NodeMcu V2.1 chip CH9102X ESP-12F Development Board Module

Features:

Uses new chip CH9102X
High performance-price ratio
Small ,easily embedded to other products.
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP+STA

Supports Lua programming

WI-FI enabled
Ard–uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the time for configuring and manipulating hardware.
Code like Arduino, but interactive in Lua script.
Node.js style network API
Event-driven API for network applications, which facilitates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.

Introduction:

ESP32-12F is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology, power and RF properties best, which is safe, reliable, and scalable to a variety of applications.