WiFi LED information panel built on ESP8266
Using either WS2812 kind of LED strip or MAX7219 based LED matrix modules.
Video presentation in Czech language here: https://youtu.be/nCY0f-b_-vU
Updated exactly a year later for OpenAlt 2019 - added complete application "clock" using NodeMCU modules u8g2d, sntp, rtctime and enduser_setup.
MicroUSB connector that fits to the PCB is BI0001715, found e.g. here https://www.aliexpress.com/i/32763236347.html