Description:

This is a mini wifi development board with 4MB (or 16MB optional) flash based on ESP-8266EX. It has a CH340 Chip on board, so you can directly connect to your computer to program it. You can program it with Arduino, or NodeMCU, or even micropython.


Specifications:

• Based on ESP-8266EX
• Operating Voltage: 3.3V
• Digital I/O Pins: 11
• Analog Input Pins: 1(3.2V Max)
• Clock Speed: 80/160MHz
• Flash: 4M or 16M Bytes
• Size: 34.2*26.2mm
• Weight: 3g

• Reference Link
• ESP8266EX Datasheet