Days ago I wrote a review that I think was unfair. Fortunately, the people at Pimoroni guided me to find a solution to my problem. Now I've been able to add an OLED display and rotary encoder to the keybow2040 so it works the way I wanted it to. Thank you Pimoroni! I leave a couple of links, one of the code (https://github.com/manelto/MacroPad-keybow2040-) and another of the 3D models (https://www.printables.com/model/228327-keybow2040-macropad- with-display-and-encoder), in case other people want to do something similar. I leave the previous review as penance for my ignorance. It's good, but with important shortcomings. The impossibility of using the libraries that have been developed for the device to easily connect other components via I2C (such as OLED screens or encoders) makes it more limited than it should be, especially considering that it has the appropriate connectors to allow this possibility.