Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Core Processor	ESP8266EX
Flash Memory	1MB (8Mbit)
Wi-Fi Standard	IEEE 802.11 b/g/n
Operating Voltage	3.3V DC
Logic Level	3.3V TTL
GPIO Count	2 (GPIO0, GPIO2)
Communication Interface	UART / TTL
Frequency Range	2.4GHz - 2.5GHz
Board Size	24.5 x 14.5 mm
Current Consumption	80mA (Transmit)

5 reviews

Anonymous

Apr 07, 2026

Rating: 5/5

Excellent for IoT projects

Works great with Home Assistant. Stable connection and easy to flash.

Anonymous

Feb 20, 2026

Rating: 3/5

Hard for beginners

Hardware is fine but requires external USB converter to program.

Anonymous

Feb 20, 2026

Rating: 4/5

Good value but mind the voltage

Cheap and effective. Just remember not to feed it 5V directly.

Anonymous

Feb 12, 2026

Rating: 5/5

Compact and reliable

Using these for temperature sensors around the house. No dropouts so far.

Anonymous

Feb 06, 2026

Rating: 5/5

Fast delivery and works

Arrived quickly. Tested with Arduino IDE immediately without issues.

5 FAQ

Q: Can I power this from Arduino 5V pin?

A: No, please use 3.3V. The 5V pin on Arduino may damage the module.

Q: Do I need a USB to TTL converter?

A: Yes, you need a USB to TTL adapter to program the module via UART.

Q: What is the Wi-Fi range?

A: Indoor range is approximately 30 meters depending on obstacles.

Q: Is Arduino IDE supported?

A: Yes, you can install the ESP8266 board manager package in Arduino IDE.

Q: How much flash memory is available?

A: This module comes with 1MB of flash memory for user programs.

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