ESP-01M-I — Ai-Thinker
ESP8266 WiFi module, 1MB flash, PCB antenna, industrial range -40..+85C

Category: Module

Pricing
  LCSC         $0.78
  Mouser       $0.94
  DigiKey      $1.01
  Farnell      $1.06

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