![]() The release of the ESP opened the door to WiFi connections with microcontrollers for as little as $5.00! Hackers, makers, tinkerers and hobbyists around the world began ordering these things in bulk. You could utilize a simple two wire serial connection to relay WiFi information! At the heart of the ESP01 was an ESP8266 chip broken out into the 8 pins needed to program it via a microcontroller. In August of 2014 Shanghai-based chip manufacturer, Espressif, released a ultra-cheap Serial to Wi-Fi chip called the ESP-01.
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