The Apple USB Camera adapter[1] would let you connect your Ergodox to the iPad. If you need power too there's a USB 3 version with an extra lightning port. [1]

The Apple USB Camera adapter[1] would let you connect your Ergodox to the iPad. If you need power too there's a USB 3 version with an extra lightning port. [1]: https://www.apple.com/shop/product/MD821AM/A/lightning-to-usb-camera-adapter https://www.apple.com/shop/product/MD821AM/A/lightning-to-us...