, includes support for 3.3V power supply and UART serial signals, is compact and robust for use in the laboratory or production.
The PCB adapter for ESP-01 and ESP-01S is the perfect solution for quick integration of ESP8266 WiFi modules into breadboard projects. The device offers a stable interface for programming and testing, with easily accessible pins for direct connection to a standard breadboard, and includes support for 3.3V power supply and UART serial signals.
An important advantage of this adapter is the presence of a 0.1uF decoupling capacitor, which ensures stable power supply and prevents fluctuations or unwanted resets of the ESP module during intense data transmissions.
Its compact and robust design makes it suitable for both laboratory use and production, providing a reliable testing platform for any IoT enthusiast or developer working with ESP-01 or ESP-01S.
Specifications:
Compatibility: ESP-01 and ESP-01S (ESP8266)
Compatible with: standard breadboard
Recommended power supply: 3.3V
Includes: 0.1uF decoupling capacitor
Recommended UART speed: 15200 baud
Serial setting: NL/CR
Pinout:
Pin
Signal
Description
1
GND
Ground
2
GPIO2
General GPIO / UART1 TX
3
GPIO0
General GPIO / boot select
4
RX
UART RX (data to module)
5
TX
UART TX (data from module)
6
CH_PD/EN
Chip enable (active HIGH)
7
RST
Reset (active LOW)
8
VCC
3.3V Power supply
Usage:
Insert the ESP-01 or ESP-01S module into the adapter socket, with the correct pin orientation.
Connect the adapter to the standard breadboard using the adapter’s exposed pins.
Power the module with 3.3V at the VCC pin and connect GND to the circuit ground.
Connect the TX and RX pins to the UART interface of the microcontroller or USB-UART converters, respecting the TX-RX inversion between devices.
Make sure the CH_PD/EN pin is connected to HIGH (3.3V) to activate the module.
Open the serial monitor and set the speed to 15200 baud with the NL/CR option enabled.
For programming, connect GPIO0 to GND before power-up, then release it after the module enters bootloader mode.
After programming is complete, disconnect GPIO0 from GND and reset the module using the RST pin or by power cycling.