There exists a couple of different modules based on the ESP8266, they are named ESP-XX, where XX is a number ranging from 01 to 13 (as of publication of this tutorial). We love great (and cheap) hardware and figured it was time for us to create an example where we made use of the ESP8266-module. The price point makes it perfect for makers that want to explore the Internet Of Things. Equipped with SPI and UART interfaces and depending on the module, a number of GPIOs. You can find the module for as low as $2 on eBay. If you have not heard of this module before it is a 802.11b/g/n WiFi module. Today there is an Arduino-compatible SDK available and many more libraries have been written for it. At the time of the publishing of that article not much was known about the cheap WiFi module – however the the module was received with open arms by the maker/hacker community and a lot of interesting community projects have been created using it. It’s been roughtly a year since Hackaday published the article “New chip alert: The ESP8266 WiFi module (It´s $5)”.
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