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Home / Development Boards & Control Boards / ESP8266 Serial WiFi Module V3, IoT Development Board with CH-340
Development Boards & Control Boards

Attributes

Brand -
Category Electronic Components / Maker DIY / Development Boards & Control Boards
Origin -
Microcontroller ESP8266EX
USB-to-Serial Chip CH340G
Flash Memory 4 MByte
CPU Frequency 80 MHz / 160 MHz
WiFi Standard IEEE 802.11 b/g/n
Logic Level 3.3V
Input Voltage 5V DC via Micro USB
Digital I/O Pins 17 Pins
Analog Input 1 Pin (0-1V range)
Board Size 58mm x 31mm x 13mm

5 reviews

A

Anonymous

Feb 15, 2026

Rating: 3/5

Pin labeling could be better

The silkscreen is a bit small. Had to check the wiki to confirm GPIO numbers.

A

Anonymous

Feb 15, 2026

Rating: 4/5

Good board, install drivers

Make sure you download the CH340 drivers before plugging it in. Otherwise works great.

A

Anonymous

Feb 07, 2026

Rating: 5/5

Great value for money

Bought a pack of three. All functioning correctly. Fast shipping too.

A

Anonymous

Feb 01, 2026

Rating: 5/5

Excellent for Home Automation

Works perfectly with Home Assistant. The CH340 chip is recognized immediately on Windows 10.

A

Anonymous

Jan 28, 2026

Rating: 5/5

Stable WiFi Connection

Been running a temperature sensor for a month without disconnects. Very stable.

5 FAQ

Q: Can I power this via the VIN pin?

A: Yes, you can supply 5V via VIN, but using the Micro USB port is recommended for stability.

Q: Is this compatible with the Arduino IDE?

A: Yes, you can program this board using the Arduino IDE by installing the ESP8266 board package.

Q: Does it support MicroPython?

A: Yes, the ESP8266 chip is fully compatible with MicroPython firmware.

Q: Is the antenna internal or external?

A: This version features a PCB onboard antenna. No external connector is available.

Q: What voltage should I use for the GPIO pins?

A: The GPIO pins are 3.3V logic. Connecting 5V directly may damage the board.

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