**What is the ESP8266?** The ESP8266 is a Wi-Fi microcontroller with built-in TCP / IP networking software. **Who is the ESP8266 produced by?** The ESP8266 is produced by *Espressif Systems.* **Where is the ESP8266 produced?** The ESP8266 is produced in *Shanghai, China.* **What chip is similar to the ESP8266 but with 1 MiB of built-in flash memory?** The *ESP8285* is a similar chip to the ESP8266 but with 1 MiB of built-in flash memory. ... **What microprocessor does the ESP8266 have?** The ESP8266 has an L106 32-bit RISC microprocessor based on the Tensilica Diamond Standard 106Micro. > **What is the clock speed of the microprocessor in the ESP8266?** > The clock speed of the microprocessor in the ESP8266 is *either 80 MHz or 160 MHz.* **What Wi-Fi standard does the ESP8266 support?** The ESP8266 supports the *IEEE 802.11 b/g/n* Wi-Fi standard. ... **How many GPIO pins does the ESP8266 have?** The ESP8266 has *18* GPIO pins. ... **What is the successor to the ESP8266?** The successor to the ESP8266 is the *ESP32 series.* > **Which successor chip is pin-compatible with the ESP8266?** > The successor chip that is pin-compatible with the ESP8266 is the *ESP32-C3.*