ESP8266 WiFi Serial Module Adapter Board (ESP-01, 3.3V/5V)
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Prices updated: 13 Oct 2026
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About this product
A breakout adapter board for the ESP8266 WiFi module in the ESP-01 (ESP8266 1F) form factor. It brings the module's pins out to standard headers so it can be wired to a microcontroller or USB-to-serial adapter for AT-command or firmware work. The listing states support for 3.3V and 5V operation.
Specifications
- Module
- ESP8266 (ESP-01 / 1F form factor)
- Supply voltage
- 3.3V / 5V
- Wireless
- WiFi (802.11 b/g/n)
- Interface
- Serial (UART)
- Type
- Breakout adapter board
Frequently asked questions
Which voltage should I power the ESP-01 adapter with?
The listing states 3.3V and 5V support. The ESP8266 module itself runs on 3.3V and its logic pins are not 5V tolerant, so when connecting to a 5V board use 3.3V logic levels on the UART lines.
Can I use it with an Arduino?
Yes, it can be wired to the Arduino serial pins for AT commands. Make sure the UART levels are 3.3V, provide a stable supply, and pull GPIO0 low when you need to enter flash mode for firmware upload.
