The module for building user interfaces can be ordered both on Tindie and on the IoT-devices website. We also plan to add this product to our new Etsy store.
The MCP23017 chip is supported by many platforms, which is why we used it to build the module. In particular, it is very easy to work with the module in ESPHome / Home Assistant, NodeMCU, Tasmota, Arduino.
You can watch a video of ESPHome working with the module on our YouTube channel:

See also other videos on this product.

We also plan to upload examples of the module's use to our GitHub.

 
Easy Links:
https://go.iot-devices.com.ua/i2cui4_v1_tindie
https://go.iot-devices.com.ua/i2c-keypad
https://go.iot-devices.com.ua/i2cui4_v1