Product description
The Nextion IO Adapter is made specially to work with Nextion Enhanced & Intelligent HMI Display Series which covers standard 2.4", 2.8", 3.2", 3.5", 4.3", 5.0", 7.0" and 10.1".The board allows Nextion display users to have extended IO to connect with external devices.
The small board pins out GPIOs of Nextion display to 2.54 inch headers, which allow users to access the GPIOs more conveniently.
More information is available on the website of Itead.