SparkFun Qwiic Shim Compatible with Raspberry Pi (Not Included)-Small Form Factor & Foot Print Friction-Based Connector No Soldering Easily Removable HAT Stackable Quick Prototype w/ I2C

I sandwiched this adapter under a display hat on my raspberry pi, and so far it has has worked great.You don't need special drivers or exotic hardware it is I2C with a nice little connector. It can run a Zio SSD1327 OLED display without extra circuitry or external power.No special drivers. No soldering. It prevents dumb mistakes like swapping power and signal pins. It keeps projects modular and tidy. It doesn't prevent you from using another rasper pi hat. The port is accessible and out of the way. I have not had any connectivity issues so far. I like it!

When it works, it does exactly what I want it to do and is flawless. When it works is when I am holding it in place with my finger. I tried gluing it in place, but the heat of the pi quickly negates that. Probably just going to solder it in place. Bottom line is, and I'm not sure if I got a bad copy or something, but there is so much wiggle room in the friction connection system that unless you are holding it in place, it is impossible to get a reliable connection

It's much simpler than soldering I2C components to a custom hat, and a more reliable connection than jumper wires. Sparkfun and Adafruit already have lots of tiny boards that can connect to these QWIIC or Stemma QT connectors. It can simplify a project, and speed up the time needed to build and test it.

The Qwiic shim is as thin as you can get and be a quality product. The potential issue is the quality of the HATS youstack on top of it.