waveshareGPIO Expander Module Board for Raspberry Pi Pico, with 1x Raspberry Pi Standard 40PIN Header and 1x Pico 2x20PIN Header,Allows Connecting Raspberry Pi Hats and Pico Expansion Boards

It's a nice board, but realize the Pico pins match the labeled pins under "PI HAT", but the "PI HAT" GPIO pins do NOT match all the Raspberry Pi GPIO pinouts. Note for example in the product picture the pin labeled GP14 should actually be GP4 if it was to match the Raspberry Pi's GPIO pinout.Comparing with the Canakit Raspberry Pi GPIO Header Quick Reference card:Waveshare | Actual Raspberry Pi (what the Waveshare pin SHOULD be)----pin #--- |-------pin #-------GP14........................GP4GP4..........................GP14GP5..........................GP15GP11........................GP10GP10........................GP11GP12........................GP9GP10........................GP11GP15........................GP5GP9..........................GP12That's a total of 9 pins that are misplaced on the board. I say 'misplaced' instead of mislabeled only because one could just use the pinouts as they are on the board. For example, pin 14 labeled on the Pico does match up with the pin labeled as GP14 under "PI HAT". All the misplaced pins have electrical continuity with the same pin numbers on the Pico. Major problems will arise, though, when trying to connect a ribbon cable, for example, from the "PI HAT" pins to another Pi-compatible device whose pins are properly placed and labeled. In other words, pin 4 on the board will NOT match up correctly with pin 4 on the Pi-compatible device.I sent an email to Waveshare about this, but they never responded.Again, nice board, but there's no excuse for wrong pin placement. Makes me think Quality Control is lacking. Someone at Waveshare should have spotted these obvious mistakes.

Waveshare makes some of the best items for Raspberry Pi and Arduino boards!

Very clean and easy to read the pinouts. I dare say "elegant" because it's so nice. This, and WaveShare's 1.14" OLED screen are my first Waveshare products, but if they are all like these, I'll be looking for more.