ESP-12F-I — Ai-Thinker
ESP8266 WiFi module, 4MB flash, PCB antenna, industrial range -40..+85C

Category: Module

Pricing
  LCSC         $1.02
  Mouser       $1.34
  DigiKey      $1.43
  Farnell      $1.46

Manufacturer: https://www.ai-thinker.com