so I’ve got a hyperpixel 4.0 rectangular touch screen that i’m trying to figure out the i2c pass through on. I’m running into a wall at the physical layer because all the documentation i can find refers to a 5 pin port on the bottom of the board (labeled i2c and with the pin out in the pictures I’ve found including the one in the listing on pimoroni), but the unit I received from pimoroni has a 4 pin port labeled qw/st in the location that the pictures have the 5 pin port and no 5 pin port anywhere else on the board.
QW/ST is i2c. Those headers/ports were added to a lot of other products and it got a bit of a name change, that’s all. But keep in mind, on the Hyperpixel that its a software i2c, hardware i2c is disabled.
using the alternate i2c interface
Getting Started with HyperPixel 4.0