Pi GPIOs are 3.3V. VDD needs to be connected to 3.3V not 5V.
PRO TIP: In many cases, you can just short VCC and VDD together. If your microcontroller uses 3.3V logic however, you'll want to connect VCC to 5V and VDD to 3.3V.
Statistics: Posted by trejan — Wed Sep 03, 2025 6:42 pm