ESP 8266 Microcontroller: The ESP8266 is a low-cost Wi-Fi microchip, with built-in TCP/IP networking software , and microcontroller capability, produced by Espressif Systems. The chip was popularized in the English-speaking maker community in August 2014 via the ESP-01 module, made by a third-party manufacturer Ai-Thinker. This small module allows microcontrollers to connect to a Wi-Fi 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. Connecting to ESP 8266: We need many components to connect to the esp 8266 controller, Like, Breadboard Sensors Jumper Wire There are different ways to program the ESP8266 such as micropython (a subset of python) or using the Arduino IDE . In this lesson, we will be using the Arduino IDE as it has a simple interface with built-in examples. Analog to Digital Converter : Analog to Digital Converter (ADC ) is