Elixir + Nerves + keys = Elixir keyboard!
summary
Builds a working keyboard controller with Elixir + Nerves on a Raspberry Pi Zero, replacing the USB-ethernet gadget with a HID gadget, adding Circuits.GPIO to scan a matrix, and keeping an SSH EX shell over Wi‑Fi. Implements layers, on‑the‑fly macro recording and module hot‑reload; observes ~2 ms matrix scan and occasional 12–15 ms matrix→USB spikes. Proof‑of‑concept works in demo; tradeoffs are ~10× cost, larger size and slower boot, plus pending power/suspend handling.
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chapters (9)
- 0:00Start
- 0:29Speaker
- 1:15Outline
- 4:39Nerves 101
- 6:17Baby steps (1/4)
- 11:37A keyboard on top of the BEAM
- 15:50Pros & cons
- 18:35Future work
- 19:34DEMO time
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