ESP-32U-I — Ai-Thinker
ESP32 WiFi+BLE module, 4MB flash, U.FL antenna, industrial range -40..+85C

Category: Module

Pricing
  LCSC         $2.37
  Mouser       $3.02
  DigiKey      $3.12
  Farnell      $3.30

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