I would be interested in the project, it is still working

@Mateusz-Pięta I use PCB Stackup to generate SVGs from the gerber files. The svgs get converted (on the fly) to rasterised images in the browser. I build a model in three.js where I "punch out"/drill holes in the 3d model based on the transparent areas of the rasterised image. I was surprised of the result myself. Here's a gist with the relevant javascript for creating the 3d-object from front/back svgs: https://gist.github.com/henrikekblad/292349f928fe67ff574cb975fdaa7488

Hello I wanted to understand are you using 2 PCF8574? one for input and another for output? also in the code which entries are to add the relays and assign a specific button? the code if inserted on wemos d1 works? sorry for the many questions because I have to put 8 relays controlled with 8 buttons and interface with domoticz thank you