Summary ESP8266 ESP-01 Breadboard Header
ESP8266 is an inexpensive serial-to-wifi transceiver chip that can be used to connect any microcontroller with a serial port to a WiFi network. Because of its simplicity and low cost, it is getting popular among hobbyists for building Internet of Things (IoT) applications. ESP-01 model that provides access to the power supply and I/O pins through a 2x4 male header that the pin arrangements are not breadboard friendly and not labeled. “ESP8266 ESP-01 Breadboard Header” has a 2x4 female header to receive the ESP-01 module and provides easy access to those pins through two single rows male that is breadboard friendly.