ESP8266-01 Introduction and pin configuration

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 Reset the chip connect this pin to GND

        3. CH_PD: Generally it set to HIGH i.e. 3.3V power supply.

        4. TX: Transmitter pin.

        5. RX: Receiver pin.

        6. GPIO0: General purpose digital port. Its pin value is 0 or A0.

        7. GPIO2: General purpose digital port. Its pin value is 2 or A2.

        8. GND: Ground.