The photos show a board that I use in Escape Rooms for controlling various props.  The one pictured shows RFID reader, WEMOS, DC/DC converter and Audio module plugged into the top of the board, while and Arduino Uno is plugged into the bottom.

The board has provision for connecting to many sensors, RFID readers, Relay modules, switched etc.

Here it is used as a test platform to test SPI comms between the WEMOS MASTER and the Arduino UNO SLAVE.  See schematic for details.