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Someone's gonna crack it or come up with an open source alternative any day. Shimano and SRAM are going to cry when people get crappy old derailleurs working with 12+ speed for £50.
the simpleton's version would be this:
https://www.youtube.com/watch?v=RYgaulRbll0
tell it what derailleur you've got (whereupon it looks up pull ratio in a database) and what speed cassette (whereupon it sets the sprocket pitch). Just like a Rohbox.
frankenbike-
Obviously totally doable if you like craft and dodgy hacks, it’s a derailleur we are talking about, not an MRI scanner.
But why would you?
Isn’t an electronic system with sealed motor the reason we don’t want cable actuated systems anymore?
Even worst the cable is pulled by a motor that requires a power source not compatible with the rest of the system.
Breso
Sumo
"Utilizing 128-bit encryption, eTap shift signals are transmitted and received in accordance with SRAM’s proprietary wireless protocol known as AIREA. Each time an eTap groupset is paired, a new encryption code is generated and assigned to the components in this group to ensure complete shifting security."
I want some SRAM now, just to see if I can fuck with it.