[Umang018]

This is really impressive, especially considering the complexity of designing a wireless split keyboard from scratch! Having built my own mechanical keyboard before (though not wireless), I know how much goes into PCB design, key switch selection, and firmware development.

One challenge I’ve seen with wireless keyboards (especially splits) is managing synchronization lag between halves. Some DIY split builds struggle with Bluetooth interference, while others use NRF-based communication. What approach did you take to keep latency low and ensure reliable keypress synchronization? Also, how does the power efficiency compare to something like a ZMK-powered split?

[varispeed]

Maybe stupid question, but can split keyboard work as two separate keyboards connecting independently to the operating system? That way you don't have to synchronise anything.

[zxter]

There’s no issue with a computer recognizing two keyboards, but smaller keyboards often lack all the keys found on a standard one. So, you’ll need to use modifiers to create the keystroke and then send it to the computer. If you press a modifier on one half, the other half needs to be aware of it to send the final keystroke. Creating a layout with these modifier-based key combinations is just a small part of the many tricks you can pull off with custom firmware. While the computer thinks it’s connected to a standard keyboard, you can do some really deep customization on the keyboard side.