ESP Easy is a free and open source MCU firmware for the Internet of things (IoT).
It runs on ESP8266[2] Wi-Fi based MCU (microcontroller unit) platforms for IoT from Espressif Systems.
Users simply hook up and read/control over simple web requests without having to write any code at all themselves, including firmware upgrades using OTA (Over The Air) updates.
[5][6][7][8] The ESP Easy firmware can be used to turn modules using one of the many processors made by Espressif into simple multifunction sensor and actuator devices for home automation platforms.
The ESP Easy firmware also offers some low-level actuator functions to control relays.