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Overview and Specifications:

Based on ESP8266 Soc, it has an easy-to-use user input and output interface; it is convenient for users to develop quickly;
Migration  the NodeMcu's task management framework;
Implemented a complete I2C protocol to (not limited) drive the onboard capacitive button module (MPR121);
The interrupt mode is used to respond to the button, and the entire process of generating a button event and send event to the main task is completely implemented;
The IO port, which is very tight for the ESP8266 module, implements a SPI-based 3wire 9-bit LCD driver to occupy the fewest IO ports.
With 5 capacitive buttons.

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