ESP-07S-I — Ai-Thinker
ESP8266 WiFi module, 4MB flash, U.FL antenna, industrial range -40..+85C

Category: Module

Pricing
  LCSC         $1.28
  Mouser       $1.57
  DigiKey      $1.62
  Farnell      $1.77

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