Introduction ： The GPIO Reference board is specifically designed for Raspberry Pi. The Raspberry Module B+ increased to 40 GPIO. It’s difficult to remember the order of the new GPIO and functions. So we make this GPIO Reference board , making the majority user of Raspberry Pi B+ easily identify GPIO . Compatible with Raspberry Pi A+,B+/2. For any technical support or suggestion, please kindly go to our forum. https://elecena.pl/product/27044598/raspberry-pi-a-amp-b-amp-2-gpio-reference-board 2024-10-15 https://elecena.pl/product/27044598/raspberry-pi-a-amp-b-amp-2-gpio-reference-board 2026-01-06