ESP-01 Adapter 3.3V 5V

The ESP-01 Adapter 3.3V 5V board lets you use an ESP-01 or ESP-01S ESP8266 Wi-Fi module with 5 V boards such as the Arduino Uno, Nano and Mega. It has an on-board 3.3 V regulator that powers the module from 5 V, and a logic level converter on the serial lines so 5 V TX and RX signals do not damage the 3.3 V ESP8266. The module simply plugs into its 8-pin socket.

ESP-01 Adapter Specifications

• Compatible modules: ESP-01 and ESP-01S (ESP8266)
• Input voltage: 5 V
• On-board regulator: 3.3 V output for the ESP-01
• Level shifting: 3.3 V to 5 V on the serial (TX and RX) lines
• Module socket: 2 × 4 female header, 2.54 mm pitch
• Connection header: VCC, GND, TX and RX

ESP-01 Adapter Applications

• Adding Wi-Fi to an Arduino Uno, Nano or Mega with AT commands
• Powering an ESP-01 from a 5 V USB or bench supply
• IoT sensor nodes and MQTT or web-connected projects
• Classroom and prototyping setups with ESP8266 modules

What's in the Box

• 1 × ESP-01 adapter board, 3.3 V / 5 V (ESP-01 module sold separately)

Tip: Connect the adapter's TX to the Arduino's RX and its RX to the Arduino's TX, and share a common ground. This board is an adapter, not a USB programmer, so use a USB-to-serial adapter when you need to flash new firmware to the ESP-01.

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