Micro Controller ESP8266



The ESP8266 is a WiFi microchip, with built-in TCP/IP networking software, and micro controller capability, produced by Espressif Systems in Shanghai, China.The chip first came to the attention of Western makers in August 2014 with the ESP-01 module, made by a third-party manufacturer Ai-Thinker. This small module allows micro controllers to connect to a WiFi network and make simple TCP/IP connections using Hayes-style commands. However, at first, there was almost no English-language documentation on the chip and the commands it accepted The very low price and the fact that there were very few external components on the module, which suggested that it could eventually be very inexpensive in volume, attracted many hackers to explore the module, the chip, and the software on it, as well as to translate the Chinese documentation.


  • Memory: 32 KB instruction RAM, 32 KB instruction cache RAM, 80 KB user-data RAM, 16 KB ETS system-data RAM
  • External QSPI flash: up to 16 MB is supported (512 KB to 4 MiB typically included)
  • IEEE 802.11 b/g/n WiFi: Integrated TR switch, balun, LNA, power amplifier and matching network, WEP or WPA/WPA 2 authentication, or open networks
  • 17 GPIO pins
  • Serial Peripheral Interface Bus (SPI)
  • (software implementation)
  • interfaces with DMA (sharing pins with GPIO)
  • UART on dedicated pins, plus a transmit-only UART can be enabled on GPIO 2
  • 10-bit ADC (successive approximation ADC)
  • Additional information
  • Gross weight: 0.15 g
  • Manufacturer part number: ESP8266


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