Waveshare ESP-12F WiFi Module Based on ESP8266 with Built-in 32Mbit Flash in Small SMD22 Package Onboard PCB Antenna and Metal Shield

The ESP-12F is a WiFi module based on ESP8266, with built-in 32Mbit Flash, in the small SMD22 package. There're also onboard PCB antenna and metal shield. In short, it's a small form factor and fairly high cost effective WiFi module.
With the pre-flashed AT firmware, you can control the module through UART AT commands easily. The module integrates MCU inside, supports other developments like Lua/Micropython/ to achieve flexible and fast prototyping, make it easy to integrate the module into IoT applications.
802.11b/g/n Wi-Fi SOC. Integrated Tensilica L106 ultra-low-power 32-bit micro MCU, run at 80 MHz and 160 MHz frequency, supports RTOS. Built-in 1-ch 10 bit high precision ADC. Supports UART/GPIO/ADC/PWM/I2C.
SMD22 package Integrated Wi-Fi MAC/ BB/RF/PA/LNA. Supports multi sleep modes, deep sleep current as low as 20uA. UART baudrate up to 4Mbps. Embedded Lwip protocol stack. Supports STA/AP/STA+AP operation mode.
Supports Smart Config (APP) / AirKiss (WeChat), one key networking. Supports UART local firmware upgrade and/or remote firmware upgrade (FOTA). AT commands for getting started fast. Supports secondary development, integrated Windows / Linux environment.