Connect LEDs (3.3V Red, Green, Blue, Yellow LEDs) to pins D2, D3, D6, and D10 on the ESP8266 board. Connect pin D1 to indicate network and cloud connectivity. Connect the negative (shorter) lead of ...

A very simple Arduino UNO R4 project that lets you send messages to the built-in LED matrix using a web page. When the board starts, it connects to Wi-Fi and gets an IP address from DHCP. The IP ...