Introduction If you are searching for a low cost WIFI enabled module then you are at right place. ESP8266-01 is a very low cost WiFi enabled chip. Although it has only 2 recognized GPIO pin. But we can make 4 GPIO as well. So let’s start with small info of ESP8266-01. ESP8266-01 are currently of two types that are available in the market 1. ESP8266-01 Blue (512KB Flash memory) 2. ESP8266-01 Black (1024KB Flash memory) Figure 1: ESP8266-01 Blue Figure 2: ESP8266-01 Black ESP-01 has total 8 pins. As you can see in the below picture Figure 3: ESP8266-01 Pin configuration 1. VCC: 3.3V power supply. 2. RESET(RST): To Res